Programs & Examples On #Python

How do I manually throw/raise an exception in Python?

Use the most specific Exception constructor that semantically fits your issue.

Be specific in your message, e.g.:

raise ValueError('A very specific bad thing happened.')

Don't raise generic exceptions

Avoid raising a generic Exception. To catch it, you'll have to catch all other more specific exceptions that subclass it.

Problem 1: Hiding bugs

raise Exception('I know Python!') # Don't! If you catch, likely to hide bugs.

For example:

def demo_bad_catch():
    try:
        raise ValueError('Represents a hidden bug, do not catch this')
        raise Exception('This is the exception you expect to handle')
    except Exception as error:
        print('Caught this error: ' + repr(error))

>>> demo_bad_catch()
Caught this error: ValueError('Represents a hidden bug, do not catch this',)

Problem 2: Won't catch

And more specific catches won't catch the general exception:

def demo_no_catch():
    try:
        raise Exception('general exceptions not caught by specific handling')
    except ValueError as e:
        print('we will not catch exception: Exception')
 

>>> demo_no_catch()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in demo_no_catch
Exception: general exceptions not caught by specific handling

Best Practices: raise statement

Instead, use the most specific Exception constructor that semantically fits your issue.

raise ValueError('A very specific bad thing happened')

which also handily allows an arbitrary number of arguments to be passed to the constructor:

raise ValueError('A very specific bad thing happened', 'foo', 'bar', 'baz') 

These arguments are accessed by the args attribute on the Exception object. For example:

try:
    some_code_that_may_raise_our_value_error()
except ValueError as err:
    print(err.args)

prints

('message', 'foo', 'bar', 'baz')    

In Python 2.5, an actual message attribute was added to BaseException in favor of encouraging users to subclass Exceptions and stop using args, but the introduction of message and the original deprecation of args has been retracted.

Best Practices: except clause

When inside an except clause, you might want to, for example, log that a specific type of error happened, and then re-raise. The best way to do this while preserving the stack trace is to use a bare raise statement. For example:

logger = logging.getLogger(__name__)

try:
    do_something_in_app_that_breaks_easily()
except AppError as error:
    logger.error(error)
    raise                 # just this!
    # raise AppError      # Don't do this, you'll lose the stack trace!

Don't modify your errors... but if you insist.

You can preserve the stacktrace (and error value) with sys.exc_info(), but this is way more error prone and has compatibility problems between Python 2 and 3, prefer to use a bare raise to re-raise.

To explain - the sys.exc_info() returns the type, value, and traceback.

type, value, traceback = sys.exc_info()

This is the syntax in Python 2 - note this is not compatible with Python 3:

raise AppError, error, sys.exc_info()[2] # avoid this.
# Equivalently, as error *is* the second object:
raise sys.exc_info()[0], sys.exc_info()[1], sys.exc_info()[2]

If you want to, you can modify what happens with your new raise - e.g. setting new args for the instance:

def error():
    raise ValueError('oops!')

def catch_error_modify_message():
    try:
        error()
    except ValueError:
        error_type, error_instance, traceback = sys.exc_info()
        error_instance.args = (error_instance.args[0] + ' <modification>',)
        raise error_type, error_instance, traceback

And we have preserved the whole traceback while modifying the args. Note that this is not a best practice and it is invalid syntax in Python 3 (making keeping compatibility much harder to work around).

>>> catch_error_modify_message()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in catch_error_modify_message
  File "<stdin>", line 2, in error
ValueError: oops! <modification>

In Python 3:

raise error.with_traceback(sys.exc_info()[2])

Again: avoid manually manipulating tracebacks. It's less efficient and more error prone. And if you're using threading and sys.exc_info you may even get the wrong traceback (especially if you're using exception handling for control flow - which I'd personally tend to avoid.)

Python 3, Exception chaining

In Python 3, you can chain Exceptions, which preserve tracebacks:

raise RuntimeError('specific message') from error

Be aware:

• this does allow changing the error type raised, and
• this is not compatible with Python 2.

Deprecated Methods:

These can easily hide and even get into production code. You want to raise an exception, and doing them will raise an exception, but not the one intended!

Valid in Python 2, but not in Python 3 is the following:

raise ValueError, 'message' # Don't do this, it's deprecated!

Only valid in much older versions of Python (2.4 and lower), you may still see people raising strings:

raise 'message' # really really wrong. don't do this.

In all modern versions, this will actually raise a TypeError, because you're not raising a BaseException type. If you're not checking for the right exception and don't have a reviewer that's aware of the issue, it could get into production.

Example Usage

I raise Exceptions to warn consumers of my API if they're using it incorrectly:

def api_func(foo):
    '''foo should be either 'baz' or 'bar'. returns something very useful.'''
    if foo not in _ALLOWED_ARGS:
        raise ValueError('{foo} wrong, use "baz" or "bar"'.format(foo=repr(foo)))

Create your own error types when apropos

"I want to make an error on purpose, so that it would go into the except"

You can create your own error types, if you want to indicate something specific is wrong with your application, just subclass the appropriate point in the exception hierarchy:

class MyAppLookupError(LookupError):
    '''raise this when there's a lookup error for my app'''

and usage:

if important_key not in resource_dict and not ok_to_be_missing:
    raise MyAppLookupError('resource is missing, and that is not ok.')

I think nt86's solution is the most appropriate because it leverages the underlying Windows infrastructure (certificate store). But it doesn't explain how to install python-certifi-win32 to start with since pip is non functional.

The trick is to use --trustedhost to install python-certifi-win32 and then after that, pip will automatically use the windows certificate store to load the certificate used by the proxy.

So in a nutshell, you should do:

pip install python-certifi-win32 -trustedhost pypi.org

and after that you should be good to go

Before reading this answer, bear in mind that there is another answer below, from Roman Kh, which uses numpy.cumsum and is MUCH MUCH FASTER than this one.

Best One common way to apply a moving/sliding average (or any other sliding window function) to a signal is by using numpy.convolve().

def movingaverage(interval, window_size):
    window = numpy.ones(int(window_size))/float(window_size)
    return numpy.convolve(interval, window, 'same')

Here, interval is your x array, and window_size is the number of samples to consider. The window will be centered on each sample, so it takes samples before and after the current sample in order to calculate the average. Your code would become:

plot(x,y)
xlim(0,1000)

x_av = movingaverage(interval, r)
plot(x_av, y)

xlabel("Months since Jan 1749.")
ylabel("No. of Sun spots")
show()

Hope this helps!

If you don't mind importing then fileinput does exactly what you need (this is you can read the line number of the current line)

To the very first please run the below commands to install python dependencies otherwise python runserver command will throw error.

sudo apt-get install libmysqlclient-dev
sudo pip install MySQL-python

Then configure the settings.py file as defined by #Andy and at the last execute :

python manage.py runserver

Have fun..!!

an algorithmic solution:

list1 = [3,2,4,1, 1]
list2 = ['three', 'two', 'four', 'one', 'one2']


lis = [(list1[i], list2[i]) for i in range(len(list1))]
list1.sort()
list2 = [x[1] for i in range(len(list1)) for x in lis if x[0] == i]

Outputs: -> Output speed: 0.2s

>>>list1
>>>[1, 1, 2, 3, 4]
>>>list2
>>>['one', 'one2', 'two', 'three', 'four']

• Go to the Start Menu

• Right Click "Computer"

• Select "Properties"

• A dialog should pop up with a link on the left called "Advanced system settings". Click it.

• In the System Properties dialog, click the button called "Environment Variables".

• In the Environment Variables dialog look for "Path" under the System Variables window.

• Add ";C:\Python27" to the end of it. The semicolon is the path separator on windows.

• Click Ok and close the dialogs.

• Now open up a new command prompt and type "python" or if it says error type "py" instead of "python"

After creating virtual environment copy the activate.bat file from Script folder of python and paste to it your environment and open cmd from your virtual environment and run activate.bat file.enter image description here

If you want to replace a single semicolon:

for i in range(0,len(line)):
 if (line[i]==";"):
     line = line[:i] + ":" + line[i+1:]

Havent tested it though.

cur.execute( "SELECT * FROM records WHERE email LIKE %s", (search,) )

I do not why, but this works for me . rather than use '%s'.

Try to run the server at a different port. Worked for me:

python manage.py runserver 127.0.0.1:7000

Explanation:

as mentioned on Django documentation:

If you run this script as a user with normal privileges (recommended), you might not have access to start a port on a low port number. Low port numbers are reserved for the superuser (root).

This server uses the WSGI application object specified by the WSGI_APPLICATION setting.

DO NOT USE THIS SERVER IN A PRODUCTION SETTING. It has not gone through security audits or performance tests. (And that’s how it’s gonna stay. We’re in the business of making Web frameworks, not Web servers, so improving this server to be able to handle a production environment is outside the scope of Django.)

Here is very good visual representation about continue and break statements

source

In my case I had special instruction into nginx configuration file:

location ~ \.(js|css|png|jpg|gif|swf|ico|pdf|mov|fla|zip|rar)$ {
            try_files $uri =404;
    }

All clients have received '404' because nginx nothing known about Flask.

I hope it help someone.

If your elements are distinct, then a simple set difference will do.

c = [1,2,3,4,'x',8,6,7,'x',9,'x']
z = list(set(c) - set(['x']))
print z
[1, 2, 3, 4, 6, 7, 8, 9]

Based in the answer of @G M and paying attention to the @John La Rooy's warning, I was able to append a new row opening the file in 'a'mode.

Even in windows, in order to avoid the newline problem, you must declare it as newline=''.

Now you can open the file in 'a'mode (without the b).

import csv

with open(r'names.csv', 'a', newline='') as csvfile:
    fieldnames = ['This','aNew']
    writer = csv.DictWriter(csvfile, fieldnames=fieldnames)

    writer.writerow({'This':'is', 'aNew':'Row'})

I didn't try with the regular writer (without the Dict), but I think that it'll be ok too.

A simple function you can reuse in many places in your code (based on the other answers here):

def firstrun(keyword, _keys=[]):
    """Returns True only the first time it's called with each keyword."""
    if keyword in _keys:
        return False
    else:
        _keys.append(keyword)
        return True

or equivalently (if you like to rely on other libraries):

from collections import defaultdict
from itertools import count
def firstrun(keyword, _keys=defaultdict(count)):
    """Returns True only the first time it's called with each keyword."""
    return not _keys[keyword].next()

Sample usage:

for i in range(20):
    if firstrun('house'):
        build_house() # runs only once
if firstrun(42): # True
    print 'This will print.'
if firstrun(42): # False
    print 'This will never print.'

here is another solution

class MergeSort(object):
    def _merge(self,left, right):
        nl = len(left)
        nr = len(right)
        result = [0]*(nl+nr)
        i=0
        j=0
        for k in range(len(result)):
            if nl>i and nr>j:
                if left[i] <= right[j]:
                    result[k]=left[i]
                    i+=1
                else:
                    result[k]=right[j]
                    j+=1
            elif nl==i:
                result[k] = right[j]
                j+=1
            else: #nr>j:
                result[k] = left[i]
                i+=1
        return result

    def sort(self,arr):
        n = len(arr)
        if n<=1:
            return arr 
        left = self.sort(arr[:n/2])
        right = self.sort(arr[n/2:] )
        return self._merge(left, right)
def main():
    import random
    a= range(100000)
    random.shuffle(a)
    mr_clss = MergeSort()
    result = mr_clss.sort(a)
    #print result

if __name__ == '__main__':
    main()

and here is run time for list with 100000 elements:

real    0m1.073s
user    0m1.053s
sys         0m0.017s

You can do this after you validate your data.

if myform.is_valid():
  data = myform.cleaned_data
  field = data['field']

Also, read the django docs. They are perfect.

Use hexlify - http://epydoc.sourceforge.net/stdlib/binascii-module.html

Coordinating access to a single file at the OS level is fraught with all kinds of issues that you probably don't want to solve.

Your best bet is have a separate process that coordinates read/write access to that file.

If you are using a mac and sublime text 3, this is what you do.

Go to your /Packages/User/ and create a file called Python.sublime-settings.

Typically /Packages/User is inside your ~/Library/Application Support/Sublime Text 3/Packages/User/Python.sublime-settings if you are using mac os x.

Then you put this in the Python.sublime-settings.

{
    "tab_size": 4,
    "translate_tabs_to_spaces": false
}

Credit goes to Mark Byer's answer, sublime text 3 docs and python style guide.

This answer is mostly for readers who had the same issue and stumble upon this and are using sublime text 3 on Mac OS X.

for line in file('/tmp/foo'):
    print line.strip('\n')

def oneFunction(lists):
    category=random.choice(list(lists.keys()))
    word=random.choice(lists[category])
    return word

def anotherFunction():
    for letter in word:             
        print("_",end=" ")

I got the same error when I was trying to install a package (flask-classful).
I made the mistake of installing anaconda as root. I changed the ownership of the installed anaconda folder and I could install the package successfully.

Use the command chown with option -R to recursively change ownership of the installed anaconda folder like so:

chown -R owner:group /path/to/anaconda

Here owner is your username and group is the group name.

If you have a two-dimensional array in Python (not numpy), you can extract all the columns like so,

data = [
['a', 1, 2], 
['b', 3, 4], 
['c', 5, 6]
]

columns = list(zip(*data))

print("column[0] = {}".format(columns[0]))
print("column[1] = {}".format(columns[1]))
print("column[2] = {}".format(columns[2]))

Executing this code will yield,

>>> print("column[0] = {}".format(columns[0]))
column[0] = ('a', 'b', 'c')

>>> print("column[1] = {}".format(columns[1]))
column[1] = (1, 3, 5)

>>> print("column[2] = {}".format(columns[2]))
column[2] = (2, 4, 6)

Of course, you can extract a single column by index (e.g. columns[0])

Here is the code:

import os
existGDBPath = r'T:\Data\DBDesign\DBDesign_93_v141b.mdb'
wkspFldr = os.path.dirname(existGDBPath)
print wkspFldr # T:\Data\DBDesign

this way is a bit more flexible than using all():

my_list = [[1, 2, 0], [1, 2, 0], [1, 2, 0]]
all_zeros = False if False in [x[2] == 0 for x in my_list] else True
any_zeros = True if True in [x[2] == 0 for x in my_list] else False

or more succinctly:

all_zeros = not False in [x[2] == 0 for x in my_list]
any_zeros = 0 in [x[2] for x in my_list]

I would try:

self.wordList = list(wordList)

to force it to make a copy instead of referencing the same object.

The whole point of a class is that you create an instance, and that instance encapsulates a set of data. So it's wrong to say that your variables are global within the scope of the class: say rather that an instance holds attributes, and that instance can refer to its own attributes in any of its code (via self.whatever). Similarly, any other code given an instance can use that instance to access the instance's attributes - ie instance.whatever.

The standard numpy methods for calculation mean squared error (variance) and its square root (standard deviation) are numpy.var() and numpy.std(), see here and here. They apply to matrices and have the same syntax as numpy.mean().

I suppose that the question and the preceding answers might have been posted before these functions became available.

For me the problem was that I was using different versions of Python in the same Eclipse project. My setup was not consistent with the Project Properties and the Run Configuration Python versions.

In Project > Properties > PyDev, I had the Interpreter set to Python2.7.11.

In Run Configurations > Interpreter, I was using the Default Interpreter. Changing it to Python 2.7.11 fixed the problem.

i founded here, its ok with me for linkedin: https://auth0.com/docs/flows/guides/auth-code/call-api-auth-code so my code with with linkedin login here:

ref = 'https://api.linkedin.com/v2/me'
headers = {"content-type": "application/json; charset=UTF-8",'Authorization':'Bearer {}'.format(access_token)}
Linkedin_user_info = requests.get(ref1, headers=headers).json()

I'd say

chunks = [data[x:x+100] for x in range(0, len(data), 100)]

If you are using python 2.x instead of 3.x, you can be more memory-efficient by using xrange(), changing the above code to:

chunks = [data[x:x+100] for x in xrange(0, len(data), 100)]

You can get the path via fp.name. Example:

>>> f = open('foo/bar.txt')
>>> f.name
'foo/bar.txt'

You might need os.path.basename if you want only the file name:

>>> import os
>>> f = open('foo/bar.txt')
>>> os.path.basename(f.name)
'bar.txt'

File object docs (for Python 2) here.

You're looking for the zip builtin function. From the docs:

>>> x = [1, 2, 3]
>>> y = [4, 5, 6]
>>> zipped = zip(x, y)
>>> zipped
[(1, 4), (2, 5), (3, 6)]

type() is a better solution than isinstance(), particularly for booleans:

True and False are just keywords that mean 1 and 0 in python. Thus,

isinstance(True, int)

and

isinstance(False, int)

both return True. Both booleans are an instance of an integer. type(), however, is more clever:

type(True) == int

returns False.

using pywin32:

from win32com.client import Dispatch

session = Dispatch('MAPI.session')
session.Logon('','',0,1,0,0,'exchange.foo.com\nUserName');
msg = session.Outbox.Messages.Add('Hello', 'This is a test')
msg.Recipients.Add('Corey', 'SMTP:[email protected]')
msg.Send()
session.Logoff()

IndexError: invalid index to scalar variable happens when you try to index a numpy scalar such as numpy.int64 or numpy.float64. It is very similar to TypeError: 'int' object has no attribute '__getitem__' when you try to index an int.

>>> a = np.int64(5)
>>> type(a)
<type 'numpy.int64'>
>>> a[3]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: invalid index to scalar variable.
>>> a = 5
>>> type(a)
<type 'int'>
>>> a[3]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object has no attribute '__getitem__'

Assuming that you have your data in a 2d array, this should work:

import numpy
import pylab
xy = numpy.zeros((2, 1000))
xy[0] = range(1000)
xy[1] = range(1000)
colors = [int(i % 23) for i in xy[0]]
pylab.scatter(xy[0], xy[1], c=colors)
pylab.show()

You can also set a cmap attribute to control which colors will appear through use of a colormap; i.e. replace the pylab.scatter line with:

pylab.scatter(xy[0], xy[1], c=colors, cmap=pylab.cm.cool)

A list of color maps can be found here

Try the following code to find the optimal camera position

Move the viewing angle of the plot using the keyboard keys as mentioned in the if clause

Use print to get the camera positions

def move_view(event):
    ax.autoscale(enable=False, axis='both') 
    koef = 8
    zkoef = (ax.get_zbound()[0] - ax.get_zbound()[1]) / koef
    xkoef = (ax.get_xbound()[0] - ax.get_xbound()[1]) / koef
    ykoef = (ax.get_ybound()[0] - ax.get_ybound()[1]) / koef
    ## Map an motion to keyboard shortcuts
    if event.key == "ctrl+down":
        ax.set_ybound(ax.get_ybound()[0] + xkoef, ax.get_ybound()[1] + xkoef)
    if event.key == "ctrl+up":
        ax.set_ybound(ax.get_ybound()[0] - xkoef, ax.get_ybound()[1] - xkoef)
    if event.key == "ctrl+right":
        ax.set_xbound(ax.get_xbound()[0] + ykoef, ax.get_xbound()[1] + ykoef)
    if event.key == "ctrl+left":
        ax.set_xbound(ax.get_xbound()[0] - ykoef, ax.get_xbound()[1] - ykoef)
    if event.key == "down":
        ax.set_zbound(ax.get_zbound()[0] - zkoef, ax.get_zbound()[1] - zkoef)
    if event.key == "up":
        ax.set_zbound(ax.get_zbound()[0] + zkoef, ax.get_zbound()[1] + zkoef)
    # zoom option
    if event.key == "alt+up":
        ax.set_xbound(ax.get_xbound()[0]*0.90, ax.get_xbound()[1]*0.90)
        ax.set_ybound(ax.get_ybound()[0]*0.90, ax.get_ybound()[1]*0.90)
        ax.set_zbound(ax.get_zbound()[0]*0.90, ax.get_zbound()[1]*0.90)
    if event.key == "alt+down":
        ax.set_xbound(ax.get_xbound()[0]*1.10, ax.get_xbound()[1]*1.10)
        ax.set_ybound(ax.get_ybound()[0]*1.10, ax.get_ybound()[1]*1.10)
        ax.set_zbound(ax.get_zbound()[0]*1.10, ax.get_zbound()[1]*1.10)
    
    # Rotational movement
    elev=ax.elev
    azim=ax.azim
    if event.key == "shift+up":
        elev+=10
    if event.key == "shift+down":
        elev-=10
    if event.key == "shift+right":
        azim+=10
    if event.key == "shift+left":
        azim-=10

    ax.view_init(elev= elev, azim = azim)

    # print which ever variable you want 

    ax.figure.canvas.draw()

fig.canvas.mpl_connect("key_press_event", move_view)

plt.show()

There is a built in method which would be the fastest method also, calling tolist on the .values np array:

df.values.tolist()

[[0.0, 3.61, 380.0, 3.0],
 [1.0, 3.67, 660.0, 3.0],
 [1.0, 3.19, 640.0, 4.0],
 [0.0, 2.93, 520.0, 4.0]]

As I commented you need to use a StringIO object and decode i.e c=pd.read_csv(io.StringIO(s.decode("utf-8"))) if using requests, you need to decode as .content returns bytes if you used .text you would just need to pass s as is s = requests.get(url).text c = pd.read_csv(StringIO(s)).

A simpler approach is to pass the correct url of the raw data directly to read_csv, you don't have to pass a file like object, you can pass a url so you don't need requests at all:

c = pd.read_csv("https://raw.githubusercontent.com/cs109/2014_data/master/countries.csv")

print(c)

Output:

                              Country         Region
0                             Algeria         AFRICA
1                              Angola         AFRICA
2                               Benin         AFRICA
3                            Botswana         AFRICA
4                             Burkina         AFRICA
5                             Burundi         AFRICA
6                            Cameroon         AFRICA
..................................

From the docs:

filepath_or_buffer :

string or file handle / StringIO The string could be a URL. Valid URL schemes include http, ftp, s3, and file. For file URLs, a host is expected. For instance, a local file could be file ://localhost/path/to/table.csv

reduce(lambda x,y: mydict.get(y) and x.append(mydict[y]) or x, mykeys,[])

incase there are keys not in dict.

After stumbling around, this worked for me:

df = df.astype(object).where(pd.notnull(df),None)

Here's a piece of code that checks whether a number is an integer or not, it works for both Python 2 and Python 3.

import sys

if sys.version < '3':
    integer_types = (int, long,)
else:
    integer_types = (int,)

isinstance(yourNumber, integer_types)  # returns True if it's an integer
isinstance(yourNumber, float)  # returns True if it's a float

Notice that Python 2 has both types int and long, while Python 3 has only type int. Source.

If you want to check whether your number is a float that represents an int, do this

(isinstance(yourNumber, float) and (yourNumber).is_integer())  # True for 3.0

If you don't need to distinguish between int and float, and are ok with either, then ninjagecko's answer is the way to go

import numbers

isinstance(yourNumber, numbers.Real)

80% of the time, when folks say "daemon", they only want a server. Since the question is perfectly unclear on this point, it's hard to say what the possible domain of answers could be. Since a server is adequate, start there. If an actual "daemon" is actually needed (this is rare), read up on nohup as a way to daemonize a server.

Until such time as an actual daemon is actually required, just write a simple server.

Also look at the WSGI reference implementation.

Also look at the Simple HTTP Server.

"Are there any additional things that need to be considered? " Yes. About a million things. What protocol? How many requests? How long to service each request? How frequently will they arrive? Will you use a dedicated process? Threads? Subprocesses? Writing a daemon is a big job.

1. Decode the string to Unicode. Assuming it's UTF-8-encoded:

   str.decode("utf-8")
   

2. Call the replace method and be sure to pass it a Unicode string as its first argument:

   str.decode("utf-8").replace(u"\u2022", "*")
   

3. Encode back to UTF-8, if needed:

   str.decode("utf-8").replace(u"\u2022", "*").encode("utf-8")
   

(Fortunately, Python 3 puts a stop to this mess. Step 3 should really only be performed just prior to I/O. Also, mind you that calling a string str shadows the built-in type str.)

If what you want is a way to turn your class into kind of a list without subclassing list, then just make a method that returns a list:

def MyClass():
    def __init__(self):
        self.value1 = 1
        self.value2 = 2

    def get_list(self):
        return [self.value1, self.value2...]


>>>print MyClass().get_list()
[1, 2...]

If you meant that print MyClass() will print a list, just override __repr__:

class MyClass():        
    def __init__(self):
        self.value1 = 1
        self.value2 = 2

    def __repr__(self):
        return repr([self.value1, self.value2])

EDIT: I see you meant how to make objects compare. For that, you override the __cmp__ method.

class MyClass():
    def __cmp__(self, other):
        return cmp(self.get_list(), other.get_list())

Assuming you use the declarative style (i.e. ORM classes), it is pretty easy:

query = db_session.query(User.id, User.name).filter(User.id.in_([123,456]))
results = query.all()

db_session is your database session here, while User is the ORM class with __tablename__ equal to "users".

You can use json.loads:

import json
import requests

response = requests.get(...)
json_data = json.loads(response.text)

This converts a given string into a dictionary which allows you to access your JSON data easily within your code.

Or you can use @Martijn's helpful suggestion, and the higher voted answer, response.json().

This is a solution that saves the profile directory for Firefox (similar to the user-data-dir (user data directory) in Chrome) (it involves manually copying the directory around. I haven't been able to find another way):

It was tested on Linux.

Short version:

• To save the profile

driver.execute_script("window.close()")
time.sleep(0.5)
currentProfilePath = driver.capabilities["moz:profile"]
profileStoragePath = "/tmp/abc"
shutil.copytree(currentProfilePath, profileStoragePath,
                ignore_dangling_symlinks=True
                )

• To load the profile

driver = Firefox(executable_path="geckodriver-v0.28.0-linux64",
                 firefox_profile=FirefoxProfile(profileStoragePath)
                )

Long version (with demonstration that it works and a lot of explanation -- see comments in the code)

The code uses localStorage for demonstration, but it works with cookies as well.

#initial imports

from selenium.webdriver import Firefox, FirefoxProfile

import shutil
import os.path
import time

# Create a new profile

driver = Firefox(executable_path="geckodriver-v0.28.0-linux64",
                  # * I'm using this particular version. If yours is
                  # named "geckodriver" and placed in system PATH
                  # then this is not necessary
                )

# Navigate to an arbitrary page and set some local storage
driver.get("https://DuckDuckGo.com")
assert driver.execute_script(r"""{
        const tmp = localStorage.a; localStorage.a="1";
        return [tmp, localStorage.a]
    }""") == [None, "1"]

# Make sure that the browser writes the data to profile directory.
# Choose one of the below methods
if 0:
    # Wait for some time for Firefox to flush the local storage to disk.
    # It's a long time. I tried 3 seconds and it doesn't work.
    time.sleep(10)

elif 1:
    # Alternatively:
    driver.execute_script("window.close()")
    # NOTE: It might not work if there are multiple windows!

    # Wait for a bit for the browser to clean up
    # (shutil.copytree might throw some weird error if the source directory changes while copying)
    time.sleep(0.5)

else:
    pass
    # I haven't been able to find any other, more elegant way.
    #`close()` and `quit()` both delete the profile directory


# Copy the profile directory (must be done BEFORE driver.quit()!)
currentProfilePath = driver.capabilities["moz:profile"]
assert os.path.isdir(currentProfilePath)
profileStoragePath = "/tmp/abc"
try:
    shutil.rmtree(profileStoragePath)
except FileNotFoundError:
    pass

shutil.copytree(currentProfilePath, profileStoragePath,
                ignore_dangling_symlinks=True # There's a lock file in the
                                              # profile directory that symlinks
                                              # to some IP address + port
               )

driver.quit()
assert not os.path.isdir(currentProfilePath)
# Selenium cleans up properly if driver.quit() is called,
# but not necessarily if the object is destructed


# Now reopen it with the old profile

driver=Firefox(executable_path="geckodriver-v0.28.0-linux64",
               firefox_profile=FirefoxProfile(profileStoragePath)
              )

# Note that the profile directory is **copied** -- see FirefoxProfile documentation
assert driver.profile.path!=profileStoragePath
assert driver.capabilities["moz:profile"]!=profileStoragePath

# Confusingly...
assert driver.profile.path!=driver.capabilities["moz:profile"]
# And only the latter is updated.
# To save it again, use the same method as previously mentioned

# Check the data is still there

driver.get("https://DuckDuckGo.com")

data = driver.execute_script(r"""return localStorage.a""")
assert data=="1", data

driver.quit()

assert not os.path.isdir(driver.capabilities["moz:profile"])
assert not os.path.isdir(driver.profile.path)

What doesn't work:

• Initialize Firefox(capabilities={"moz:profile": "/path/to/directory"}) -- the driver will not be able to connect.
• options=Options(); options.add_argument("profile"); options.add_argument("/path/to/directory"); Firefox(options=options) -- same as above.

Another Python PCA using numpy. The same idea as @doug but that one didn't run.

from numpy import array, dot, mean, std, empty, argsort
from numpy.linalg import eigh, solve
from numpy.random import randn
from matplotlib.pyplot import subplots, show

def cov(X):
    """
    Covariance matrix
    note: specifically for mean-centered data
    note: numpy's `cov` uses N-1 as normalization
    """
    return dot(X.T, X) / X.shape[0]
    # N = data.shape[1]
    # C = empty((N, N))
    # for j in range(N):
    #   C[j, j] = mean(data[:, j] * data[:, j])
    #   for k in range(j + 1, N):
    #       C[j, k] = C[k, j] = mean(data[:, j] * data[:, k])
    # return C

def pca(data, pc_count = None):
    """
    Principal component analysis using eigenvalues
    note: this mean-centers and auto-scales the data (in-place)
    """
    data -= mean(data, 0)
    data /= std(data, 0)
    C = cov(data)
    E, V = eigh(C)
    key = argsort(E)[::-1][:pc_count]
    E, V = E[key], V[:, key]
    U = dot(data, V)  # used to be dot(V.T, data.T).T
    return U, E, V

""" test data """
data = array([randn(8) for k in range(150)])
data[:50, 2:4] += 5
data[50:, 2:5] += 5

""" visualize """
trans = pca(data, 3)[0]
fig, (ax1, ax2) = subplots(1, 2)
ax1.scatter(data[:50, 0], data[:50, 1], c = 'r')
ax1.scatter(data[50:, 0], data[50:, 1], c = 'b')
ax2.scatter(trans[:50, 0], trans[:50, 1], c = 'r')
ax2.scatter(trans[50:, 0], trans[50:, 1], c = 'b')
show()

Which yields the same thing as the much shorter

from sklearn.decomposition import PCA

def pca2(data, pc_count = None):
    return PCA(n_components = 4).fit_transform(data)

As I understand it, using eigenvalues (first way) is better for high-dimensional data and fewer samples, whereas using Singular value decomposition is better if you have more samples than dimensions.

The best way now is to use the "Quit" button that is just to the left of the "Logout" button. I have to admit that I do not understand the utility of the Logout button. However, I am glad that they have added the exceedingly useful Quit button.

The below is a little slow, but it gives a nicely formatted list of packages that pip is aware of. That is to say, not all of them were installed "by" pip, but all of them should be able to be upgraded by pip.

$ pip search . | egrep -B1 'INSTALLED|LATEST'

The reason it is slow is that it lists the contents of the entire pypi repo. I filed a ticket suggesting pip list provide similar functionality but more efficiently.

Sample output: (restricted the search to a subset instead of '.' for all.)

$ pip search selenium | egrep -B1 'INSTALLED|LATEST'

selenium                  - Python bindings for Selenium
  INSTALLED: 2.24.0
  LATEST:    2.25.0
--
robotframework-selenium2library - Web testing library for Robot Framework
  INSTALLED: 1.0.1 (latest)
$

The corrected code is

import urllib.request
fhand = urllib.request.urlopen('http://data.pr4e.org/romeo.txt')
counts = dict()
for line in fhand: 
    words = line.decode().split() 
for word in words: 
    counts[word] = counts.get(word, 0) + 1 
print(counts) 

running the code above produces

{'Who': 1, 'is': 1, 'already': 1, 'sick': 1, 'and': 1, 'pale': 1, 'with': 1, 'grief': 1}

@Paolo's s[::-1] is fastest; a slower approach (maybe more readable, but that's debatable) is ''.join(reversed(s)).

This might not be as fast as the izip_longest solution (I didn't actually test it), but it will work with python < 2.6 (izip_longest was added in 2.6):

from itertools import imap

def grouper(n, iterable):
    "grouper(3, 'ABCDEFG') --> ('A,'B','C'), ('D','E','F'), ('G',None,None)"
    args = [iter(iterable)] * n

    return imap(None, *args)

If you need to go earlier than 2.3, you can substitute the built-in map for imap. The disadvantage is that it provides no ability to customize the fill value.

A couple of things for ya:

The loading would be "better" like this:

with file('morsecodes.txt', 'rt') as f:
   for line in f:
      line = line.strip()
      if len(line) > 0:
         # do your stuff to parse the file

That way you don't need to close, and you don't need to manually load each line, etc., etc.

for letter in userInput:
   if ValidateLetter(letter):  # you need to define this
      code = GetMorseCode(letter)  # from my other answer
      # do whatever you want

The os module handles all that stuff.

os.listdir(path)

Return a list containing the names of the entries in the directory given by path. The list is in arbitrary order. It does not include the special entries '.' and '..' even if they are present in the directory.

Availability: Unix, Windows.

From "What’s New in Python 2.6 - Interpreter Changes":

Python can now be prevented from writing .pyc or .pyo files by supplying the -B switch to the Python interpreter, or by setting the PYTHONDONTWRITEBYTECODE environment variable before running the interpreter. This setting is available to Python programs as the sys.dont_write_bytecode variable, and Python code can change the value to modify the interpreter’s behaviour.

Update 2010-11-27: Python 3.2 addresses the issue of cluttering source folders with .pyc files by introducing a special __pycache__ subfolder, see What's New in Python 3.2 - PYC Repository Directories.

For something that works with the 2.X standard library try:

calendar.timegm(time.strptime(date.split(".")[0]+"UTC", "%Y-%m-%dT%H:%M:%S%Z"))

calendar.timegm is the missing gm version of time.mktime.

I found a way if you're going across classes and want the class the method belongs to AND the method. It takes a bit of extraction work but it makes its point. This works in Python 2.7.13.

import inspect, os

class ClassOne:
    def method1(self):
        classtwoObj.method2()

class ClassTwo:
    def method2(self):
        curframe = inspect.currentframe()
        calframe = inspect.getouterframes(curframe, 4)
        print '\nI was called from', calframe[1][3], \
        'in', calframe[1][4][0][6: -2]

# create objects to access class methods
classoneObj = ClassOne()
classtwoObj = ClassTwo()

# start the program
os.system('cls')
classoneObj.method1()

tl;dr

for first_item in muh_set: break remains the optimal approach in Python 3.x. ^{Curse you, Guido.}

y u do this

Welcome to yet another set of Python 3.x timings, extrapolated from wr.'s excellent Python 2.x-specific response. Unlike AChampion's equally helpful Python 3.x-specific response, the timings below also time outlier solutions suggested above – including:

• list(s)[0], John's novel sequence-based solution.
• random.sample(s, 1), dF.'s eclectic RNG-based solution.

Code Snippets for Great Joy

Turn on, tune in, time it:

from timeit import Timer

stats = [
    "for i in range(1000): \n\tfor x in s: \n\t\tbreak",
    "for i in range(1000): next(iter(s))",
    "for i in range(1000): s.add(s.pop())",
    "for i in range(1000): list(s)[0]",
    "for i in range(1000): random.sample(s, 1)",
]

for stat in stats:
    t = Timer(stat, setup="import random\ns=set(range(100))")
    try:
        print("Time for %s:\t %f"%(stat, t.timeit(number=1000)))
    except:
        t.print_exc()

Quickly Obsoleted Timeless Timings

Behold! Ordered by fastest to slowest snippets:

$ ./test_get.py
Time for for i in range(1000): 
    for x in s: 
        break:   0.249871
Time for for i in range(1000): next(iter(s)):    0.526266
Time for for i in range(1000): s.add(s.pop()):   0.658832
Time for for i in range(1000): list(s)[0]:   4.117106
Time for for i in range(1000): random.sample(s, 1):  21.851104

Faceplants for the Whole Family

Unsurprisingly, manual iteration remains at least twice as fast as the next fastest solution. Although the gap has decreased from the Bad Old Python 2.x days (in which manual iteration was at least four times as fast), it disappoints the PEP 20 zealot in me that the most verbose solution is the best. At least converting a set into a list just to extract the first element of the set is as horrible as expected. Thank Guido, may his light continue to guide us.

Surprisingly, the RNG-based solution is absolutely horrible. List conversion is bad, but random really takes the awful-sauce cake. So much for the Random Number God.

I just wish the amorphous They would PEP up a set.get_first() method for us already. If you're reading this, They: "Please. Do something."

def attributeSelection():
balance = 25
print("Your SP balance is currently 25.")
strength = input("How much SP do you want to put into strength?")
balanceAfterStrength = balance - int(strength)
if balanceAfterStrength == 0:
    print("Your SP balance is now 0.")
    attributeConfirmation()
elif strength < 0:
    print("That is an invalid input. Restarting attribute selection. Keep an eye on your balance this time!")
    attributeSelection()
elif strength > balance:
    print("That is an invalid input. Restarting attribute selection. Keep an eye on your balance this time!")
    attributeSelection()
elif balanceAfterStrength > 0 and balanceAfterStrength < 26:
    print("Ok. You're balance is now at " + str(balanceAfterStrength) + " skill points.")
else:
    print("That is an invalid input. Restarting attribute selection.")
    attributeSelection()

You want to pass the function object hi to your loop() function, not the result of a call to hi() (which is None since hi() doesn't return anything).

So try this:

>>> loop(hi, 5)
hi
hi
hi
hi
hi

Perhaps this will help you understand better:

>>> print hi()
hi
None
>>> print hi
<function hi at 0x0000000002422648>

use in the script:

echo $(python python_script.py arg1 arg2) > /dev/null

or

python python_script.py "string arg"  > /dev/null

The script will be executed without output.

Writing the whole path/directory eg. (for windows) C:\Programs\Python\Python36-32\Scripts\pip3.exe install mypackage. This worked well for me when I had trouble with pip.

Try IDLE, and use Alt + X to find indentation.

Very late answer, but you can simply use:

import time
today = time.strftime("%Y-%m-%d")
# 2021-02-18

Re-migrate approach for a cleaner plate.

This can painlessly be done IF other apps do not foreign key models from the app to be renamed. Check and make sure their migration files don't list any migrations from this one.

1. Backup your database. Dump all tables with a) data + schema for possible circular dependencies, and b) just data for reloading.
2. Run your tests.
3. Check all code into VCS.
4. Delete the database tables of the app to be renamed.
5. Delete the permissions: delete from auth_permission where content_type_id in (select id from django_content_type where app_label = '<OldAppName>')
6. Delete content types: delete from django_content_type where app_label = '<OldAppName>'
7. Rename the folder of the app.
8. Change any references to your app in their dependencies, i.e. the app's views.py, urls.py , 'manage.py' , and settings.py files.
9. Delete migrations: delete from django_migrations where app = '<OldAppName>'
10. If your models.py 's Meta Class has app_name listed, make sure to rename that too (mentioned by @will).
11. If you've namespaced your static or templates folders inside your app, you'll also need to rename those. For example, rename old_app/static/old_app to new_app/static/new_app.
12. If you defined app config in apps.py; rename those, and rename their references in settings.INSTALLED_APPS
13. Delete migration files.
14. Re-make migrations, and migrate.
15. Load your table data from backups.

Alex mentioned memory efficiency, and Roberto mentions convenience, and these are both good points. For a few more ideas, I'll mention speed and functionality.

Functionality: You get a lot built in with NumPy, FFTs, convolutions, fast searching, basic statistics, linear algebra, histograms, etc. And really, who can live without FFTs?

Speed: Here's a test on doing a sum over a list and a NumPy array, showing that the sum on the NumPy array is 10x faster (in this test -- mileage may vary).

from numpy import arange
from timeit import Timer

Nelements = 10000
Ntimeits = 10000

x = arange(Nelements)
y = range(Nelements)

t_numpy = Timer("x.sum()", "from __main__ import x")
t_list = Timer("sum(y)", "from __main__ import y")
print("numpy: %.3e" % (t_numpy.timeit(Ntimeits)/Ntimeits,))
print("list:  %.3e" % (t_list.timeit(Ntimeits)/Ntimeits,))

which on my systems (while I'm running a backup) gives:

numpy: 3.004e-05
list:  5.363e-04

A solution is available that allows me to keep my MacPorts installation by configuring the Ipython kernelspec.

Requirements:

• MacPorts is installed in the usual /opt directory
• python 2.7 is installed through macports
• python 3.4 is installed through macports
• Ipython is installed for python 2.7
• Ipython is installed for python 3.4

For python 2.x:

$ cd /opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin
$ sudo ./ipython kernelspec install-self

For python 3.x:

$ cd /opt/local/Library/Frameworks/Python.framework/Versions/3.4/bin
$ sudo ./ipython kernelspec install-self

Now you can open an Ipython notebook and then choose a python 2.x or a python 3.x notebook.

I also got this error recently when using Anaconda on a Mac machine.

Here is what I found:

1. After running python3 -m pip install PyMySql, pymysql module is under /Library/Python/3.7/site-packages
2. Anaconda wants this module to be under /opt/anaconda3/lib/python3.8/site-packages

Therefore, after copying pymysql module to the designated path, it runs correctly.

I always prefer access dict objects via .items(), so for flattening dicts I use the following recursive generator flat_items(d). If you like to have dict again, simply wrap it like this: flat = dict(flat_items(d))

def flat_items(d, key_separator='.'):
    """
    Flattens the dictionary containing other dictionaries like here: https://stackoverflow.com/questions/6027558/flatten-nested-python-dictionaries-compressing-keys

    >>> example = {'a': 1, 'c': {'a': 2, 'b': {'x': 5, 'y' : 10}}, 'd': [1, 2, 3]}
    >>> flat = dict(flat_items(example, key_separator='_'))
    >>> assert flat['c_b_y'] == 10
    """
    for k, v in d.items():
        if type(v) is dict:
            for k1, v1 in flat_items(v, key_separator=key_separator):
                yield key_separator.join((k, k1)), v1
        else:
            yield k, v

You just need to enter this command:

sudo apt-get install gcc

If I understand correctly, you're already using pandas.read_csv() but would like to speed up the development process so that you don't have to load the file in every time you edit your script, is that right? I have a few recommendations:

1. you could load in only part of the CSV file using pandas.read_csv(..., nrows=1000) to only load the top bit of the table, while you're doing the development

2. use ipython for an interactive session, such that you keep the pandas table in memory as you edit and reload your script.

3. convert the csv to an HDF5 table

4. updated use DataFrame.to_feather() and pd.read_feather() to store data in the R-compatible feather binary format that is super fast (in my hands, slightly faster than pandas.to_pickle() on numeric data and much faster on string data).

You might also be interested in this answer on stackoverflow.

The above solution will modify the infs that are not in the target columns. To remedy that,

lst = [np.inf, -np.inf]
to_replace = {v: lst for v in ['col1', 'col2']}
df.replace(to_replace, np.nan)

For overlapping count we can use use:

def count_substring(string, sub_string):
    count=0
    beg=0
    while(string.find(sub_string,beg)!=-1) :
        count=count+1
        beg=string.find(sub_string,beg)
        beg=beg+1
    return count

For non-overlapping case we can use count() function:

string.count(sub_string)

The problem obviously was (as you figured it out) that port 36250 wasn't open on the server side at the time you tried to connect (hence connection refused). I can see the server was supposed to open this socket after receiving SEND command on another connection, but it apparently was "not opening [it] up in sync with the client side".

Well, the main reason would be there was no synchronisation whatsoever. Calling:

cs.send("SEND " + FILE)
cs.close()

would just place the data into a OS buffer; close would probably flush the data and push into the network, but it would almost certainly return before the data would reach the server. Adding sleep after close might mitigate the problem, but this is not synchronisation.

The correct solution would be to make sure the server has opened the connection. This would require server sending you some message back (for example OK, or better PORT 36250 to indicate where to connect). This would make sure the server is already listening.

The other thing is you must check the return values of send to make sure how many bytes was taken from your buffer. Or use sendall.

(Sorry for disturbing with this late answer, but I found this to be a high traffic question and I really didn't like the sleep idea in the comments section.)

list1 = (x[0] for x in source_list)
list2 = (x[1] for x in source_list)

The difference between:

parser.add_argument("--debug", help="Debug", nargs='?', type=int, const=1, default=7)

and

parser.add_argument("--debug", help="Debug", nargs='?', type=int, const=1)

is thus:

myscript.py => debug is 7 (from default) in the first case and "None" in the second

myscript.py --debug => debug is 1 in each case

myscript.py --debug 2 => debug is 2 in each case

Alternate solution :

reduce(lambda x,newObj : x +[newObj] if somecond else x,myarr,myarr)

I wasn't happy with any of these approaches, so I came up with a Flexlist class that allows for flexible indexing, either by integer, slice or index-list:

class Flexlist(list):
    def __getitem__(self, keys):
        if isinstance(keys, (int, slice)): return list.__getitem__(self, keys)
        return [self[k] for k in keys]

Which, for your example, you would use as:

L = Flexlist(['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'])
Idx = [0, 3, 7]
T = L[ Idx ]

print(T)  # ['a', 'd', 'h']

I am working with a Python code for a REST API, so this is for those who are working on similar projects.

I extract data from an URL using a POST request and the raw output is JSON. For some reason the output is already a dictionary, not a list, and I'm able to refer to the nested dictionary keys right away, like this:

datapoint_1 = json1_data['datapoints']['datapoint_1']

where datapoint_1 is inside the datapoints dictionary.

If I understand your question correctly:

for elem in doc.findall('timeSeries/values/value'):
    print elem.get('dateTime'), elem.text

or if you prefer (and if there is only one occurrence of timeSeries/values:

values = doc.find('timeSeries/values')
for value in values:
    print value.get('dateTime'), elem.text

The findall() method returns a list of all matching elements, whereas find() returns only the first matching element. The first example loops over all the found elements, the second loops over the child elements of the values element, in this case leading to the same result.

I don't see where the problem with not finding timeSeries comes from however. Maybe you just forgot the getroot() call? (note that you don't really need it because you can work from the elementtree itself too, if you change the path expression to for example /timeSeriesResponse/timeSeries/values or //timeSeries/values)

You also can use pdfkit:

Usage

import pdfkit
pdfkit.from_url('http://google.com', 'out.pdf')

Install

MacOS: brew install Caskroom/cask/wkhtmltopdf

Debian/Ubuntu: apt-get install wkhtmltopdf

Windows: choco install wkhtmltopdf

See official documentation for MacOS/Ubuntu/other OS: https://github.com/JazzCore/python-pdfkit/wiki/Installing-wkhtmltopdf

One more thing that I would definitely like to highlight as logit is just a raw output, generally the output of last layer. This can be a negative value as well. If we use it as it's for "cross entropy" evaluation as mentioned below:

-tf.reduce_sum(y_true * tf.log(logits))

then it wont work. As log of -ve is not defined. So using o softmax activation, will overcome this problem.

This is my understanding, please correct me if Im wrong.

You can use rows and cols:

cout << "Width : " << src.cols << endl;
cout << "Height: " << src.rows << endl;

or size():

cout << "Width : " << src.size().width << endl;
cout << "Height: " << src.size().height << endl;

I prefer this as the best way of reversing a string using a for loop.

def reverse_a_string(str): 

    result=" "
    for i in range(len(str),1,-1):
        result= result+ str[i-1]
    return result

print reverse_a_string(input())

Approach: calculate keys to remove, mutate dict

Let's call keys the list/iterator of keys that you are given to remove. I'd do this:

keys_to_remove = set(keys).intersection(set(mydict.keys()))
for key in keys_to_remove:
    del mydict[key]

You calculate up front all the affected items and operate on them.

Approach: calculate keys to keep, make new dict with those keys

I prefer to create a new dictionary over mutating an existing one, so I would probably also consider this:

keys_to_keep = set(mydict.keys()) - set(keys)
new_dict = {k: v for k, v in mydict.iteritems() if k in keys_to_keep}

or:

keys_to_keep = set(mydict.keys()) - set(keys)
new_dict = {k: mydict[k] for k in keys_to_keep}

define this "decoratorize function" to generate customized decorator function:

def decoratorize(FUN, **kw):
    def foo(*args, **kws):
        return FUN(*args, **kws, **kw)
    return foo

use it this way:

    @decoratorize(FUN, arg1 = , arg2 = , ...)
    def bar(...):
        ...

You can just use the built-in function count follow by the groupby function

df.groupby(['col5','col2']).count()

Class methods, as the name suggests, are used to make changes to classes and not the objects. To make changes to classes, they will modify the class attributes(not object attributes), since that is how you update classes. This is the reason that class methods take the class(conventionally denoted by 'cls') as the first argument.

class A(object):
    m=54

    @classmethod
    def class_method(cls):
        print "m is %d" % cls.m

Static methods on the other hand, are used to perform functionalities that are not bound to the class i.e. they will not read or write class variables. Hence, static methods do not take classes as arguments. They are used so that classes can perform functionalities that are not directly related to the purpose of the class.

class X(object):
    m=54 #will not be referenced

    @staticmethod
    def static_method():
        print "Referencing/calling a variable or function outside this class. E.g. Some global variable/function."

dict.copy() is a shallow copy function for dictionary
id is built-in function that gives you the address of variable

First you need to understand "why is this particular problem is happening?"

In [1]: my_dict = {'a': [1, 2, 3], 'b': [4, 5, 6]}

In [2]: my_copy = my_dict.copy()

In [3]: id(my_dict)
Out[3]: 140190444167808

In [4]: id(my_copy)
Out[4]: 140190444170328

In [5]: id(my_copy['a'])
Out[5]: 140190444024104

In [6]: id(my_dict['a'])
Out[6]: 140190444024104

The address of the list present in both the dicts for key 'a' is pointing to same location.
Therefore when you change value of the list in my_dict, the list in my_copy changes as well.

Solution for data structure mentioned in the question:

In [7]: my_copy = {key: value[:] for key, value in my_dict.items()}

In [8]: id(my_copy['a'])
Out[8]: 140190444024176

Or you can use deepcopy as mentioned above.

Using np.delete is the fastest way to do it, if we know the indices of the elements that we want to remove. However, for completeness, let me add another way of "removing" array elements using a boolean mask created with the help of np.isin. This method allows us to remove the elements by specifying them directly or by their indices:

import numpy as np
a = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9])

Remove by indices:

indices_to_remove = [2, 3, 6]
a = a[~np.isin(np.arange(a.size), indices_to_remove)]

Remove by elements (don't forget to recreate the original a since it was rewritten in the previous line):

elements_to_remove = a[indices_to_remove]  # [3, 4, 7]
a = a[~np.isin(a, elements_to_remove)]

I would like to present a modified version of Vadim's solution. It helps to deal with asynchronous requests to write/modify json file. I know it wasn't a part of the original question but might be helpful for others.

In case of asynchronous file modification os.remove(filename) will raise FileNotFoundError if requests emerge frequently. To overcome this problem you can create temporary file with modified content and then rename it simultaneously replacing old version. This solution works fine both for synchronous and asynchronous cases.

import os, json, uuid

filename = 'data.json'
with open(filename, 'r') as f:
    data = json.load(f)
    data['id'] = 134 # <--- add `id` value.
    # add, remove, modify content

# create randomly named temporary file to avoid 
# interference with other thread/asynchronous request
tempfile = os.path.join(os.path.dirname(filename), str(uuid.uuid4()))
with open(tempfile, 'w') as f:
    json.dump(data, f, indent=4)

# rename temporary file replacing old file
os.rename(tempfile, filename)

If you are using the 'pylab' for interactive plotting you can set the labelsize at creation time with pylab.ylabel('Example', fontsize=40).

If you use pyplot programmatically you can either set the fontsize on creation with ax.set_ylabel('Example', fontsize=40) or afterwards with ax.yaxis.label.set_size(40).

It's also worth checking that you didn't modify somehow the path to your virtualenv.

In that case the first line in bin/pip (and the rest of the executables) would have an incorrect path.

You can either edit these files and fix the path or remove and install again the virtualenv.

You can do this with merge:

df_merged = df1.merge(df2, how='outer', left_index=True, right_index=True)

The keyword argument how='outer' keeps all indices from both frames, filling in missing indices with NaN. The left_index and right_index keyword arguments have the merge be done on the indices. If you get all NaN in a column after doing a merge, another troubleshooting step is to verify that your indices have the same dtypes.

The merge code above produces the following output for me:

                V1    V2
A 2012-01-01  12.0  15.0
  2012-02-01  14.0   NaN
  2012-03-01   NaN  21.0
B 2012-01-01  15.0  24.0
  2012-02-01   8.0   9.0
C 2012-01-01  17.0   NaN
  2012-02-01   9.0   NaN
D 2012-01-01   NaN   7.0
  2012-02-01   NaN  16.0

Put your class name on the mat-form-field element. This works for all inputs.

yes... This is for each loop in java.

Generally this loop is become useful when you are retrieving data or object from the database.

Syntex :

for(Object obj : Collection obj)
{
     //Code enter code here
}

Example :

for(User user : userList)
{
     System.out.println("USer NAme :" + user.name);
   // etc etc
}

This is for each loop.

it will incremental by automatically. one by one from collection to USer object data has been filled. and working.

use this code in Kotlin

fun makeCall(context: Context, mob: String) {
        try {
            val intent = Intent(Intent.ACTION_DIAL)

            intent.data = Uri.parse("tel:$mob")
            context.startActivity(intent)
        } catch (e: java.lang.Exception) {
            Toast.makeText(context,
                "Unable to call at this time", Toast.LENGTH_SHORT).show()
        }
    }

Have a look at File > Preferences > Keyboard Shortcuts (or Ctrl+K Ctrl+S)

Search for cursorColumnSelectDown or cursorColumnSelectUp which will give you the relevent keyboard shortcut. For me it is Shift+Alt+Down/Up Arrow

#footer{
position: fixed; 
bottom: 0;
}

http://codepen.io/smarty_tech/pen/grzMZr

I Search this problem for days.... I hope it will be usefull

FINAL SOLUTION: (I assume that you have installed Oracle-JDK and ANDROID)

open /etc/environment with

 sudo nano /etc/environment


PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/shoniisra/Android/Sdk/tools:/home/shoniisra/Android/Sdk/platform-tools:/home/shoniisra/Android/Sdk/build-tools:/home/shoniisra/Android/Sdk:/home/shoniisra/android-studio/bin"
JAVA_HOME="/home/shoniisra/java/jdk1.8.0_231"
ANDROID_HOME="/home/shoniisra/Android/Sdk/build-tools/29.0.2"
ANDROID_SDK_ROOT="/home/shoniisra/Android/Sdk"
ANT_HOME="/home/shoniisra/ant/apache-ant-1.9.14"

Save and exit (CTRL+o CTRL+X)

Reload file source /etc/environment

If you recently installed Android you should accept some licences

cd ~/Android/Sdk/tools/bin/

Execute sdkmanager:

./sdkmanager --licenses

Then Accept all, and Finally generate your APK

cd {yourproyect}
sudo ionic cordova build android

extension String{

    func widthWithConstrainedHeight(_ height: CGFloat, font: UIFont) -> CGFloat {
        let constraintRect = CGSize(width: CGFloat.greatestFiniteMagnitude, height: height)

        let boundingBox = self.boundingRect(with: constraintRect, options: NSStringDrawingOptions.usesLineFragmentOrigin, attributes: [NSFontAttributeName: font], context: nil)

        return ceil(boundingBox.width)
    }

    func heightWithConstrainedWidth(_ width: CGFloat, font: UIFont) -> CGFloat? {
        let constraintRect = CGSize(width: width, height: CGFloat.greatestFiniteMagnitude)
        let boundingBox = self.boundingRect(with: constraintRect, options: NSStringDrawingOptions.usesLineFragmentOrigin, attributes: [NSFontAttributeName: font], context: nil)

        return ceil(boundingBox.height)
    }

}

I had the same problem.

Solution: I put modal's DIV in the uppermost scope of main HTML (due to using Jinja2 blocks my modal got nested somewhere in the middle of some other DIV.

Pretty late on the answer, but if you have a TextView that you're showing the phone number in, then you don't need to deal with intents at all, you can just use the XML attribute android:autoLink="phone" and the OS will automatically initiate an ACTION_DIAL Intent.

to fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the
deserialized type so that it is a normal .NET type (e.g. not a primitive type like
integer, not a collection type like an array or List) that can be deserialized from a
JSON object.`

The whole message indicates that it is possible to serialize to a List object, but the input must be a JSON list. This means that your JSON must contain

"accounts" : [{<AccountObjectData}, {<AccountObjectData>}...],

Where AccountObject data is JSON representing your Account object or your Badge object

What it seems to be getting currently is

"accounts":{"github":"sergiotapia"}

Where accounts is a JSON object (denoted by curly braces), not an array of JSON objects (arrays are denoted by brackets), which is what you want. Try

"accounts" : [{"github":"sergiotapia"}]

The top answer is flawed in my opinion. Hopefully, no one is mass importing all of pandas into their namespace with from pandas import *. Also, the map method should be reserved for those times when passing it a dictionary or Series. It can take a function but this is what apply is used for.

So, if you must use the above approach, I would write it like this

df["A1"], df["A2"] = zip(*df["a"].apply(calculate))

There's actually no reason to use zip here. You can simply do this:

df["A1"], df["A2"] = calculate(df['a'])

This second method is also much faster on larger DataFrames

df = pd.DataFrame({'a': [1,2,3] * 100000, 'b': [2,3,4] * 100000})

DataFrame created with 300,000 rows

%timeit df["A1"], df["A2"] = calculate(df['a'])
2.65 ms ± 92.4 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

%timeit df["A1"], df["A2"] = zip(*df["a"].apply(calculate))
159 ms ± 5.24 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)

60x faster than zip

In general, avoid using apply

Apply is generally not much faster than iterating over a Python list. Let's test the performance of a for-loop to do the same thing as above

%%timeit
A1, A2 = [], []
for val in df['a']:
    A1.append(val**2)
    A2.append(val**3)

df['A1'] = A1
df['A2'] = A2

298 ms ± 7.14 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)

So this is twice as slow which isn't a terrible performance regression, but if we cythonize the above, we get much better performance. Assuming, you are using ipython:

%load_ext cython

%%cython
cpdef power(vals):
    A1, A2 = [], []
    cdef double val
    for val in vals:
        A1.append(val**2)
        A2.append(val**3)

    return A1, A2

%timeit df['A1'], df['A2'] = power(df['a'])
72.7 ms ± 2.16 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)

Directly assigning without apply

You can get even greater speed improvements if you use the direct vectorized operations.

%timeit df['A1'], df['A2'] = df['a'] ** 2, df['a'] ** 3
5.13 ms ± 320 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

This takes advantage of NumPy's extremely fast vectorized operations instead of our loops. We now have a 30x speedup over the original.

The simplest speed test with apply

The above example should clearly show how slow apply can be, but just so its extra clear let's look at the most basic example. Let's square a Series of 10 million numbers with and without apply

s = pd.Series(np.random.rand(10000000))

%timeit s.apply(calc)
3.3 s ± 57.4 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)

Without apply is 50x faster

%timeit s ** 2
66 ms ± 2 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)

Extract the element:

var buttonMatcherRegExp=/<a[\s\S]*?>[\s\S]*?<\/a>/;
htmlStr=string.match( buttonMatcherRegExp )[0]

Then use jQuery to parse and extract the bit you want:

$(htmlStr).attr('style') 

If you are using Spring JDBC, you can use Spring's GeneratedKeyHolder class to get the inserted ID.

See this answer... How to get inserted id using Spring Jdbctemplate.update(String sql, obj...args)

For everyone who looks example that works with Swift 2.2, Abizern code with modern do try catch handle of error

func databaseURL() -> NSURL? {

    let fileManager = NSFileManager.defaultManager()

    let urls = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)

    if let documentDirectory:NSURL = urls.first { // No use of as? NSURL because let urls returns array of NSURL
        // This is where the database should be in the documents directory
        let finalDatabaseURL = documentDirectory.URLByAppendingPathComponent("OurFile.plist")

        if finalDatabaseURL.checkResourceIsReachableAndReturnError(nil) {
            // The file already exists, so just return the URL
            return finalDatabaseURL
        } else {
            // Copy the initial file from the application bundle to the documents directory
            if let bundleURL = NSBundle.mainBundle().URLForResource("OurFile", withExtension: "plist") {

                do {
                    try fileManager.copyItemAtURL(bundleURL, toURL: finalDatabaseURL)
                } catch let error as NSError  {// Handle the error
                    print("Couldn't copy file to final location! Error:\(error.localisedDescription)")
                }

            } else {
                print("Couldn't find initial database in the bundle!")
            }
        }
    } else {
        print("Couldn't get documents directory!")
    }

    return nil
}

Update I've missed that new swift 2.0 have guard(Ruby unless analog), so with guard it is much shorter and more readable

func databaseURL() -> NSURL? {

let fileManager = NSFileManager.defaultManager()
let urls = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)

// If array of path is empty the document folder not found
guard urls.count != 0 else {
    return nil
}

let finalDatabaseURL = urls.first!.URLByAppendingPathComponent("OurFile.plist")
// Check if file reachable, and if reacheble just return path
guard finalDatabaseURL.checkResourceIsReachableAndReturnError(nil) else {
    // Check if file is exists in bundle folder
    if let bundleURL = NSBundle.mainBundle().URLForResource("OurFile", withExtension: "plist") {
        // if exist we will copy it
        do {
            try fileManager.copyItemAtURL(bundleURL, toURL: finalDatabaseURL)
        } catch let error as NSError { // Handle the error
            print("File copy failed! Error:\(error.localizedDescription)")
        }
    } else {
        print("Our file not exist in bundle folder")
        return nil
    }
    return finalDatabaseURL
}
return finalDatabaseURL 
}

This is the way it worked for me, because with other methods the form was sent empty:

<form name="yourform" id="yourform" method="POST" action="yourpage.html">
    <input type=hidden name="data" value="yourdata">
    <input type="submit" id="send" name="send" value="Send">
</form>
<script>            
    document.addEventListener("DOMContentLoaded", function(event) {
            document.createElement('form').submit.call(document.getElementById('yourform'));
            });         
</script>

@jason-mccreary is totally right. Besides I recommend you this code to get more info in case of malfunction:

$rest = curl_exec($crl);

if ($rest === false)
{
    // throw new Exception('Curl error: ' . curl_error($crl));
    print_r('Curl error: ' . curl_error($crl));
}

curl_close($crl);
print_r($rest);

EDIT 1

To debug you can set CURLOPT_HEADER to true to check HTTP response with firebug::net or similar.

curl_setopt($crl, CURLOPT_HEADER, true);

EDIT 2

About Curl error: SSL certificate problem, verify that the CA cert is OK try adding this headers (just to debug, in a production enviroment you should keep these options in true):

curl_setopt($crl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($crl, CURLOPT_SSL_VERIFYPEER, false);

First, we need to filter the XML so as to parse that change objects become array

//catch xml
$xmlElement = file_get_contents ('php://input');
//change become array
$Data = (array)simplexml_load_string($xmlElement);
//and see
print_r($Data);

Traversal over the large map entrySet() is much better than the keySet(). Check this tutorial how they optimise the traversal over the large object with the help of entrySet() and how it helps for performance tuning.

You should have grep like this:

$ grep 'string1' file | grep 'string2'

function el(id) {
  return document.getElementById(id);
}

if (el('one') || el('two') || el('three')) { 
  alert('yes');

} else if (el('four')) {
  alert('no');
}

You can define attribute as BINARY or use INSTR or STRCMP to perform your search.

Try this:

    /// <summary>
    /// returns the first MAC address from where is executed 
    /// </summary>
    /// <param name="flagUpOnly">if sets returns only the nic on Up status</param>
    /// <returns></returns>
    public static string[] getOperationalMacAddresses(Boolean flagUpOnly)
    {
        string[] macAddresses = new string[NetworkInterface.GetAllNetworkInterfaces().Count()];

        int i = 0;
        foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
        {
            if (nic.OperationalStatus == OperationalStatus.Up || !flagUpOnly)
            {
                macAddresses[i] += ByteToHex(nic.GetPhysicalAddress().GetAddressBytes());
                //break;
                i++;
            }
        }
        return macAddresses;
    }

I've used this little utility whenever the need arises: http://www.analogx.com/contents/download/network/pmapper/freeware.htm

The last time this utility was updated was in 2009. I noticed on my Win10 machine, it hangs for a few seconds when opening new windows sometimes. Other then that UI glitch, it still does its job fine.

Off the top of my head, no.

I think the best you could do is something like this:

def loop(f,n):
    for i in xrange(n): f()

loop(lambda: <insert expression here>, 5)

But I think you can just live with the extra i variable.

Here is the option to use the _ variable, which in reality, is just another variable.

for _ in range(n):
    do_something()

Note that _ is assigned the last result that returned in an interactive python session:

>>> 1+2
3
>>> _
3

For this reason, I would not use it in this manner. I am unaware of any idiom as mentioned by Ryan. It can mess up your interpreter.

>>> for _ in xrange(10): pass
...
>>> _
9
>>> 1+2
3
>>> _
9

And according to Python grammar, it is an acceptable variable name:

identifier ::= (letter|"_") (letter | digit | "_")*

This working on SQL_Server_2008 R2

Select * 
from Product_sales
where From_date 
between '2013-01-03' and '2013-01-09'

As others have indicated, bash does not have built-in floating-point operators.

You can implement floating-point in bash, even without using calculator programs like bc and awk, or any external programs for that matter.

I'm doing exactly this in my project, shellmath, in three basic steps:

1. Break the numbers down into their integer and fractional parts
2. Use the built-in integer operators to process the parts separately while being careful about place-value and carrying
3. Recombine the results

As a teaser, I've added a demo script that calculates e using its Taylor series centered at x=0.

Please check it out if you have a moment. I welcome your feedback!

You can use the ExceptionUtils.getStackTrace(Throwable t); from Apache Commons 3 class org.apache.commons.lang3.exception.ExceptionUtils.

http://commons.apache.org/proper/commons-lang/

ExceptionUtils.getStackTrace(Throwable t)

Code example:

try {

  // your code here

} catch(Exception e) {
  String s = ExceptionUtils.getStackTrace(e);
}

If you need that each div will have its own toggle and don't want clicks to affect other divs, do this:

Here's what I did to solve this...

<div [ngClass]="{'teaser': !teaser_1 }" (click)="teaser_1=!teaser_1">
...content...
</div>

<div [ngClass]="{'teaser': !teaser_2 }" (click)="teaser_2=!teaser_2">
...content...
</div>

<div [ngClass]="{'teaser': !teaser_3 }" (click)="teaser_3=!teaser_3">
...content...
</div>

it requires custom numbering which sucks, but it works.

I am trying with the below. This seems to be working fine. Are there any limitations to this approach? Please confirm.

var now=new Date();                         // Sun Apr 02 2017 2:00:00 GMT+1000 (AEST)
var gmtRe = /GMT([\-\+]?\d{4})/;
var tz = gmtRe.exec(now)[1];               // +1000
var hour=tz/100;                           // 10
var min=tz%100;                            // 0
now.setHours(now.getHours()-hour);
now.setMinutes(now.getMinutes()-min);      // Sat Apr 01 2017 16:00:00 GMT

I feel like the solution is somewhat a bit simpler with the input event:

var typingTimer;
var doneTypingInterval = 500;

$("#myInput").on("input", function () {
    window.clearTimeout(typingTimer);
    typingTimer = window.setTimeout(doneTyping, doneTypingInterval);
});

function doneTyping () {
    // code here
}

I bumped the answer that pointed me in the right direction, but...

For those who are using Visual C++:

If you need to turn off auto-increment of the version, you can change this value in the "AssemblyInfo.cpp" file (all CLR projects have one). Give it a real version number without the asterisk and it will work the way you want it to.

Just don't forget to implement your own version-control on your assembly!

To do this, I had to come up with an intermediate data structure:

class KeyDataPoint {
    String key;
    DateTime timestamp;
    Number data;
    // obvious constructor and getters
}

With this in place, the approach is to "flatten" each MultiDataPoint into a list of (timestamp, key, data) triples and stream together all such triples from the list of MultiDataPoint.

Then, we apply a groupingBy operation on the string key in order to gather the data for each key together. Note that a simple groupingBy would result in a map from each string key to a list of the corresponding KeyDataPoint triples. We don't want the triples; we want DataPoint instances, which are (timestamp, data) pairs. To do this we apply a "downstream" collector of the groupingBy which is a mapping operation that constructs a new DataPoint by getting the right values from the KeyDataPoint triple. The downstream collector of the mapping operation is simply toList which collects the DataPoint objects of the same group into a list.

Now we have a Map<String, List<DataPoint>> and we want to convert it to a collection of DataSet objects. We simply stream out the map entries and construct DataSet objects, collect them into a list, and return it.

The code ends up looking like this:

Collection<DataSet> convertMultiDataPointToDataSet(List<MultiDataPoint> multiDataPoints) {
    return multiDataPoints.stream()
        .flatMap(mdp -> mdp.getData().entrySet().stream()
                           .map(e -> new KeyDataPoint(e.getKey(), mdp.getTimestamp(), e.getValue())))
        .collect(groupingBy(KeyDataPoint::getKey,
                    mapping(kdp -> new DataPoint(kdp.getTimestamp(), kdp.getData()), toList())))
        .entrySet().stream()
        .map(e -> new DataSet(e.getKey(), e.getValue()))
        .collect(toList());
}

I took some liberties with constructors and getters, but I think they should be obvious.

Something like:

>>> bytes.fromhex('4a4b4c').decode('utf-8')
'JKL'

Just put the actual encoding you are using.

Just in case someone wants to do it for exact matches of strings, you can use the -w flag in grep - w for whole. That is, for example if you want to delete the lines that have number 11, but keep the lines with number 111:

-bash-4.1$ head file
1
11
111

-bash-4.1$ grep -v "11" file
1

-bash-4.1$ grep -w -v "11" file
1
111

It also works with the -f flag if you want to exclude several exact patterns at once. If "blacklist" is a file with several patterns on each line that you want to delete from "file":

grep -w -v -f blacklist file

My guess is that RAND_MAX is equal to INT_MAX and so you're overflowing it to a negative.

Just do this:

r = ((double) rand() / (RAND_MAX)) + 1;

Or even better, use C++11's random number generators.

You can use set with the /p argument:

SET /P variable=[promptString]

The /P switch allows you to set the value of a variable to a line of input entered by the user. Displays the specified promptString before reading the line of input. The promptString can be empty.

So, simply use something like

set /p Input=Enter some text: 

Later you can use that variable as argument to a command:

myCommand %Input%

Be careful though, that if your input might contain spaces it's probably a good idea to quote it:

myCommand "%Input%"

just a note: CPLUS_INCLUDE_PATH and C_INCLUDE_PATH are not the equivalent of LD_LIBRARY_PATH. LD_LIBRARY_PATH serves the ld (the dynamic linker at runtime) whereas the equivalent of the former two that serves your C/C++ compiler with the location of libraries is LIBRARY_PATH.

SelectListItem has a Selected property. If you are creating the SelectListItems dynamically, you can just set the one you want as Selected = true and it will then be the default.

SelectListItem defaultItem = new SelectListItem()
{
   Value = 1,
   Text = "Default Item",
   Selected = true
};

The default value of the argument must be a constant expression. It can't be a variable or a function call.

If you need this functionality however:

function foo($foo, $bar = false)
{
    if(!$bar)
    {
        $bar = $foo;
    }
}

Assuming $bar isn't expected to be a boolean of course.

just remove s from the permission you are using sss you have to use ss

I've found built-in such method named from which contains additional string functions to the standard header .

Here's the relevant signatures :

int  strcasecmp(const char *, const char *);
int  strncasecmp(const char *, const char *, size_t);

I also found it's synonym in xnu kernel (osfmk/device/subrs.c) and it's implemented in the following code, so you wouldn't expect to have any change of behavior in number compared to the original strcmp function.

tolower(unsigned char ch) {
    if (ch >= 'A' && ch <= 'Z')
        ch = 'a' + (ch - 'A');
    return ch;
 }

int strcasecmp(const char *s1, const char *s2) {
    const unsigned char *us1 = (const u_char *)s1,
                        *us2 = (const u_char *)s2;

    while (tolower(*us1) == tolower(*us2++))
        if (*us1++ == '\0')
            return (0);
    return (tolower(*us1) - tolower(*--us2));
}

Since SQL Developer 3, it's pretty straightforward (they could've made it easier).

1. Go to «View → Data Modeler → Browser». The browser will show up as one of the tabs along the left-hand side.
2. Click on the «Browser» tab, expand the design (probably called Untitled_1), right-click «Relational Models» and select «New Relational Model».
3. Right click on the newly created relational model (probably Relational_1) and select «Show».
4. Then just drag the tables you want (from e.g. the «Connections» tab) onto the model.  Note when you click on the first table in the Connections tab, SQLDeveloper opens that table in the right: select all the tables from the left, then ensure the Relational_1 tab (or whatever name) is the active one in the rhs before you drag them over, because it has probably switched to one of the tables you clicked in the lhs.

Linux uses the inotify package to observe filesystem events, individual files or directories.

Since React / Angular hot-reloads and recompiles files on save it needs to keep track of all project's files. Increasing the inotify watch limit should hide the warning messages.

You could try editing

# insert the new value into the system config
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

# check that the new value was applied
cat /proc/sys/fs/inotify/max_user_watches

# config variable name (not runnable)
fs.inotify.max_user_watches=524288

Making it invisible with visibility still makes it use up space. Rather try set the display to none to make it invisible, and then set the display to block to make it visible.

Long term, you will be able to use the ResizeObserver.

new ResizeObserver(callback).observe(element);

Unfortunately it is not currently supported by default in many browsers.

In the mean time, you can use function like the following. Since, the majority of element size changes will come from the window resizing or from changing something in the DOM. You can listen to window resizing with the window's resize event and you can listen to DOM changes using MutationObserver.

Here's an example of a function that will call you back when the size of the provided element changes as a result of either of those events:

var onResize = function(element, callback) {
  if (!onResize.watchedElementData) {
    // First time we are called, create a list of watched elements
    // and hook up the event listeners.
    onResize.watchedElementData = [];

    var checkForChanges = function() {
      onResize.watchedElementData.forEach(function(data) {
        if (data.element.offsetWidth !== data.offsetWidth ||
            data.element.offsetHeight !== data.offsetHeight) {
          data.offsetWidth = data.element.offsetWidth;
          data.offsetHeight = data.element.offsetHeight;
          data.callback();
        }
      });
    };

    // Listen to the window's size changes
    window.addEventListener('resize', checkForChanges);

    // Listen to changes on the elements in the page that affect layout 
    var observer = new MutationObserver(checkForChanges);
    observer.observe(document.body, { 
      attributes: true,
      childList: true,
      characterData: true,
      subtree: true 
    });
  }

  // Save the element we are watching
  onResize.watchedElementData.push({
    element: element,
    offsetWidth: element.offsetWidth,
    offsetHeight: element.offsetHeight,
    callback: callback
  });
};

I came across this thread while trying to clear the date already set. Attempting:

$('#datepicker').val('').datepicker('update');

produced:

TypeError: t.dpDiv is undefined 
https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js -- Line 8

Thinking that perhaps one needed to include the original Datepicker for bootstrap removes the error, but then causes the original Datepicker widget to appear! - so that's obviously wrong and not needed.

Looking further, the crash in jqueryui is in:

    /* Generate the date picker content. */
_updateDatepicker: function(inst) {
    this.maxRows = 4; //Reset the max number of rows being displayed (see #7043)
    datepicker_instActive = inst; // for delegate hover events
    inst.dpDiv.empty().append(this._generateHTML(inst));
    this._attachHandlers(inst);

and inst.pdDiv does not exist.

Investigating further - I realized that what was needed was:

        $formControl = $duedate.find("input");
        $formControl.val('');
        $formControl.removeData();

Which solved my problem. Note I also needed the $formControl.removeData() otherwise the state of the widget would not be reinitialized to the initial state.

I hope this helps someone else. :-)

Reference article: Show red color border for invalid input fields angualrjs

I used ng-class on all input fields.like below

<input type="text" ng-class="{submitted:newEmployee.submitted}" placeholder="First Name" data-ng-model="model.firstName" id="FirstName" name="FirstName" required/>

when I click on save button I am changing newEmployee.submitted value to true(you can check it in my question). So when I click on save, a class named submitted gets added to all input fields(there are some other classes initially added by angularjs).

So now my input field contains classes like this

class="ng-pristine ng-invalid submitted"

now I am using below css code to show red border on all invalid input fields(after submitting the form)

input.submitted.ng-invalid
{
  border:1px solid #f00;
}

Thank you !!

Update:

We can add the ng-class at the form element instead of applying it to all input elements. So if the form is submitted, a new class(submitted) gets added to the form element. Then we can select all the invalid input fields using the below selector

form.submitted .ng-invalid
{
    border:1px solid #f00;
}

If the keystore is for tomcat then, after creating the keystore with the above answers, you must add a final step to create the "tomcat" alias for the key:

keytool -changealias -alias "1" -destalias "tomcat" -keystore keystore-file.jks

You can check the result with:

keytool -list -keystore keystore-file.jks -v

It can be done with simple Makefile:

sleep%:
        sleep $(subst sleep,,$@)
        @echo $@ done.

Use -j option.

$ make -j sleep3 sleep2 sleep1
sleep 3
sleep 2
sleep 1
sleep1 done.
sleep2 done.
sleep3 done.

Without -j option it executes in serial.

$ make -j sleep3 sleep2 sleep1
sleep 3
sleep3 done.
sleep 2
sleep2 done.
sleep 1
sleep1 done.

You can also do dry run with `-n' option.

$ make -j -n sleep3 sleep2 sleep1
sleep 3
sleep 2
sleep 1

I think the problem is that you are using type="text" instead of textarea. What you want is:

<textarea class="span6" rows="3" placeholder="What's up?" required></textarea>

To clarify, a type="text" will always be one row, where-as a textarea can be multiple.

This is actually javascript but related/relevant because .querySelectorAll targets by CSS syntax:

var i_will_target_self = document.querySelectorAll("ul.menu li a#example")

this example uses css to target links in a menu with id = "example"

that creates a variable which is a collection of the elements we want to change, but we still have actually change them by setting the new target ("_blank"):

for (var i = 0; i < 5; i++) {
i_will_target_self[i].target = "_blank";
}

That code assumes that there are 5 or less elements. That can be changed easily by changing the phrase "i < 5."

read more here: http://xahlee.info/js/js_get_elements.html

Yes... by the time the regex compiler sees the pattern you've given it, it sees only a single backslash (since Java's lexer has turned the double backwhack into a single one). You need to replace "\\\\" with "\\\\", believe it or not! Java really needs a good raw string syntax.

I do it on the server side, at the begining of my init file, works like a charm and you don't have to do anything in angular or existing php code:

if ($_SERVER['REQUEST_METHOD'] == 'POST' && empty($_POST))
    $_POST = json_decode(file_get_contents('php://input'), true);

Restartable mode (/Z) has to do with a partially-copied file. With this option, should the copy be interrupted while any particular file is partially copied, the next execution of robocopy can pick up where it left off rather than re-copying the entire file.

That option could be useful when copying very large files over a potentially unstable connection.

Backup mode (/B) has to do with how robocopy reads files from the source system. It allows the copying of files on which you might otherwise get an access denied error on either the file itself or while trying to copy the file's attributes/permissions. You do need to be running in an Administrator context or otherwise have backup rights to use this flag.

If you need only key comparison:

 _.reduce(a, function(result, value, key) {
     return b[key] === undefined ? key : []
  }, []);

Try this.

<asp:Button id="myButton" runat="server" style="display:none" Text="Click Me" />

<script type="text/javascript">
    function ShowButton() {
        var buttonID = '<%= myButton.ClientID %>';
        var button = document.getElementById(buttonID);
        if(button) { button.style.display = 'inherit'; }
    }
</script>

Don't use server-side code to do this because that would require a postback. Instead of using Visibility="false", you can just set a CSS property that hides the button. Then, in javascript, switch that property back whenever you want to show the button again.

The ClientID is used because it can be different from the server ID if the button is inside a Naming Container control. These include Panels of various sorts.

In WPF apps This code working perfectly

private void txt1_KeyDown(object sender, KeyEventArgs e)
  {
     if (Keyboard.IsKeyDown(Key.Enter) )
         {
              Button_Click(this, new RoutedEventArgs());
         }
   }

IO manipulators are what you need. setw, in particular. Here's an example from the reference page:

// setw example
#include <iostream>
#include <iomanip>
using namespace std;

int main () {
  cout << setw (10);
  cout << 77 << endl;
  return 0;
}

Justifying the field to the left and right is done with the left and right manipulators.

Also take a look at setfill. Here's a more complete tutorial on formatting C++ output with io manipulators.

System.Convert.IsDbNull][1](table.rows[0][0]);

IIRC, the (table.rows[0][0] == null) won't work, as DbNull.Value != null;

To understand what yield does, you must understand what generators are. And before you can understand generators, you must understand iterables.

Iterables

When you create a list, you can read its items one by one. Reading its items one by one is called iteration:

>>> mylist = [1, 2, 3]
>>> for i in mylist:
...    print(i)
1
2
3

mylist is an iterable. When you use a list comprehension, you create a list, and so an iterable:

>>> mylist = [x*x for x in range(3)]
>>> for i in mylist:
...    print(i)
0
1
4

Everything you can use "for... in..." on is an iterable; lists, strings, files...

These iterables are handy because you can read them as much as you wish, but you store all the values in memory and this is not always what you want when you have a lot of values.

Generators

Generators are iterators, a kind of iterable you can only iterate over once. Generators do not store all the values in memory, they generate the values on the fly:

>>> mygenerator = (x*x for x in range(3))
>>> for i in mygenerator:
...    print(i)
0
1
4

It is just the same except you used () instead of []. BUT, you cannot perform for i in mygenerator a second time since generators can only be used once: they calculate 0, then forget about it and calculate 1, and end calculating 4, one by one.

Yield

yield is a keyword that is used like return, except the function will return a generator.

>>> def createGenerator():
...    mylist = range(3)
...    for i in mylist:
...        yield i*i
...
>>> mygenerator = createGenerator() # create a generator
>>> print(mygenerator) # mygenerator is an object!
<generator object createGenerator at 0xb7555c34>
>>> for i in mygenerator:
...     print(i)
0
1
4

Here it's a useless example, but it's handy when you know your function will return a huge set of values that you will only need to read once.

To master yield, you must understand that when you call the function, the code you have written in the function body does not run. The function only returns the generator object, this is a bit tricky :-)

Then, your code will continue from where it left off each time for uses the generator.

Now the hard part:

The first time the for calls the generator object created from your function, it will run the code in your function from the beginning until it hits yield, then it'll return the first value of the loop. Then, each subsequent call will run another iteration of the loop you have written in the function and return the next value. This will continue until the generator is considered empty, which happens when the function runs without hitting yield. That can be because the loop has come to an end, or because you no longer satisfy an "if/else".

Your code explained

Generator:

# Here you create the method of the node object that will return the generator
def _get_child_candidates(self, distance, min_dist, max_dist):

    # Here is the code that will be called each time you use the generator object:

    # If there is still a child of the node object on its left
    # AND if the distance is ok, return the next child
    if self._leftchild and distance - max_dist < self._median:
        yield self._leftchild

    # If there is still a child of the node object on its right
    # AND if the distance is ok, return the next child
    if self._rightchild and distance + max_dist >= self._median:
        yield self._rightchild

    # If the function arrives here, the generator will be considered empty
    # there is no more than two values: the left and the right children

Caller:

# Create an empty list and a list with the current object reference
result, candidates = list(), [self]

# Loop on candidates (they contain only one element at the beginning)
while candidates:

    # Get the last candidate and remove it from the list
    node = candidates.pop()

    # Get the distance between obj and the candidate
    distance = node._get_dist(obj)

    # If distance is ok, then you can fill the result
    if distance <= max_dist and distance >= min_dist:
        result.extend(node._values)

    # Add the children of the candidate in the candidate's list
    # so the loop will keep running until it will have looked
    # at all the children of the children of the children, etc. of the candidate
    candidates.extend(node._get_child_candidates(distance, min_dist, max_dist))

return result

This code contains several smart parts:

• The loop iterates on a list, but the list expands while the loop is being iterated :-) It's a concise way to go through all these nested data even if it's a bit dangerous since you can end up with an infinite loop. In this case, candidates.extend(node._get_child_candidates(distance, min_dist, max_dist)) exhaust all the values of the generator, but while keeps creating new generator objects which will produce different values from the previous ones since it's not applied on the same node.

• The extend() method is a list object method that expects an iterable and adds its values to the list.

Usually we pass a list to it:

>>> a = [1, 2]
>>> b = [3, 4]
>>> a.extend(b)
>>> print(a)
[1, 2, 3, 4]

But in your code, it gets a generator, which is good because:

1. You don't need to read the values twice.
2. You may have a lot of children and you don't want them all stored in memory.

And it works because Python does not care if the argument of a method is a list or not. Python expects iterables so it will work with strings, lists, tuples, and generators! This is called duck typing and is one of the reasons why Python is so cool. But this is another story, for another question...

You can stop here, or read a little bit to see an advanced use of a generator:

Controlling a generator exhaustion

>>> class Bank(): # Let's create a bank, building ATMs
...    crisis = False
...    def create_atm(self):
...        while not self.crisis:
...            yield "$100"
>>> hsbc = Bank() # When everything's ok the ATM gives you as much as you want
>>> corner_street_atm = hsbc.create_atm()
>>> print(corner_street_atm.next())
$100
>>> print(corner_street_atm.next())
$100
>>> print([corner_street_atm.next() for cash in range(5)])
['$100', '$100', '$100', '$100', '$100']
>>> hsbc.crisis = True # Crisis is coming, no more money!
>>> print(corner_street_atm.next())
<type 'exceptions.StopIteration'>
>>> wall_street_atm = hsbc.create_atm() # It's even true for new ATMs
>>> print(wall_street_atm.next())
<type 'exceptions.StopIteration'>
>>> hsbc.crisis = False # The trouble is, even post-crisis the ATM remains empty
>>> print(corner_street_atm.next())
<type 'exceptions.StopIteration'>
>>> brand_new_atm = hsbc.create_atm() # Build a new one to get back in business
>>> for cash in brand_new_atm:
...    print cash
$100
$100
$100
$100
$100
$100
$100
$100
$100
...

Note: For Python 3, useprint(corner_street_atm.__next__()) or print(next(corner_street_atm))

It can be useful for various things like controlling access to a resource.

Itertools, your best friend

The itertools module contains special functions to manipulate iterables. Ever wish to duplicate a generator? Chain two generators? Group values in a nested list with a one-liner? Map / Zip without creating another list?

Then just import itertools.

An example? Let's see the possible orders of arrival for a four-horse race:

>>> horses = [1, 2, 3, 4]
>>> races = itertools.permutations(horses)
>>> print(races)
<itertools.permutations object at 0xb754f1dc>
>>> print(list(itertools.permutations(horses)))
[(1, 2, 3, 4),
 (1, 2, 4, 3),
 (1, 3, 2, 4),
 (1, 3, 4, 2),
 (1, 4, 2, 3),
 (1, 4, 3, 2),
 (2, 1, 3, 4),
 (2, 1, 4, 3),
 (2, 3, 1, 4),
 (2, 3, 4, 1),
 (2, 4, 1, 3),
 (2, 4, 3, 1),
 (3, 1, 2, 4),
 (3, 1, 4, 2),
 (3, 2, 1, 4),
 (3, 2, 4, 1),
 (3, 4, 1, 2),
 (3, 4, 2, 1),
 (4, 1, 2, 3),
 (4, 1, 3, 2),
 (4, 2, 1, 3),
 (4, 2, 3, 1),
 (4, 3, 1, 2),
 (4, 3, 2, 1)]

Understanding the inner mechanisms of iteration

Iteration is a process implying iterables (implementing the __iter__() method) and iterators (implementing the __next__() method). Iterables are any objects you can get an iterator from. Iterators are objects that let you iterate on iterables.

There is more about it in this article about how for loops work.

There are security flaws to using preg_replace(), if you get the payload from user input [or other untrusted sources]. PHP executes the regular expression with eval(). If the incoming string isn't properly sanitized, your application risks being subjected to code injection.

In my own application, instead of bothering sanitizing the input (and as I only deal with short strings), I instead made a slightly more processor intensive function, though which is secure, since it doesn't eval() anything.

function secureRip(string $str): string { /* Rips all whitespace securely. */
  $arr = str_split($str, 1);
  $retStr = '';
  foreach ($arr as $char) {
    $retStr .= trim($char);
  }
  return $retStr;
}

Its probably due to a version conflict, try to run this, it will remove the older pip somehow.

sudo apt remove python pip

I think the question is a little bit fuzzy - for example, it can be interpreted as a question about best practices in programming loops with if inside. So, I'll try to answer this question with this particular interpretation.

If you have if inside a loop, then in most cases you'd like to know how the loop has ended - was it "broken" by the if or was it ended "naturally"? So, your sample code can be modified in this way:

bool intMaxFound = false;
for (size = 0; size < HAY_MAX; size++)
{
  // wait for hay until EOF
  printf("\nhaystack[%d] = ", size);
  int straw = GetInt();
  if (straw == INT_MAX)
     {intMaxFound = true; break;}

  // add hay to stack
  haystack[size] = straw;
}
if (intMaxFound)
{
  // ... broken
}
else
{
  // ... ended naturally
}

The problem with this code is that the if statement is buried inside the loop body, and it takes some effort to locate it and understand what it does. A more clear (even without the break statement) variant will be:

bool intMaxFound = false;
for (size = 0; size < HAY_MAX && !intMaxFound; size++)
{
  // wait for hay until EOF
  printf("\nhaystack[%d] = ", size);
  int straw = GetInt();
  if (straw == INT_MAX)
     {intMaxFound = true; continue;}

  // add hay to stack
  haystack[size] = straw;
}
if (intMaxFound)
{
  // ... broken
}
else
{
  // ... ended naturally
}

In this case you can clearly see (just looking at the loop "header") that this loop can end prematurely. If the loop body is a multi-page text, written by somebody else, then you'd thank its author for saving your time.

UPDATE:

Thanks to SO - it has just suggested the already answered question about crash of the AT&T phone network in 1990. It's about a risky decision of C creators to use a single reserved word break to exit from both loops and switch.

Anyway this interpretation doesn't follow from the sample code in the original question, so I'm leaving my answer as it is.

The following small profile worked for me. I needed such a configuration for CheckStyle, which I put into the config directory in the root of the project, so I can run it from the main module and from submodules.

<profile>
    <id>root-dir</id>
    <activation>
        <file>
            <exists>${project.basedir}/../../config/checkstyle.xml</exists>
        </file>
    </activation>
    <properties>
        <project.config.path>${project.basedir}/../config</project.config.path>
    </properties>
</profile>

It won't work for nested modules, but I'm sure it can be modified for that using several profiles with different exists's. (I have no idea why there should be "../.." in the verification tag and just ".." in the overriden property itself, but it works only in that way.)

Probably you use Microsoft SQL Server which support Common Table Expressions (CTE) (see http://msdn.microsoft.com/en-us/library/ms190766.aspx) which are very friendly for query optimization. So I suggest you my favor construction:

WITH GetNumberOfPlans(Id,NumberOfPlans) AS (
    SELECT tableA.Id, COUNT(tableC.Id)
    FROM tableC
        RIGHT OUTER JOIN tableA ON tableC.tableAId = tableA.Id
    GROUP BY tableA.Id
),GetUserInformation(Id,Name,Owner,ImageUrl,
                     CompanyImageUrl,NumberOfUsers) AS (
    SELECT tableA.Id, tableA.Name, tableB.Username AS Owner, tableB.ImageUrl,
        tableB.CompanyImageUrl,COUNT(tableD.UserId),p.NumberOfPlans
    FROM tableA
        INNER JOIN tableB ON tableB.Id = tableA.Owner
        RIGHT OUTER JOIN tableD ON tableD.tableAId = tableA.Id
    GROUP BY tableA.Name, tableB.Username, tableB.ImageUrl, tableB.CompanyImageUrl
)
SELECT u.Id,u.Name,u.Owner,u.ImageUrl,u.CompanyImageUrl
    ,u.NumberOfUsers,p.NumberOfPlans
FROM GetUserInformation AS u
    INNER JOIN GetNumberOfPlans AS p ON p.Id=u.Id

After some experiences with CTE you will be find very easy to write code using CTE and you will be happy with the performance.

Hope this helps : Declared a variable , in case of any changes need to be made thats only once .

declare @line  varchar(100)

set @line ='[email protected]'

select SUBSTRING(@line ,(charindex('-',@line)+1), CHARINDEX('@',@line)-charindex('-',@line)-1)

Here is a generic function for it. Keep the RNG creation outside the high frequency code.

public static Random RNG = new Random();

public static T RandomEnum<T>()
{  
    Type type = typeof(T);
    Array values = Enum.GetValues(type);
    lock(RNG)
    {
        object value= values.GetValue(RNG.Next(values.Length));
        return (T)Convert.ChangeType(value, type);
    }
}

Usage example:

System.Windows.Forms.Keys randomKey = RandomEnum<System.Windows.Forms.Keys>();

to_char(mydate, 'MONTH') will do the job.

Used Android Studio 0.8.9. The only way worked for me is using \n. Neither wrapping with CDATA nor <br> or <br /> worked.

In your PRIMARY KEY definition you've used (id(11)), which defines a prefix key - i.e. the first 11 characters only should be used to create an index. Prefix keys are only valid for CHAR, VARCHAR, BINARY and VARBINARY types and your id field is an int, hence the error.

Use PRIMARY KEY (id) instead and you should be fine.

MySQL reference here and read from paragraph 4.

you did not use S anywhere in your algorithm (besides modifying it). the idea of dijkstra is once a vertex is on S, it will not be modified ever again. in this case, once B is inside S, you will not reach it again via C.

this fact ensures the complexity of O(E+VlogV) [otherwise, you will repeat edges more then once, and vertices more then once]

in other words, the algorithm you posted, might not be in O(E+VlogV), as promised by dijkstra's algorithm.

If the requirement is to copy all files in "\Publish\Appfolder" into the parent "\Publish\" folder (inclusive of any subfolders, following works for me) The switch '/s' allows copying of all subfolders, recursively.

xcopy src\main\Publish\Appfolder\*.* /s src\main\Publish\

When using bootstrap 4 or 5, flexbox could be used to achieve desired effect:

<body class="d-flex flex-column min-vh-100">
    <header>HEADER</header>
    <content>CONTENT</content>
    <footer class="mt-auto"></footer>
</body>

Please check the examples: Bootstrap 4 Bootstrap 5

In bootstrap 3 and without use of bootstrap. The simplest and cross browser solution for this problem is to set a minimal height for body object. And then set absolute position for the footer with bottom: 0 rule.

body {
  min-height: 100vh;
  position: relative;
  margin: 0;
  padding-bottom: 100px; //height of the footer
  box-sizing: border-box;
}

footer {
  position: absolute;
  bottom: 0;
  height: 100px;
}

Please check this example: Bootstrap 3

char *charPtr = "test string";
cout << charPtr << endl;

string str = charPtr;
cout << str << endl;

Here's a query to update a table based on a comparison of another table. If record is not found in tableB, it will update the "active" value to "n". If it's found, will set the value to NULL

UPDATE tableA
LEFT JOIN tableB ON tableA.id = tableB.id
SET active = IF(tableB.id IS NULL, 'n', NULL)";

Hope this helps someone else.

Use SELECT ... INTO:

SELECT *
INTO ABC_1
FROM ABC;

This will create a new table ABC_1 that has the same column structure as ABC and contains the same data. Constraints (e.g. keys, default values), however, are -not- copied.

You can run this query multiple times with a different table name each time.

If you don't need to copy the data, only to create a new empty table with the same column structure, add a WHERE clause with a falsy expression:

SELECT *
INTO ABC_1
FROM ABC
WHERE 1 <> 1;

>>> test
array([[0, 1, 2, 3, 4],
       [5, 6, 7, 8, 9]])

>>> ncol = test.shape[1]
>>> ncol
5L

Then you can select the 2nd - 4th column this way:

>>> test[0:, 1:(ncol - 1)]
array([[1, 2, 3],
       [6, 7, 8]])

You could write a function that runs getElementsByTagName('*'), and returns only those elements with a "data-foo" attribute:

function getAllElementsWithAttribute(attribute)
{
  var matchingElements = [];
  var allElements = document.getElementsByTagName('*');
  for (var i = 0, n = allElements.length; i < n; i++)
  {
    if (allElements[i].getAttribute(attribute) !== null)
    {
      // Element exists with attribute. Add to array.
      matchingElements.push(allElements[i]);
    }
  }
  return matchingElements;
}

Then,

getAllElementsWithAttribute('data-foo');

If both columns can contain NULL, but you still want to merge them to a single string, the easiest solution is to use CONCAT_WS():

SELECT FirstName AS First_Name
     , LastName AS Last_Name
     , CONCAT_WS('', ContactPhoneAreaCode1, ContactPhoneNumber1) AS Contact_Phone 
  FROM TABLE1

This way you won't have to check for NULL-ness of each column separately.

Alternatively, if both columns are actually defined as NOT NULL, CONCAT() will be quite enough:

SELECT FirstName AS First_Name
     , LastName AS Last_Name
     , CONCAT(ContactPhoneAreaCode1, ContactPhoneNumber1) AS Contact_Phone 
  FROM TABLE1

As for COALESCE, it's a bit different beast: given the list of arguments, it returns the first that's not NULL.

I used the data_connection_checker package to check the internet access even if the connection available by wifi or mobile, it works well: here is the code to check the connection:

bool result = await DataConnectionChecker().hasConnection;
if(result == true) {
   print('YAY! Free cute dog pics!');
} else {
   print('No internet :( Reason:');
   print(DataConnectionChecker().lastTryResults);
}

head over the package if you want more information. Data Connection Checker Package

The simplest solution is:

npm uninstall packageName --save-dev

See upper level packages names in the your project:

npm list --depth=0

The output will be like:

[email protected] /home/jackkobec/projects/myAppName
+-- packageName@packageVersion
+-- [email protected]

Copy package name and execute npm uninstall command. Example for express package:

npm uninstall express --save-dev

var obj =  _account.Retrieve(Email, hash);

AccountInfoResponse accountInfoResponse = new AccountInfoResponse();

if (obj != null)
{               
   accountInfoResponse = 
   JsonConvert.
   DeserializeObject<AccountInfoResponse>
   (JsonConvert.SerializeObject(obj));
}

image description

You can also enter a very large number, and then press dd if you wish to delete all the lines below the cursor.

If this is for some configuration file processing, consider using Apache configuration. https://commons.apache.org/proper/commons-configuration/javadocs/v1.10/apidocs/index.html?org/apache/commons/configuration/PropertiesConfiguration.html It has way to multiple values to single key- The format is bit different though

key=value1,value2,valu3 gives three values against same key.

You cannot insert data because you have a quota of 0 on the tablespace. To fix this, run

ALTER USER <user> quota unlimited on <tablespace name>;

or

ALTER USER <user> quota 100M on <tablespace name>;

as a DBA user (depending on how much space you need / want to grant).

Though it is marked as resolved here my KOTLIN RESOLUTION

fun log(properties: Map<String, Any>) {
    val propertyPairsList = properties.map { Pair(it.key, it.value) }
    val bundle = bundleOf(*propertyPairsList.toTypedArray())
}

bundleOf has vararg parameter

Change 127.0.0.1 to localhost

For example,

Change

http://127.0.0.1:8080/apex/f?p=4500:1003:437338575006149::NO:::

to

http://localhost:8080/apex/f?p=4500:1003:437338575006149::NO:::

Apache HttpComponents. The examples for the two modules - HttpCore and HttpClient will get you started right away.

Not that HttpUrlConnection is a bad choice, HttpComponents will abstract a lot of the tedious coding away. I would recommend this, if you really want to support a lot of HTTP servers/clients with minimum code. By the way, HttpCore could be used for applications (clients or servers) with minimum functionality, whereas HttpClient is to be used for clients that require support for multiple authentication schemes, cookie support etc.

important: in this kind of error you should look for simple mistakes in most cases

besides syntax error, I should say once I had same problem and it was because of bad name I have chosen for function. I have never searched for the reason but I remember that I copied another function and change it to use. I add "1" after the name to changed the function name and I got this error.

chmod u+x program_name. Then execute it.

If that does not work, copy the program from the USB device to a native volume on the system. Then chmod u+x program_name on the local copy and execute that.

Unix and Unix-like systems generally will not execute a program unless it is marked with permission to execute. The way you copied the file from one system to another (or mounted an external volume) may have turned off execute permission (as a safety feature). The command chmod u+x name adds permission for the user that owns the file to execute it.

That command only changes the permissions associated with the file; it does not change the security controls associated with the entire volume. If it is security controls on the volume that are interfering with execution (for example, a noexec option may be specified for a volume in the Unix fstab file, which says not to allow execute permission for files on the volume), then you can remount the volume with options to allow execution. However, copying the file to a local volume may be a quicker and easier solution.

The 1st element as in no hard returns. A hard return I guess = an empty node/element in the DOM which becomes the 1st element disabling the doc compatability meta tag.

If you want to stay having the field in datetime datatype, try using this:

SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, o.[date]), 0) AS Mjesec, SUM(marketingExpense) AS SumaMarketing, SUM(revenue) AS SumaZarada 
FROM [Order] o
WHERE (idCustomer = 1) AND (o.[date] BETWEEN '2001-11-3' AND '2011-11-3')
GROUP BY DATEADD(MONTH, DATEDIFF(MONTH, 0, o.[date]), 0)

It it also easy to change to group by hours, days, weeks, years...
I hope it is of use to someone,

Regards!

$(document).ready(function(e) { 
    // executes when HTML-Document is loaded and DOM is ready  
    console.log("page is loading now"); 
});

$(document).load(function(e) { 
    //when html page complete loaded
    console.log("completely loaded"); 
});

Use this:

find . -type f -print0 | tar -czvf backup.tar.gz --null -T -

It will:

• deal with files with spaces, newlines, leading dashes, and other funniness
• handle an unlimited number of files
• won't repeatedly overwrite your backup.tar.gz like using tar -c with xargs will do when you have a large number of files

Also see:

• GNU tar manual
• How can I build a tar from stdin?, search for null

If you create your test classes in a seperate folder which you then add to your build path,

Then you could make the test class an inner class of the class under test by using package correctly to set the namespace. This gives it access to private fields and methods.

But dont forget to remove the folder from the build path for your release build.

// mutiple image retrieve

 File folPath = new File(getIntent().getStringExtra("folder_path"));
 File[] imagep = folPath.listFiles();

 for (int i = 0; i < imagep.length ; i++) {
     imageModelList.add(new ImageModel(imagep[i].getAbsolutePath(), Uri.parse(imagep[i].getAbsolutePath())));
 }
 imagesAdapter.notifyDataSetChanged();

Update

See my other SO answer.

Original

var request = (HttpWebRequest)WebRequest.Create("https://example.com/endpoint");

string stringData = ""; // place body here
var data = Encoding.Default.GetBytes(stringData); // note: choose appropriate encoding

request.Method = "PUT";
request.ContentType = ""; // place MIME type here
request.ContentLength = data.Length;

var newStream = request.GetRequestStream(); // get a ref to the request body so it can be modified
newStream.Write(data, 0, data.Length);
newStream.Close();

If you have .NET v4 installed (so if you have a newer windows or if you apply the windows updates)

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe somefile.cs

or

C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe nomefile.sln

or

C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe nomefile.csproj

It's highly probable that if you have .NET installed, the %FrameworkDir% variable is set, so:

%FrameworkDir%\v4.0.30319\csc.exe ...

%FrameworkDir%\v4.0.30319\msbuild.exe ...

In my CASE I was inserting more character than defined in table.

In My Table column was defined with nvarchar(3) and I was passing more than 3 characters and same ERROR message was coming .

Its not answer but may be in some case problem is similar

Personally, I do the following:

session_start();
setcookie(session_name(), '', 100);
session_unset();
session_destroy();
$_SESSION = array();

That way, it kills the cookie, destroys all data stored internally, and destroys the current instance of the session information (which is ignored by session_destroy).

PROJECT eliminates columns while SELECT eliminates rows.

There is a difference between the navigation bar and the status bar. The confusing part is that it looks like one solid feature at the top of the screen, but the areas can actually be separated into two distinct views; a status bar and a navigation bar. The status bar spans from y=0 to y=20 points and the navigation bar spans from y=20 to y=64 points. So the navigation bar (which is where the page title and navigation buttons go) has a height of 44 points, but the status bar and navigation bar together have a total height of 64 points.

Here is a great resource that addresses this question along with a number of other sizing idiosyncrasies in iOS7: http://ivomynttinen.com/blog/the-ios-7-design-cheat-sheet/

Actually you're close to your goal, you just need to use nodes() method to split your rows and then get values:

select
    s.SqmId,
    m.c.value('@id', 'varchar(max)') as id,
    m.c.value('@type', 'varchar(max)') as type,
    m.c.value('@unit', 'varchar(max)') as unit,
    m.c.value('@sum', 'varchar(max)') as [sum],
    m.c.value('@count', 'varchar(max)') as [count],
    m.c.value('@minValue', 'varchar(max)') as minValue,
    m.c.value('@maxValue', 'varchar(max)') as maxValue,
    m.c.value('.', 'nvarchar(max)') as Value,
    m.c.value('(text())[1]', 'nvarchar(max)') as Value2
from sqm as s
    outer apply s.data.nodes('Sqm/Metrics/Metric') as m(c)

sql fiddle demo

You just need to add proper name space in your root tag . xmlns:android="http://schemas.android.com/apk/res/android" Android elemets are declared in this name space.Its same as importing class or package.

I've seen this style being used:

if (when || who || format || data || len);

if you want infos from the actual running batchfile, try this :

@echo off
set myNameFull=%0
echo myNameFull     %myNameFull%
set myNameShort=%~n0
echo myNameShort    %myNameShort%
set myNameLong=%~nx0
echo myNameLong     %myNameLong%
set myPath=%~dp0
echo myPath         %myPath%
set myLogfileWpath=%myPath%%myNameShort%.log
echo myLogfileWpath %myLogfileWpath%

more samples? C:> HELP CALL

%0 = parameter 0 = batchfile %1 = parameter 1 - 1st par. passed to batchfile... so you can try that stuff (e.g. "~dp") between 1st (e.g. "%") and last (e.g. "1") also for parameters

I had this same error in python 3.2.

I have script for email sending and:

csv.reader(open('work_dir\uslugi1.csv', newline='', encoding='utf-8'))

when I remove first char in file uslugi1.csv works fine.

Simple way to iterate over class fields and obtain values from object:

 Class<?> c = obj.getClass();
 Field[] fields = c.getDeclaredFields();
 Map<String, Object> temp = new HashMap<String, Object>();

 for( Field field : fields ){
      try {
           temp.put(field.getName().toString(), field.get(obj));
      } catch (IllegalArgumentException e1) {
      } catch (IllegalAccessException e1) {
      }
 }

When people talk about HTML5 applications they're most likely talking about writing just a simple web page or embedding a web page into their app (which will essentially provide the user interface). For the later there are different frameworks available, e.g. PhoneGap. These are used to provide more than the default browser features (e.g. multi touch) as well as allowing the app to run seamingly "standalone" and without the browser's navigation bars etc.

Give your log a name. I called mine "wawa".

In Android Studio, go to Android-> Edit Filter Configurations

Then type in the name you gave the logs. In my case, it's called "wawa". Here are some examples of the types of filters you can do. You can filter by System.out, System.err, Logs, or package names:

I agree with Chris, checking the extension is not validation of the type of file any way you look at it. Telerik's radUpload is probably your best option, it provides a ContentType property of the file being uploaded, which you can compare to known mime types. You should check for:

application/vnd.ms-excel,

application/excel,

application/x-msexcel

and for the new 2k7 format:

application/vnd.openxmlformatsofficedocument.spreadsheetml.sheet

Telerik used to sell radUpload as an individual component, but now its wrapped into the controls suite, which makes it a little more expensive, but by far its the easiest way to check for the true type

#footer ul li {
  position: relative;
  opacity: 0.99;
}

#footer ul li::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: url(/images/arrow.png) no-repeat 0 50%;
  opacity: 0.5;
}

Hack with opacity .99 (less than 1) creates z-index context so you can not worry about global z-index values. (Try to remove it and see what happens in the next demo where parent wrapper has positive z-index.)
If your element already has z-index, then you don't need this hack.

Demo of this technique.

For functional components try useEffect with props.location.

import React, {useEffect} from 'react';

const SampleComponent = (props) => {

      useEffect(() => {
        console.log(props.location);
      }, [props.location]);

}

export default SampleComponent;

Use onmouseleave.

Or, in jQuery, use mouseleave()

It is the exact thing you are looking for. Example:

<div class="outer" onmouseleave="yourFunction()">
    <div class="inner">
    </div>
</div>

or, in jQuery:

$(".outer").mouseleave(function(){
    //your code here
});

an example is here.

You will have to create a key to sign the apk. Use below to create your key:

 keytool -genkey -v -keystore my-app-key.keystore -alias my-app-alias -keyalg RSA -keysize 2048 -validity 10000

Use a password when prompted

Once the key is generated, use it to generate the installable build:

 react-native bundle --platform android --dev false --entry-file index.android.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res/

Generate the build using gradle

 cd android && ./gradlew assembleRelease

Upload the APK to your phone. The -r flag will replace the existing app (if it exists)

adb install -r ./app/build/outputs/apk/app-release-unsigned.apk

A more detailed description is mentioned here: https://facebook.github.io/react-native/docs/signed-apk-android.html

UPDATE: Based on comments by @shashuec and @Fallen

if you get error

ENOENT: no such file or directory, open 'android/app/src/main/assets/index.android.bundle'

run mkdir android/app/src/main/assets

This can be an efficient way of performing different tests on a single statement

select
case colour_txt 
  when 'red' then 5 
  when 'green' then 4 
  when 'orange' then 3
else 0 
end as Pass_Flag

this only works on equality comparisons!

In kotlin there is no replaceAll, so I created this loop to replace repeated values ??in a string or any variable.

 var someValue = "https://www.google.com.br/"
    while (someValue.contains(".")) {
        someValue = someValue.replace(".", "")
    }
Log.d("newValue :", someValue)
// in that case the stitches have been removed
//https://wwwgooglecombr/

For someone looking for a NEST JS TYPESCRIPT version of the above:

    /**
     * to fetch a signed URL of a file
     * @param key key of the file to be fetched
     * @param bucket name of the bucket containing the file
     */
    public getFileUrl(key: string, bucket?: string): Promise<string> {
        var scopeBucket: string = bucket ? bucket : this.defaultBucket;
        var params: any = {
            Bucket: scopeBucket,
            Key: key,
            Expires: signatureTimeout  // const value: 30
        };
        return this.account.getSignedUrlPromise(getSignedUrlObject, params);
    }

    /**
     * to get the downloadable file buffer of the file
     * @param key key of the file to be fetched
     * @param bucket name of the bucket containing the file
     */
    public async getFileBuffer(key: string, bucket?: string): Promise<Buffer> {
        var scopeBucket: string = bucket ? bucket : this.defaultBucket;
        var params: GetObjectRequest = {
            Bucket: scopeBucket,
            Key: key
        };
        var fileObject: GetObjectOutput = await this.account.getObject(params).promise();
        return Buffer.from(fileObject.Body.toString());
    }

    /**
     * to upload a file stream onto AWS S3
     * @param stream file buffer to be uploaded
     * @param key key of the file to be uploaded
     * @param bucket name of the bucket 
     */
    public async saveFile(file: Buffer, key: string, bucket?: string): Promise<any> {
        var scopeBucket: string = bucket ? bucket : this.defaultBucket;
        var params: any = {
            Body: file,
            Bucket: scopeBucket,
            Key: key,
            ACL: 'private'
        };
        var uploaded: any = await this.account.upload(params).promise();
        if (uploaded && uploaded.Location && uploaded.Bucket === scopeBucket && uploaded.Key === key)
            return uploaded;
        else {
            throw new HttpException("Error occurred while uploading a file stream", HttpStatus.BAD_REQUEST);
        }
    }

Yes, it is possible to use @Transactional on private methods, but as others have mentioned this won't work out of the box. You need to use AspectJ. It took me some time to figure out how to get it working. I will share my results.

I chose to use compile-time weaving instead of load-time weaving because I think it's an overall better option. Also, I'm using Java 8 so you may need to adjust some parameters.

First, add the dependency for aspectjrt.

<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjrt</artifactId>
    <version>1.8.8</version>
</dependency>

Then add the AspectJ plugin to do the actual bytecode weaving in Maven (this may not be a minimal example).

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>aspectj-maven-plugin</artifactId>
    <version>1.8</version>
    <configuration>
        <complianceLevel>1.8</complianceLevel>
        <source>1.8</source>
        <target>1.8</target>
        <aspectLibraries>
            <aspectLibrary>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
            </aspectLibrary>
        </aspectLibraries>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>compile</goal>
            </goals>
        </execution>
    </executions>
</plugin>

Finally add this to your config class

@EnableTransactionManagement(mode = AdviceMode.ASPECTJ)

Now you should be able to use @Transactional on private methods.

One caveat to this approach: You will need to configure your IDE to be aware of AspectJ otherwise if you run the app via Eclipse for example it may not work. Make sure you test against a direct Maven build as a sanity check.

import { map } from 'rxjs/operators';

this works for me in angular 8

Create a XIB file :

File -> new File ->ios->cocoa touch class -> next

make sure check mark "also create XIB file"

I would like to perform with tableview so I choosed subclass UITableViewCell

you can choose as your requerment

XIB file desing as your wish (RestaurantTableViewCell.xib)

we need to grab the row height to set table each row hegiht

Now! need to huck them swift file . i am hucked the restaurantPhoto and restaurantName you can huck all of you .

Now adding a UITableView

name
The name of the nib file, which need not include the .nib extension.

owner
The object to assign as the nib’s File's Owner object.

options
A dictionary containing the options to use when opening the nib file.

first if you do not define first then grabing all view .. so you need to grab one view inside that set frist .

Bundle.main.loadNibNamed("yourUIView", owner: self, options: nil)?.first as! yourUIView

here is table view controller Full code

import UIKit

class RestaurantTableViewController: UIViewController ,UITableViewDataSource,UITableViewDelegate{

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 5
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let restaurantTableviewCell = Bundle.main.loadNibNamed("RestaurantTableViewCell", owner: self, options: nil)?.first as! RestaurantTableViewCell

        restaurantTableviewCell.restaurantPhoto.image = UIImage(named: "image1")
        restaurantTableviewCell.restaurantName.text = "KFC Chicken"

        return restaurantTableviewCell
    }
   // set row height
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 150
    }

}

you done :)

Update: ASP.NET Core does not have a SynchronizationContext. If you are on ASP.NET Core, it does not matter whether you use ConfigureAwait(false) or not.

For ASP.NET "Full" or "Classic" or whatever, the rest of this answer still applies.

Original post (for non-Core ASP.NET):

This video by the ASP.NET team has the best information on using async on ASP.NET.

I had read that it is more performant since it doesn't have to switch thread contexts back to the original thread context.

This is true with UI applications, where there is only one UI thread that you have to "sync" back to.

In ASP.NET, the situation is a bit more complex. When an async method resumes execution, it grabs a thread from the ASP.NET thread pool. If you disable the context capture using ConfigureAwait(false), then the thread just continues executing the method directly. If you do not disable the context capture, then the thread will re-enter the request context and then continue to execute the method.

So ConfigureAwait(false) does not save you a thread jump in ASP.NET; it does save you the re-entering of the request context, but this is normally very fast. ConfigureAwait(false) could be useful if you're trying to do a small amount of parallel processing of a request, but really TPL is a better fit for most of those scenarios.

However, with ASP.NET Web Api, if your request is coming in on one thread, and you await some function and call ConfigureAwait(false) that could potentially put you on a different thread when you are returning the final result of your ApiController function.

Actually, just doing an await can do that. Once your async method hits an await, the method is blocked but the thread returns to the thread pool. When the method is ready to continue, any thread is snatched from the thread pool and used to resume the method.

The only difference ConfigureAwait makes in ASP.NET is whether that thread enters the request context when resuming the method.

I have more background information in my MSDN article on SynchronizationContext and my async intro blog post.

<ion-row *ngIf="cat === 1;else second"></ion-row>_x000D_
<ng-template #second>_x000D_
    <ion-row *ngIf="cat === 2;else third"></ion-row>_x000D_
</ng-template>_x000D_
<ng-template #third>_x000D_
_x000D_
</ng-template>

Angular is already using ng-template under the hood in many of the structural directives that we use all the time: ngIf, ngFor and ngSwitch.

> What is ng-template in Angular

https://www.angularjswiki.com/angular/what-is-ng-template-in-angular/

All explanations can be found in Python Documentation The Python Tutorial

For your first error <type 'exceptions.NameError'>: name 'outer_var' is not defined. The explanation is:

There is no shorthand for referencing data attributes (or other methods!) from within methods. I find that this actually increases the readability of methods: there is no chance of confusing local variables and instance variables when glancing through a method.

quoted from The Python Tutorial 9.4

For your second error <type 'exceptions.NameError'>: name 'OuterClass' is not defined

When a class definition is left normally (via the end), a class object is created.

quoted from The Python Tutorial 9.3.1

So when you try inner_var = Outerclass.outer_var, the Quterclass hasn't been created yet, that's why name 'OuterClass' is not defined

A more detailed but tedious explanation for your first error:

Although classes have access to enclosing functions’ scopes, though, they do not act as enclosing scopes to code nested within the class: Python searches enclosing functions for referenced names, but never any enclosing classes. That is, a class is a local scope and has access to enclosing local scopes, but it does not serve as an enclosing local scope to further nested code.

quoted from Learning.Python(5th).Mark.Lutz

I got this working by hard setting the attribute. And controlling the attribute applicability using the boolean value for the attribute.

Here is the code snippet:

<div contenteditable="{{ condition ? 'true' : 'false'}}"></div>

I hope this helps.

Table creation Syntax can be like:

Create table api_key(api_key_id INT NOT NULL IDENTITY(1,1) 
PRIMARY KEY, date_added date DEFAULT 
GetDate());

Insertion query syntax can be like:

Insert into api_key values(GETDATE());

I found that with curl 7.18.2 the download progress bar is not hidden with:

curl -s http://google.com > temp.html

but it is with:

curl -ss http://google.com > temp.html

For those who dont want to use datepicker method

var alldatepicker=  $("[class$=hasDatepicker]");

alldatepicker.each(function(){

var value=$(this).val();

var today = new Date();

var dd = today.getDate();

var mm = today.getMonth()+1; //January is 0!

var yyyy = today.getFullYear();

if(dd<10) {

    dd='0'+dd

} 
if(mm<10) {

    mm='0'+mm

} 
today = mm+'/'+dd+'/'+yyyy;
if(value!=''){
if(value>today){
alert("Date cannot be greater than current date");
}
}
}); 

Not sure if this answers the question. But I know this took me a while to figure out. I was looping through a website and all of sudden the name of the authors weren't there anymore. So needed a check statement.

if type(author) == type(None):
     my if body
else:
    my else body

Author can be any variable in this case, and None can be any type that you are checking for.

I have created an AsyncTask for saving bitmaps.

public class BitmapSaver extends AsyncTask<Void, Void, Void>
{
    public static final String TAG ="BitmapSaver";

    private Bitmap bmp;

    private Context ctx;

    private File pictureFile;

    public BitmapSaver(Context paramContext , Bitmap paramBitmap)
    {
        ctx = paramContext;

        bmp = paramBitmap;
    }

    /** Create a File for saving an image or video */
    private  File getOutputMediaFile()
    {
        // To be safe, you should check that the SDCard is mounted
        // using Environment.getExternalStorageState() before doing this. 
        File mediaStorageDir = new File(Environment.getExternalStorageDirectory()
                + "/Android/data/"
                + ctx.getPackageName()
                + "/Files"); 

        // This location works best if you want the created images to be shared
        // between applications and persist after your app has been uninstalled.

        // Create the storage directory if it does not exist
        if (! mediaStorageDir.exists()){
            if (! mediaStorageDir.mkdirs()){
                return null;
            }
        } 
        // Create a media file name
        String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmm").format(new Date());
        File mediaFile;
            String mImageName="MI_"+ timeStamp +".jpg";
            mediaFile = new File(mediaStorageDir.getPath() + File.separator + mImageName);  
        return mediaFile;

    } 
    protected Void doInBackground(Void... paramVarArgs)
    {   
        this.pictureFile = getOutputMediaFile();

        if (this.pictureFile == null) { return null; }

        try
        {
            FileOutputStream localFileOutputStream = new FileOutputStream(this.pictureFile);
            this.bmp.compress(Bitmap.CompressFormat.PNG, 90, localFileOutputStream);
            localFileOutputStream.close();
        }
        catch (FileNotFoundException localFileNotFoundException)
        {
            return null;
        }
        catch (IOException localIOException)
        {
        }
        return null;
    }

    protected void onPostExecute(Void paramVoid)
    {
        super.onPostExecute(paramVoid);

        try
        {
            //it will help you broadcast and view the saved bitmap in Gallery
            this.ctx.sendBroadcast(new Intent("android.intent.action.MEDIA_MOUNTED", Uri
                    .parse("file://" + Environment.getExternalStorageDirectory())));

            Toast.makeText(this.ctx, "File saved", 0).show();

            return;
        }
        catch (Exception localException1)
        {
            try
            {
                Context localContext = this.ctx;
                String[] arrayOfString = new String[1];
                arrayOfString[0] = this.pictureFile.toString();
                MediaScannerConnection.scanFile(localContext, arrayOfString, null,
                        new MediaScannerConnection.OnScanCompletedListener()
                        {
                            public void onScanCompleted(String paramAnonymousString ,
                                    Uri paramAnonymousUri)
                            {
                            }
                        });
                return;
            }
            catch (Exception localException2)
            {
            }
        }
    }
}

UPDATE YourTable
SET ColumnB=ColumnA
WHERE
ColumnB IS NULL 
AND ColumnA IS NOT NULL

For me, I had installed MariaDB years ago using homebrew. Correct uninstall procedure was: brew uninstall mariadb.

You can create one more class naming

.flex-control-thumbs-without-width li {
width: auto;
float: initial; or none
}

Add this class whenever you need to override like below,

<li class="flex-control-thumbs flex-control-thumbs-without-width"> </li>

And do remove whenever you don't need for other <li>

This will work in swift4 and swift5.

let dataDict = "the dictionary you want to convert in jsonString" 

let jsonData = try! JSONSerialization.data(withJSONObject: dataDict, options: JSONSerialization.WritingOptions.prettyPrinted)

let jsonString = NSString(data: jsonData, encoding: String.Encoding.utf8.rawValue)! as String

print(jsonString)

You can also just do this in all the activities that you dont want to transition from:

@Override
public void onPause() {
    super.onPause();
    overridePendingTransition(0, 0);
}

I like this approach because you do not have to mess with the style of your activity.

The only way to get the iOS dictation is to sign up yourself through Nuance: http://dragonmobile.nuancemobiledeveloper.com/ - it's expensive, because it's the best. Presumably, Apple's contract prevents them from exposing an API.

The built in iOS accessibility features allow immobilized users to access dictation (and other keyboard buttons) through tools like VoiceOver and Assistive Touch. It may not be worth reinventing this if your users might be familiar with these tools.

You have to set both layout_gravity and layout_columntWeight on your columns

<android.support.v7.widget.GridLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView android:text="??? ???"
        app:layout_gravity="fill_horizontal"
        app:layout_columnWeight="1"
        />

    <TextView android:text="??? ???"
        app:layout_gravity="fill_horizontal"
        app:layout_columnWeight="1"
        />

    <TextView android:text="??? ???"
        app:layout_gravity="fill_horizontal"
        app:layout_columnWeight="1"
        />
 </android.support.v7.widget.GridLayout>

On CentOS Linux release 7.5.1804, we were able to make this work by editing /etc/selinux/config and changing the setting of SELINUX like so:

SELINUX=disabled

dummy.xml(remember image size should be less)

<?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item>
            <layer-list android:opacity="transparent">
                <item android:width="60dp" android:gravity="left" android:start="20dp">
                    <bitmap  android:src="@drawable/down_button_dummy_dummy" android:gravity="left"/>
                </item>
            </layer-list>
        </item>
    </selector>

layout file snippet be like

<android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardUseCompatPadding="true"
        app:cardElevation="5dp"
        >
     <Spinner
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:background="@drawable/dummy">

     </Spinner>
    </android.support.v7.widget.CardView>

click to see result layout image

Try something like:

import pylab as p
p.plot(x,y)
p.axis('equal')
p.show()

If you already have the figure object use:

f.set_figheight(15)
f.set_figwidth(15)

But if you use the .subplots() command (as in the examples you're showing) to create a new figure you can also use:

f, axs = plt.subplots(2,2,figsize=(15,15))

faster way (without pyspark.sql.functions)

    df.filter((df.d<5)&((df.col1 != df.col3) |
                    (df.col2 != df.col4) & 
                    (df.col1 ==df.col3)))\
    .show()

If you want to generate 100 numbers that are random, but each number appearing only once, a good way would be to generate an array with the numbers in order, then shuffle it.

Something like this:

$arr = array();

for ($i=1;$i<=101;$i++) {
    $arr[] = $i;
}

shuffle($arr);

print_r($arr);

Output will look something like this:

Array
(
    [0] => 16
    [1] => 93
    [2] => 46
    [3] => 55
    [4] => 18
    [5] => 63
    [6] => 19
    [7] => 91
    [8] => 99
    [9] => 14
    [10] => 45
    [11] => 68
    [12] => 61
    [13] => 86
    [14] => 64
    [15] => 17
    [16] => 27
    [17] => 35
    [18] => 87
    [19] => 10
    [20] => 95
    [21] => 43
    [22] => 51
    [23] => 92
    [24] => 22
    [25] => 58
    [26] => 71
    [27] => 13
    [28] => 66
    [29] => 53
    [30] => 49
    [31] => 78
    [32] => 69
    [33] => 1
    [34] => 42
    [35] => 47
    [36] => 26
    [37] => 76
    [38] => 70
    [39] => 100
    [40] => 57
    [41] => 2
    [42] => 23
    [43] => 15
    [44] => 96
    [45] => 48
    [46] => 29
    [47] => 81
    [48] => 4
    [49] => 33
    [50] => 79
    [51] => 84
    [52] => 80
    [53] => 101
    [54] => 88
    [55] => 90
    [56] => 56
    [57] => 62
    [58] => 65
    [59] => 38
    [60] => 67
    [61] => 74
    [62] => 37
    [63] => 60
    [64] => 21
    [65] => 89
    [66] => 3
    [67] => 32
    [68] => 25
    [69] => 52
    [70] => 50
    [71] => 20
    [72] => 12
    [73] => 7
    [74] => 54
    [75] => 36
    [76] => 28
    [77] => 97
    [78] => 94
    [79] => 41
    [80] => 72
    [81] => 40
    [82] => 83
    [83] => 30
    [84] => 34
    [85] => 39
    [86] => 6
    [87] => 98
    [88] => 8
    [89] => 24
    [90] => 5
    [91] => 11
    [92] => 73
    [93] => 44
    [94] => 85
    [95] => 82
    [96] => 75
    [97] => 31
    [98] => 77
    [99] => 9
    [100] => 59
)

For me it worked by adding android:textAllCaps="true" and android:inputType="textCapCharacters"

<android.support.design.widget.TextInputEditText
                    android:layout_width="fill_parent"
                    android:layout_height="@dimen/edit_text_height"
                    android:textAllCaps="true"
                    android:inputType="textCapCharacters"
                    />

s.replaceAll ("\\\\", "");

You need to mask a backslash in your source, and for regex, you need to mask it again, so for every backslash you need two, which ends in 4.

But

s = "http://www.example.com\\/value";

needs two backslashes in source as well.

Back in the day I found that Rdb, the former DEC product now supported by Oracle allowed the column alias to be used in the GROUP BY. Mainstream Oracle through version 11 does not allow the column alias to be used in the GROUP BY. Not sure what Postgresql, SQL Server, MySQL, etc will or won't allow. YMMV.

How about with a :before pseudoelement:

a:before {
  content: '\a';
  white-space: pre;
}

If you want to sort data either in Ascending or Descending order based on particular column, using sequlize js, use the order method of sequlize as follows

// Will order the specified column by descending order
order: sequelize.literal('column_name order')
e.g. order: sequelize.literal('timestamp DESC')

The Python executable might be installed at a location other than /usr/bin, but env is nearly always present in that location so using /usr/bin/envis more portable.

Simple:

text-transform: capitalize;

CREATE EVENT test_event_03
ON SCHEDULE EVERY 1 MINUTE
STARTS CURRENT_TIMESTAMP
ENDS CURRENT_TIMESTAMP + INTERVAL 1 HOUR
DO
   INSERT INTO messages(message,created_at)
   VALUES('Test MySQL recurring Event',NOW());

This is how I used clearInterval() method to stop the timer after 10 seconds.

function startCountDown() {_x000D_
  var countdownNumberEl = document.getElementById('countdown-number');_x000D_
  var countdown = 10;_x000D_
  const interval = setInterval(() => {_x000D_
    countdown = --countdown <= 0 ? 10 : countdown;_x000D_
    countdownNumberEl.textContent = countdown;_x000D_
    if (countdown == 1) {_x000D_
      clearInterval(interval);_x000D_
    }_x000D_
  }, 1000)_x000D_
}

<head>_x000D_
  <body>_x000D_
    <button id="countdown-number" onclick="startCountDown();">Show Time </button>_x000D_
  </body>_x000D_
</head>

on unix systems, use the system kernel to generate a uuid for you.

file_get_contents('/proc/sys/kernel/random/uuid')

Credit Samveen on https://serverfault.com/a/529319/210994

Note!: Using this method to get a uuid does in fact exhaust the entropy pool, very quickly! I would avoid using this where it would be called frequently.

Lets take an example where you want to print numbers from 0 to n in the same line. You can do this with the help of following code.

n=int(raw_input())
i=0
while(i<n):
    print i,
    i = i+1

At input, n = 5

Output : 0 1 2 3 4 

try

Environment.GetEnvironmentVariable("temp");

Even i ran into the same issue with mysql and liquibase. So this is what the problem is: The table from which you want to reference a column of other table is different either in case of datatype or in terms of size of the datatype.

Error appears in below scenario:
Scenario 1:
Table A has column id, type=bigint
Table B column referenced_id type varchar(this column gets the value from the id column of Table A.)
Liquibase changeset for table B:

    <changeset id="XXXXXXXXXXX-1" author="xyz">
            <column name="referenced_id" **type="varchar"**>
        </column>
            </changeset>
    <changeSet id="XXXXXXXXXXX-2" author="xyz">
                <addForeignKeyConstraint constraintName="FK_table_A"
                    referencedTableName="A" **baseColumnNames="referenced_id**"
                    referencedColumnNames="id" baseTableName="B" />
    </changeSet>

Table A changeSet:

    <changeSet id="YYYYYYYYYY" author="xyz">
     <column **name="id"** **type="bigint"** autoIncrement="${autoIncrement}">
                    <constraints primaryKey="true" nullable="false"/>
                </column>
    </changeSet>

Solution: 
correct the type of table B to bigint because the referenced table has type bigint.

Scenrario 2:
The type might be correct but the size might not.
e.g. :
Table B : referenced column type="varchar 50"
Table A : base column type ="varchar 255"

Solution change the size of referenced column to that of base table's column size.

Yes, there is a way. Its called custom fonts in CSS.Your CSS needs to be modified, and you need to upload those fonts to your website.

The CSS required for this is:

@font-face {
     font-family: Thonburi-Bold;
     src: url('pathway/Thonburi-Bold.otf'); 
}

The simple answer for this one is that you have an undeclared (null) variable. In this case it is $md5. From the comment you put this needed to be declared elsewhere in your code

$md5 = new-object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider

The error was because you are trying to execute a method that does not exist.

PS C:\Users\Matt> $md5 | gm


   TypeName: System.Security.Cryptography.MD5CryptoServiceProvider

Name                       MemberType Definition                                                                                                                            
----                       ---------- ----------                                                                                                                            
Clear                      Method     void Clear()                                                                                                                          
ComputeHash                Method     byte[] ComputeHash(System.IO.Stream inputStream), byte[] ComputeHash(byte[] buffer), byte[] ComputeHash(byte[] buffer, int offset, ...

The .ComputeHash() of $md5.ComputeHash() was the null valued expression. Typing in gibberish would create the same effect.

PS C:\Users\Matt> $bagel.MakeMeABagel()
You cannot call a method on a null-valued expression.
At line:1 char:1
+ $bagel.MakeMeABagel()
+ ~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull

PowerShell by default allows this to happen as defined its StrictMode

When Set-StrictMode is off, uninitialized variables (Version 1) are assumed to have a value of 0 (zero) or $Null, depending on type. References to non-existent properties return $Null, and the results of function syntax that is not valid vary with the error. Unnamed variables are not permitted.

select * from tblFruit where
tblFruit_ID in (Select max(tblFruit_ID) FROM tblFruit group by tblFruit_FruitType)

onProgressChanged() should be called on every progress changed, not just on first and last touch (that why you have onStartTrackingTouch() and onStopTrackingTouch() methods).

Make sure that your SeekBar have more than 1 value, that is to say your MAX>=3.

In your onCreate:

 yourSeekBar=(SeekBar) findViewById(R.id.yourSeekBar);
 yourSeekBar.setOnSeekBarChangeListener(new yourListener());

Your listener:

private class yourListener implements SeekBar.OnSeekBarChangeListener {

        public void onProgressChanged(SeekBar seekBar, int progress,
                boolean fromUser) {
                            // Log the progress
            Log.d("DEBUG", "Progress is: "+progress);
                            //set textView's text
            yourTextView.setText(""+progress);
        }

        public void onStartTrackingTouch(SeekBar seekBar) {}

        public void onStopTrackingTouch(SeekBar seekBar) {}

    }

Please share some code and the Log results for furter help.

You could try something like this (as shown here: Select a Directory with a JFileChooser):

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.util.*;


public class DemoJFileChooser extends JPanel
   implements ActionListener {
   JButton go;

   JFileChooser chooser;
   String choosertitle;

  public DemoJFileChooser() {
    go = new JButton("Do it");
    go.addActionListener(this);
    add(go);
   }

  public void actionPerformed(ActionEvent e) {            
    chooser = new JFileChooser(); 
    chooser.setCurrentDirectory(new java.io.File("."));
    chooser.setDialogTitle(choosertitle);
    chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    //
    // disable the "All files" option.
    //
    chooser.setAcceptAllFileFilterUsed(false);
    //    
    if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) { 
      System.out.println("getCurrentDirectory(): " 
         +  chooser.getCurrentDirectory());
      System.out.println("getSelectedFile() : " 
         +  chooser.getSelectedFile());
      }
    else {
      System.out.println("No Selection ");
      }
     }

  public Dimension getPreferredSize(){
    return new Dimension(200, 200);
    }

  public static void main(String s[]) {
    JFrame frame = new JFrame("");
    DemoJFileChooser panel = new DemoJFileChooser();
    frame.addWindowListener(
      new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
          System.exit(0);
          }
        }
      );
    frame.getContentPane().add(panel,"Center");
    frame.setSize(panel.getPreferredSize());
    frame.setVisible(true);
    }
}

We can use

@Override
 public void onWindowFocusChanged(boolean hasFocus) {
  super.onWindowFocusChanged(hasFocus);
  //Here you can get the size!
 }

Here is my anwer of this question. I combine the 'Ambient Context' pattern with IDisposable. So you can use the DateTimeProvider.Current in your normal program code and in the test you override the scope with a using statement.

using System;
using System.Collections.Immutable;


namespace ambientcontext {

public abstract class DateTimeProvider : IDisposable
{
    private static ImmutableStack<DateTimeProvider> stack = ImmutableStack<DateTimeProvider>.Empty.Push(new DefaultDateTimeProvider());

    protected DateTimeProvider()
    {
        if (this.GetType() != typeof(DefaultDateTimeProvider))
            stack = stack.Push(this);
    }

    public static DateTimeProvider Current => stack.Peek();
    public abstract DateTime Today { get; }
    public abstract DateTime Now {get; }

    public void Dispose()
    {
        if (this.GetType() != typeof(DefaultDateTimeProvider))
            stack = stack.Pop();
    }

    // Not visible Default Implementation 
    private class DefaultDateTimeProvider : DateTimeProvider {
        public override DateTime Today => DateTime.Today; 
        public override DateTime Now => DateTime.Now; 
    }
}
}

Here is how to use the above DateTimeProvider inside a Unit-Test

using System;
using Xunit;

namespace ambientcontext
{
    public class TestDateTimeProvider
    {
        [Fact]
        public void TestDateTime()
        {
            var actual = DateTimeProvider.Current.Today;
            var expected = DateTime.Today;

            Assert.Equal<DateTime>(expected, actual);

            using (new MyDateTimeProvider(new DateTime(2012,12,21)))
            {
                Assert.Equal(2012, DateTimeProvider.Current.Today.Year);

                using (new MyDateTimeProvider(new DateTime(1984,4,4)))
                {
                    Assert.Equal(1984, DateTimeProvider.Current.Today.Year);    
                }

                Assert.Equal(2012, DateTimeProvider.Current.Today.Year);
            }

            // Fall-Back to Default DateTimeProvider 
            Assert.Equal<int>(expected.Year,  DateTimeProvider.Current.Today.Year);
        }

        private class MyDateTimeProvider : DateTimeProvider 
        {
            private readonly DateTime dateTime; 

            public MyDateTimeProvider(DateTime dateTime):base()
            {
                this.dateTime = dateTime; 
            }

            public override DateTime Today => this.dateTime.Date;

            public override DateTime Now => this.dateTime;
        }
    }
}

mail -s "$(echo -e "This is the subject\nFrom: Paula <[email protected]>\n
Reply-to: [email protected]\nContent-Type: text/html\n")" 
[email protected] < htmlFileMessage.txt

the above is my solution..just replace the "Paula" with any name you want e.g Johny Bravo..any extra headers can be added just after the from and before the reply to...just make sure you know your headers syntax before adding them....this worked perfectly for me.

Signalling a pod on config map update is a feature in the works (https://github.com/kubernetes/kubernetes/issues/22368).

You can always write a custom pid1 that notices the confimap has changed and restarts your app.

You can also eg: mount the same config map in 2 containers, expose a http health check in the second container that fails if the hash of config map contents changes, and shove that as the liveness probe of the first container (because containers in a pod share the same network namespace). The kubelet will restart your first container for you when the probe fails.

Of course if you don't care about which nodes the pods are on, you can simply delete them and the replication controller will "restart" them for you.

Right click on project-> Maven->Click checked box 'Force Update'->Update

= can be used when the subquery returns only 1 value.

When subquery returns more than 1 value, you will have to use IN:

select * 
from table
where id IN (multiple row query);

For example:

SELECT *
FROM Students
WHERE Marks = (SELECT MAX(Marks) FROM Students)   --Subquery returns only 1 value

SELECT *
FROM Students
WHERE Marks IN 
      (SELECT Marks 
       FROM Students 
       ORDER BY Marks DESC
       LIMIT 10)                       --Subquery returns 10 values

There is a PowerShell script at ratil.life/first-useful-powershell-script-putty-to-ssh-config which can convert the sessions to a format that can be used in .ssh/config. It can also be found on GitHub.

This excerpt contains the main guts of the code, and will print the resulting config directly to stdout:

# Registry path to PuTTY configured profiles
$regPath = 'HKCU:\SOFTWARE\SimonTatham\PuTTY\Sessions'

# Iterate over each PuTTY profile
Get-ChildItem $regPath -Name | ForEach-Object {

    # Check if SSH config
    if (((Get-ItemProperty -Path "$regPath\$_").Protocol) -eq 'ssh') {
        # Write the Host for easy SSH use
        $host_nospace = $_.replace('%20', $SpaceChar)
        $hostLine =  "Host $host_nospace"

        # Parse Hostname for special use cases (Bastion) to create SSH hostname
        $puttyHostname = (Get-ItemProperty -Path "$regPath\$_").HostName
        if ($puttyHostname -like '*@*') {
            $sshHostname = $puttyHostname.split("@")[-1]
            }
        else { $sshHostname = $puttyHostname }
        $hostnameLine = "`tHostName $sshHostname"   

        # Parse Hostname for special cases (Bastion) to create User
        if ($puttyHostname -like '*@*') {
            $sshUser = $puttyHostname.split("@")[0..($puttyHostname.split('@').length - 2)] -join '@'
            }
        else { $sshHostname = $puttyHostname }
        $userLine = "`tUser $sshUser"   

        # Parse for Identity File
        $puttyKeyfile = (Get-ItemProperty -Path "$regPath\$_").PublicKeyFile
        if ($puttyKeyfile) { 
            $sshKeyfile = $puttyKeyfile.replace('\', '/')
            if ($prefix) { $sshKeyfile = $sshKeyfile.replace('C:', $prefix) }
            $identityLine = "`tIdentityFile $sshKeyfile"
            }

        # Parse Configured Tunnels
        $puttyTunnels = (Get-ItemProperty -Path "$regPath\$_").PortForwardings
        if ($puttyTunnels) {
            $puttyTunnels.split() | ForEach-Object {

                # First character denotes tunnel type
                $tunnelType = $_.Substring(0,1)
                # Digits follow tunnel type is local port
                $tunnelPort = $_ -match '\d*\d(?==)' | Foreach {$Matches[0]}
                # Text after '=' is the tunnel destination
                $tunnelDest = $_.split('=')[1]

                if ($tunnelType -eq 'D') {
                    $tunnelLine = "`tDynamicForward $tunnelPort $tunnelDest"
                }

                ElseIf ($tunnelType -eq 'R') {
                    $tunnelLine = "`tRemoteForward $tunnelPort $tunnelDest"
                }

                ElseIf ($tunnelType -eq 'L') {
                    $tunnelLine = "`tLocalForward $tunnelPort $tunnelDest"
                }

            }

        # Parse if Forward Agent is required
        $puttyAgent = (Get-ItemProperty -Path "$regPath\$_").AgentFwd
        if ($puttyAgent -eq 1) { $agentLine = "`tForwardAgent yes" }

        # Parse if non-default port
        $puttyPort = (Get-ItemProperty -Path "$regPath\$_").PortNumber
        if (-Not $puttyPort -eq 22) { $PortLine = "`tPort $puttyPort" }

        }

        # Build output string
        $output = "$hostLine`n$hostnameLine`n$userLine`n$identityLine`n$tunnelLine`n$agentLine`n"

        # Output to file if set, otherwise STDOUT
        if ($outfile) { $output | Out-File $outfile -Append}
        else { Write-Host $output }
    }

}

The first thing to do would probably be to replace every mysql_* function call with its equivalent mysqli_*, at least if you are willing to use the procedural API -- which would be the easier way, considering you already have some code based on the MySQL API, which is a procedural one.

To help with that, the MySQLi Extension Function Summary is definitely something that will prove helpful.

For instance:

• mysql_connect will be replaced by mysqli_connect
• mysql_error will be replaced by mysqli_error and/or mysqli_connect_error, depending on the context
• mysql_query will be replaced by mysqli_query
• and so on

Note: For some functions, you may need to check the parameters carefully: Maybe there are some differences here and there -- but not that many, I'd say: both mysql and mysqli are based on the same library (libmysql ; at least for PHP <= 5.2)

For instance:

• with mysql, you have to use the mysql_select_db once connected, to indicate on which database you want to do your queries
• mysqli, on the other side, allows you to specify that database name as the fourth parameter to mysqli_connect.
• Still, there is also a mysqli_select_db function that you can use, if you prefer.

$(document).ready(function(){
    $("#btnSubmit").bind("click",function(){$('#'+'<%=btnUpload.ClientID %>').trigger("click");return false;});
    $("body, input, textarea").keypress(function(e){
        if(e.which==13) $("#btnSubmit").click();
    });
});

Hope this may help you!!!

For those, like me, who did not have the possibility to use angular directive and were "stuck" outside of the angular scope, here is something that might help you.

After hours searching on the web and on the angular doc, I have created a class that compiles HTML, place it inside a targets, and binds it to a scope ($rootScope if there is no $scope for that element)

/**
 * AngularHelper : Contains methods that help using angular without being in the scope of an angular controller or directive
 */
var AngularHelper = (function () {
    var AngularHelper = function () { };

    /**
     * ApplicationName : Default application name for the helper
     */
    var defaultApplicationName = "myApplicationName";

    /**
     * Compile : Compile html with the rootScope of an application
     *  and replace the content of a target element with the compiled html
     * @$targetDom : The dom in which the compiled html should be placed
     * @htmlToCompile : The html to compile using angular
     * @applicationName : (Optionnal) The name of the application (use the default one if empty)
     */
    AngularHelper.Compile = function ($targetDom, htmlToCompile, applicationName) {
        var $injector = angular.injector(["ng", applicationName || defaultApplicationName]);

        $injector.invoke(["$compile", "$rootScope", function ($compile, $rootScope) {
            //Get the scope of the target, use the rootScope if it does not exists
            var $scope = $targetDom.html(htmlToCompile).scope();
            $compile($targetDom)($scope || $rootScope);
            $rootScope.$digest();
        }]);
    }

    return AngularHelper;
})();

It covered all of my cases, but if you find something that I should add to it, feel free to comment or edit.

Hope it will help.

java.util.Date object can't represent date in custom format instead you've to use SimpleDateFormat.format method that returns string.

String myString=format1.format(date);

I don't know about Windows (never used it), but on a Linux system you just have to create a build directory (in the top source directory)

mkdir build-dir

go inside it

cd build-dir

then run cmake and point to the parent directory

cmake ..

and finally run make

make

Notice that make and cmake are different programs. cmake is a Makefile generator, and the make utility is governed by a Makefile textual file. See cmake & make wikipedia pages.

NB: On Windows, cmake might operate so could need to be used differently. You'll need to read the documentation (like I did for Linux)

Calling sort on a hash converts it into nested arrays and then sorts them by key, so all you need is this:

puts h.sort.map {|k,v| ["#{k}----"] + v}

And if you don't actually need the "----" part, it can be just:

puts h.sort

Technically, you will be sending these headers through the connect function before the protocol upgrade phase. This worked for me in a nodejs project:

var WebSocketClient = require('websocket').client;
var ws = new WebSocketClient();
ws.connect(url, '', headers);

If the answers already posted didn't help, one can try with $location.search().myParam; with URLs http://example.domain#?myParam=paramValue

cp -r /home/server/folder/test /home/server/

Either of the latter two, since val could potentially be of a type that defines __eq__() to return true when passed None.

    DB::statement("your query")

I used it for add index to column in migration

write code in body tag like this

<body style="background-image: url('Image URL');" >
</body>

Here you go.

    SELECT
    [so].[name] AS [trigger_name],
    USER_NAME([so].[uid]) AS [trigger_owner],
    USER_NAME([so2].[uid]) AS [table_schema],
    OBJECT_NAME([so].[parent_obj]) AS [table_name],
    OBJECTPROPERTY( [so].[id], 'ExecIsUpdateTrigger') AS [isupdate],
    OBJECTPROPERTY( [so].[id], 'ExecIsDeleteTrigger') AS [isdelete],
    OBJECTPROPERTY( [so].[id], 'ExecIsInsertTrigger') AS [isinsert],
    OBJECTPROPERTY( [so].[id], 'ExecIsAfterTrigger') AS [isafter],
    OBJECTPROPERTY( [so].[id], 'ExecIsInsteadOfTrigger') AS [isinsteadof],
    OBJECTPROPERTY([so].[id], 'ExecIsTriggerDisabled') AS [disabled] 
FROM sysobjects AS [so]
INNER JOIN sysobjects AS so2 ON so.parent_obj = so2.Id
WHERE [so].[type] = 'TR'

A couple of things here...

Also I see that you were attempting to pull the parent tables schema information, I believe in order to do so you would also need to join the sysobjects table on itself so that you can correctly get the schema information for the parent table. the query above does this. Also the sysusers table wasn't needed in the results so that Join has been removed.

tested with SQL 2000, SQL 2005, and SQL 2008 R2

I've tried ControlBrushKey but it didn't work for unselected rows. The background for the unselected row was still white. But I've managed to find out that I have to override the rowstyle.

<DataGrid x:Name="pbSelectionDataGrid" Height="201" Margin="10,0"
          FontSize="20" SelectionMode="Single" FontWeight="Bold">
    <DataGrid.Resources>
        <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="#FFFDD47C"/>
        <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="#FFA6E09C"/>
        <SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Red"/>
        <SolidColorBrush x:Key="{x:Static SystemColors.ControlTextBrushKey}" Color="Violet"/>
    </DataGrid.Resources>
    <DataGrid.RowStyle>
        <Style TargetType="DataGridRow">
            <Setter Property="Background" Value="LightBlue" />
        </Style>
    </DataGrid.RowStyle>
</DataGrid>

Using inline styling use <a href="your link here" style="cursor:default">your content here</a>. See this example

Alternatively use css. See this example.

This solution is cross-browser compatible.

Python 3.0 doesn't have sys.maxint any more since Python 3's ints are of arbitrary length. Instead of sys.maxint it has sys.maxsize; the maximum size of a positive sized size_t aka Py_ssize_t.

Got this error because I had the Data Source Name in User DSN instead of System DSN

I was facing the same issue, fixed by doing this in MainActivity

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
TextView mTitle = (TextView) toolbar.findViewById(R.id.toolbar_title);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);

And In Fragment

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    if (view == null) {
        // Inflate the layout for this fragment
        view = inflater.inflate(R.layout.fragment_example, container, false);
        init();
    }
    getActivity().setTitle("Choose Fragment");
    return view;
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.example_menu, menu);
}

The index hint is only available for Microsoft Dynamics database servers. For traditional SQL Server, the filters you define in your 'Where' clause should persuade the engine to use any relevant indices... Provided the engine's execution plan can efficiently identify how to read the information (whether a full table scan or an indexed scan) - it must compare the two before executing the statement proper, as part of its built-in performance optimiser.

However, you can force the optimiser to scan by using something like

    Select  *
    From    [yourtable] With (Index(0))
    Where   ...

Or to seek a particular index by using something like

    Select  *
    From    [yourtable] With (Index(1))
    Where   ...

The choice is yours. Look at the table's index properties in the object panel to get an idea of which index you want to use. It ought to match your filter(s).

For best results, list the filters which would return the fewest results first. I don't know if I'm right in saying, but it seems like the query filters are sequential; if you get your sequence right, the optimiser shouldn't have to do it for you by comparing all the combinations, or at least not begin the comparison with the more expensive queries.

A shorter way to write the condition:

WHERE some_col > ''

Since null > '' produces unknown, this has the effect of filtering out both null and empty strings.

Control characters:

(Hex codes assume an ASCII-compatible character encoding.)

• \a = \x07 = alert (bell)
• \b = \x08 = backspace
• \t = \x09 = horizonal tab
• \n = \x0A = newline (or line feed)
• \v = \x0B = vertical tab
• \f = \x0C = form feed
• \r = \x0D = carriage return
• \e = \x1B = escape (non-standard GCC extension)

Punctuation characters:

• \" = quotation mark (backslash not required for '"')
• \' = apostrophe (backslash not required for "'")
• \? = question mark (used to avoid trigraphs)
• \\ = backslash

Numeric character references:

• \ + up to 3 octal digits
• \x + any number of hex digits
• \u + 4 hex digits (Unicode BMP, new in C++11)
• \U + 8 hex digits (Unicode astral planes, new in C++11)

\0 = \00 = \000 = octal ecape for null character

If you do want an actual digit character after a \0, then yes, I recommend string concatenation. Note that the whitespace between the parts of the literal is optional, so you can write "\0""0".

This might help someone who use Zend_Oauth_Client to work with twitter api. This working config:

$accessToken = new Zend_Oauth_Token_Access();
$accessToken->setToken('accessToken');
$accessToken->setTokenSecret('accessTokenSecret');

$client = $accessToken->getHttpClient(array(
    'requestScheme' => Zend_Oauth::REQUEST_SCHEME_HEADER,
    'version' => '1.0', // it was 1.1 and I got 215 error.
    'signatureMethod' => 'HMAC-SHA1',
    'consumerKey' => 'foo',
    'consumerSecret' => 'bar',
    'requestTokenUrl' => 'https://api.twitter.com/oauth/request_token',
    'authorizeUrl' => 'https://api.twitter.com/oauth/authorize',
    'accessTokenUrl' => 'https://api.twitter.com/oauth/access_token',
    'timeout' => 30
));

It look like twitter api 1.0 allows oauth version to be 1.1 and 1.0, where twitter api 1.1 require only oauth version to be 1.0.

P.S We do not use Zend_Service_Twitter as it does not allow send custom params on status update.

Simple

public Date convertFrom(LocalDate date) {
    return java.sql.Timestamp.valueOf(date.atStartOfDay());
}

You don't show us the declaration of carBootSaleList. However from the exception message I can see that it is of type CarBootSaleList. This type doesn't implement the IEnumerable interface and therefore cannot be used in a foreach.

Your CarBootSaleList class should implement IEnumerable<CarBootSale>:

public class CarBootSaleList : IEnumerable<CarBootSale>
{
    private List<CarBootSale> carbootsales;

    ...

    public IEnumerator<CarBootSale> GetEnumerator()
    {
        return carbootsales.GetEnumerator();
    }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return carbootsales.GetEnumerator();
    }
}

Dynamic programming is a technique for solving problems with overlapping sub problems. A dynamic programming algorithm solves every sub problem just once and then Saves its answer in a table (array). Avoiding the work of re-computing the answer every time the sub problem is encountered. The underlying idea of dynamic programming is: Avoid calculating the same stuff twice, usually by keeping a table of known results of sub problems.

The seven steps in the development of a dynamic programming algorithm are as follows:

1. Establish a recursive property that gives the solution to an instance of the problem.
2. Develop a recursive algorithm as per recursive property
3. See if same instance of the problem is being solved again an again in recursive calls
4. Develop a memoized recursive algorithm
5. See the pattern in storing the data in the memory
6. Convert the memoized recursive algorithm into iterative algorithm
7. Optimize the iterative algorithm by using the storage as required (storage optimization)

Swift 2

Using Trailing Closures this becomes:

dispatch_async(dispatch_get_main_queue()) {
    self.tableView.reloadData()
}

Trailing Closures is Swift syntactic sugar that enables defining the closure outside of the function parameter scope. For more information see Trailing Closures in Swift 2.2 Programming Language Guide.

In dispatch_async case the API is func dispatch_async(queue: dispatch_queue_t, _ block: dispatch_block_t) since dispatch_block_t is type alias for () -> Void - A closure that receives 0 parameters and does not have a return value, and block being the last parameter of the function we can define the closure in the outer scope of dispatch_async.

Calling object.paintComponent(g) is an error.

Instead this method is called automatically when the panel is created. The paintComponent() method can also be called explicitly by the repaint() method defined in Component class.

The effect of calling repaint() is that Swing automatically clears the graphic on the panel and executes the paintComponent method to redraw the graphics on this panel.

This is a simple way from XML only

spanCount for number of columns

layoutManager for making it grid or linear(Vertical or Horizontal)

<androidx.recyclerview.widget.RecyclerView
        android:id="@+id/personListRecyclerView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
        app:spanCount="2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

This should do it

old_string = "this is going to have a full stop. some written sstuff!"
k = old_string.rfind(".")
new_string = old_string[:k] + ". - " + old_string[k+1:]

I haven't done anything with rank, but I discovered this today with row_number().

select item, name, sold, row_number() over(partition by item order by sold) as row from table_name

This will result in some repeating row numbers since in my case each name holds all items. Each item will be ordered by how many were sold.

+--------+------+-----+----+
|glasses |store1|  30 | 1  |
|glasses |store2|  35 | 2  |
|glasses |store3|  40 | 3  |
|shoes   |store2|  10 | 1  |
|shoes   |store1|  20 | 2  |
|shoes   |store3|  22 | 3  |
+--------+------+-----+----+

Example query:

DELETE FROM Table
WHERE ID NOT IN
(
SELECT MIN(ID)
FROM Table
GROUP BY Field1, Field2, Field3, ...
)

Here fields are column on which you want to group the duplicate rows.