Programs & Examples On #Default parameters

Python: The Mutable Default Argument

Default arguments get evaluated at the time the function is compiled into a function object. When used by the function, multiple times by that function, they are and remain the same object.

When they are mutable, when mutated (for example, by adding an element to it) they remain mutated on consecutive calls.

They stay mutated because they are the same object each time.

Equivalent code:

Since the list is bound to the function when the function object is compiled and instantiated, this:

def foo(mutable_default_argument=[]): # make a list the default argument
    """function that uses a list"""

is almost exactly equivalent to this:

_a_list = [] # create a list in the globals

def foo(mutable_default_argument=_a_list): # make it the default argument
    """function that uses a list"""

del _a_list # remove globals name binding

Demonstration

Here's a demonstration - you can verify that they are the same object each time they are referenced by

• seeing that the list is created before the function has finished compiling to a function object,
• observing that the id is the same each time the list is referenced,
• observing that the list stays changed when the function that uses it is called a second time,
• observing the order in which the output is printed from the source (which I conveniently numbered for you):

example.py

print('1. Global scope being evaluated')

def create_list():
    '''noisily create a list for usage as a kwarg'''
    l = []
    print('3. list being created and returned, id: ' + str(id(l)))
    return l

print('2. example_function about to be compiled to an object')

def example_function(default_kwarg1=create_list()):
    print('appending "a" in default default_kwarg1')
    default_kwarg1.append("a")
    print('list with id: ' + str(id(default_kwarg1)) + 
          ' - is now: ' + repr(default_kwarg1))

print('4. example_function compiled: ' + repr(example_function))


if __name__ == '__main__':
    print('5. calling example_function twice!:')
    example_function()
    example_function()

and running it with python example.py:

1. Global scope being evaluated
2. example_function about to be compiled to an object
3. list being created and returned, id: 140502758808032
4. example_function compiled: <function example_function at 0x7fc9590905f0>
5. calling example_function twice!:
appending "a" in default default_kwarg1
list with id: 140502758808032 - is now: ['a']
appending "a" in default default_kwarg1
list with id: 140502758808032 - is now: ['a', 'a']

Does this violate the principle of "Least Astonishment"?

This order of execution is frequently confusing to new users of Python. If you understand the Python execution model, then it becomes quite expected.

The usual instruction to new Python users:

But this is why the usual instruction to new users is to create their default arguments like this instead:

def example_function_2(default_kwarg=None):
    if default_kwarg is None:
        default_kwarg = []

This uses the None singleton as a sentinel object to tell the function whether or not we've gotten an argument other than the default. If we get no argument, then we actually want to use a new empty list, [], as the default.

As the tutorial section on control flow says:

If you don’t want the default to be shared between subsequent calls, you can write the function like this instead:

def f(a, L=None):
    if L is None:
        L = []
    L.append(a)
    return L

There is much more to it than you think. Consider the defaults to be static (=constant reference pointing to one object) and stored somewhere in the definition; evaluated at method definition time; as part of the class, not the instance. As they are constant, they cannot depend on self.

Here is an example. It is counterintuitive, but actually makes perfect sense:

def add(item, s=[]):
    s.append(item)
    print len(s)

add(1)     # 1
add(1)     # 2
add(1, []) # 1
add(1, []) # 1
add(1)     # 3

This will print 1 2 1 1 3.

Because it works the same way as

default_s=[]
def add(item, s=default_s):
    s.append(item)

Obviously, if you modify default_s, it retains these modifications.

There are various workarounds, including

def add(item, s=None):
    if not s: s = []
    s.append(item)

or you could do this:

def add(self, item, s=None):
    if not s: s = self.makeDefaultS()
    s.append(item)

Then the method makeDefaultS will have access to self.

Another variation:

import types
def add(item, s=lambda self:[]):
    if isinstance(s, types.FunctionType): s = s("example")
    s.append(item)

here the default value of s is a factory function.

You can combine all these techniques:

class Foo:
    import types
    def add(self, item, s=Foo.defaultFactory):
        if isinstance(s, types.FunctionType): s = s(self)
        s.append(item)

    def defaultFactory(self):
        """ Can be overridden in a subclass, too!"""
        return []

Just a different approach to set default params is to use object map of arguments, instead of arguments directly. For example,

const defaultConfig = {
 category: 'Animals',
 legs: 4
};

function checkOrganism(props) {
 const category = props.category || defaultConfig.category;
 const legs = props.legs || defaultConfig.legs;
}

This way, it's easy to extend the arguments and not worry about argument length mismatch.

No. In general Java doesn't have much (any) syntactic sugar, since they tried to make a simple language.

No.

Not even the very latest C99 standard supports this.

You can call it three ways - with parameters, with DEFAULT and via EXECUTE

SET NOCOUNT ON;

DECLARE
@Table  SYSNAME = 'YourTable',
@Schema SYSNAME = 'dbo',
@Rows   INT;

SELECT dbo.TableRowCount( @Table, @Schema )

SELECT dbo.TableRowCount( @Table, DEFAULT )

EXECUTE @Rows = dbo.TableRowCount @Table

SELECT @Rows

You can also use time.clock() It counts the time used by the process on Unix and time since the first call to it on Windows. It's more precise than time.time().

It's the usually used function to measure performance.

Just call

import time
t_ = time.clock()
#Your code here
print 'Time in function', time.clock() - t_

EDITED: Ups, I miss the question as you want to know exactly the time, not the time spent...

Using webpack with sass-loader I can use ~ to refer to the project root path. E.g assuming OPs folder structure and that you're in a file inside sub_directory_b:

@import "~sub_directory_a/_common";

Documentation: https://github.com/webpack-contrib/sass-loader#resolving-import-at-rules

Connect to a database and execute the command:

SHOW data_directory;

More information:

https://www.postgresql.org/docs/current/sql-show.html https://www.postgresql.org/docs/current/runtime-config-file-locations.html

public static byte[] hexToBin(String str)
    {
        int len = str.length();
        byte[] out = new byte[len / 2];
        int endIndx;

        for (int i = 0; i < len; i = i + 2)
        {
            endIndx = i + 2;
            if (endIndx > len)
                endIndx = len - 1;
            out[i / 2] = (byte) Integer.parseInt(str.substring(i, endIndx), 16);
        }
        return out;
    }

you can use

empty($result) 

to check if the main array is empty or not.

But since you have a SimpleXMLElement object, you need to query the object if it is empty or not. See http://www.php.net/manual/en/simplexmlelement.count.php

ex:

if (empty($result) || !isset($result['Tags'])) {
    return false;
}
if ( !($result['Tags'] instanceof SimpleXMLElement)) {
    return false;
}
return ($result['Tags']->count());

The difference between Slice() and Splice() javascript build-in functions is, Slice returns removed item but did not change the original array ; like,

        // (original Array)
        let array=[1,2,3,4,5] 
        let index= array.indexOf(4)
         // index=3
        let result=array.slice(index)
        // result=4  
        // after slicing=>  array =[1,2,3,4,5]  (same as original array)

but in splice() case it affects original array; like,

         // (original Array)
        let array=[1,2,3,4,5] 
        let index= array.indexOf(4)
         // index=3
        let result=array.splice(index)
        // result=4  
        // after splicing array =[1,2,3,5]  (splicing affects original array)

You don't need to use **arr, you can either use:

void do_something(int el, std::vector<int> *arr){
    arr->push_back(el);
}

or:

 void do_something(int el, std::vector<int> &arr){
    arr.push_back(el);
}

**arr makes no sense but if you insist using it, do it this way:

void do_something(int el, std::vector<int> **arr){
    (*arr)->push_back(el);
}

but again there is no reason to do so...

The grammar of the language specifies that positional arguments appear before keyword or starred arguments in calls:

argument_list        ::=  positional_arguments ["," starred_and_keywords]
                            ["," keywords_arguments]
                          | starred_and_keywords ["," keywords_arguments]
                          | keywords_arguments

Specifically, a keyword argument looks like this: tag='insider trading!' while a positional argument looks like this: ..., exchange, .... The problem lies in that you appear to have copy/pasted the parameter list, and left some of the default values in place, which makes them look like keyword arguments rather than positional ones. This is fine, except that you then go back to using positional arguments, which is a syntax error.

Also, when an argument has a default value, such as price=None, that means you don't have to provide it. If you don't provide it, it will use the default value instead.

To resolve this error, convert your later positional arguments into keyword arguments, or, if they have default values and you don't need to use them, simply don't specify them at all:

order_id = kite.order_place(self, exchange, tradingsymbol,
    transaction_type, quantity)

# Fully positional:
order_id = kite.order_place(self, exchange, tradingsymbol, transaction_type, quantity, price, product, order_type, validity, disclosed_quantity, trigger_price, squareoff_value, stoploss_value, trailing_stoploss, variety, tag)

# Some positional, some keyword (all keywords at end):

order_id = kite.order_place(self, exchange, tradingsymbol,
    transaction_type, quantity, tag='insider trading!')

While creating the user like 'myuser'@'localhost', the user gets limited to be connected only from localhost. Create a user only for remote access and use your remote client IP address from where you will be connecting to the MySQL server. If you can bear the risk of allowing connections from all remote hosts (usually when using dynamic IP address), you can use 'myuser'@'%'. I did this, and also removed bind_address from /etc/mysql/mysql.cnf (Ubuntu) and now it connects flawlessly.

mysql> select host,user from mysql.user;
+-----------+-----------+
| host      | user      |
+-----------+-----------+
| %         | myuser    |
| localhost | mysql.sys |
| localhost | root      |
+-----------+-----------+
3 rows in set (0.00 sec)

In general software terms, an "artifact" is something produced by the software development process, whether it be software related documentation or an executable file.

In Maven terminology, the artifact is the resulting output of the maven build, generally a jar or war or other executable file. Artifacts in maven are identified by a coordinate system of groupId, artifactId, and version. Maven uses the groupId, artifactId, and version to identify dependencies (usually other jar files) needed to build and run your code.

I know this is an old question however I've found a much neater way of doing this conversion.

Java

TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 65, getResources().getDisplayMetrics());

Kotlin

TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 65f, resources.displayMetrics)

Just my 2 cents. I would create a solution which records exactly what changed, very similar to transient's solution.

My ChangesTable would simple be:

DateTime | WhoChanged | TableName | Action | ID |FieldName | OldValue

1) When an entire row is changed in the main table, lots of entries will go into this table, BUT that is very unlikely, so not a big problem (people are usually only changing one thing) 2) OldVaue (and NewValue if you want) have to be some sort of epic "anytype" since it could be any data, there might be a way to do this with RAW types or just using JSON strings to convert in and out.

Minimum data usage, stores everything you need and can be used for all tables at once. I'm researching this myself right now, but this might end up being the way I go.

For Create and Delete, just the row ID, no fields needed. On delete a flag on the main table (active?) would be good.

If you need to duplicate more than a few redirects, you might consider using a map:

# map is outside of server block
map $uri $redirect_uri {
    ~^/issue1/?$    http://example.com/shop/issues/custom_isse_name1;
    ~^/issue2/?$    http://example.com/shop/issues/custom_isse_name2;
    ~^/issue3/?$    http://example.com/shop/issues/custom_isse_name3;
    # ... or put these in an included file
}

location / {
    try_files $uri $uri/ @redirect-map;
}

location @redirect-map {
    if ($redirect_uri) {  # redirect if the variable is defined
        return 301 $redirect_uri;
    }
}

You can now do this in most "modern" browsers!

Here is the original article I read (posted July 10, 2010): HTML5: Changing the browser-URL without refreshing page.

For a more in-depth look into pushState/replaceState/popstate (aka the HTML5 History API) see the MDN docs.

TL;DR, you can do this:

window.history.pushState("object or string", "Title", "/new-url");

See my answer to Modify the URL without reloading the page for a basic how-to.

AArch64 is the 64-bit state introduced in the Armv8-A architecture (https://en.wikipedia.org/wiki/ARM_architecture#ARMv8-A). The 32-bit state which is backwards compatible with Armv7-A and previous 32-bit Arm architectures is referred to as AArch32. Therefore the GNU triplet for the 64-bit ISA is aarch64. The Linux kernel community chose to call their port of the kernel to this architecture arm64 rather than aarch64, so that's where some of the arm64 usage comes from.

As far as I know the Apple backend for aarch64 was called arm64 whereas the LLVM community-developed backend was called aarch64 (as it is the canonical name for the 64-bit ISA) and later the two were merged and the backend now is called aarch64.

So AArch64 and ARM64 refer to the same thing.

Try this:

string fileName = Path.GetFileNameWithoutExtension(@"C:\Program Files\hello.txt");

This will return "hello" for fileName.

It sounds like you want an image button:

<input type="image" src="logg.png" name="saveForm" class="btTxt submit" id="saveForm" />

Alternatively, you can use CSS to make the existing submit button use your image as its background.

In any case, you don't want a separate <img /> element on the page.

you can do it like this:

cell[B1]: 0:04:58.727

cell[B2]: =FIND(".";B1)

cell[B3]: =LEFT(B1;B2-7)

cell[B4]: =MID(B1;11-8;2)

cell[B5]: =RIGHT(B1;6)

cell[B6]: =B3*3600000+B4*60000+B5

maybe you have to multiply B5 also with 1000.

=FIND(".";B1) is only necessary because you might have inputs like '0:04:58.727' or '10:04:58.727' with different length.

.NET 2.0 ignoring name resolving, and with proper resource-disposal, indentation, preserve-whitespace and custom encoding:

public static string Beautify(System.Xml.XmlDocument doc)
{
    string strRetValue = null;
    System.Text.Encoding enc = System.Text.Encoding.UTF8;
    // enc = new System.Text.UTF8Encoding(false);

    System.Xml.XmlWriterSettings xmlWriterSettings = new System.Xml.XmlWriterSettings();
    xmlWriterSettings.Encoding = enc;
    xmlWriterSettings.Indent = true;
    xmlWriterSettings.IndentChars = "    ";
    xmlWriterSettings.NewLineChars = "\r\n";
    xmlWriterSettings.NewLineHandling = System.Xml.NewLineHandling.Replace;
    //xmlWriterSettings.OmitXmlDeclaration = true;
    xmlWriterSettings.ConformanceLevel = System.Xml.ConformanceLevel.Document;


    using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
    {
        using (System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(ms, xmlWriterSettings))
        {
            doc.Save(writer);
            writer.Flush();
            ms.Flush();

            writer.Close();
        } // End Using writer

        ms.Position = 0;
        using (System.IO.StreamReader sr = new System.IO.StreamReader(ms, enc))
        {
            // Extract the text from the StreamReader.
            strRetValue = sr.ReadToEnd();

            sr.Close();
        } // End Using sr

        ms.Close();
    } // End Using ms


    /*
    System.Text.StringBuilder sb = new System.Text.StringBuilder(); // Always yields UTF-16, no matter the set encoding
    using (System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(sb, settings))
    {
        doc.Save(writer);
        writer.Close();
    } // End Using writer
    strRetValue = sb.ToString();
    sb.Length = 0;
    sb = null;
    */

    xmlWriterSettings = null;
    return strRetValue;
} // End Function Beautify

Usage:

System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
xmlDoc.XmlResolver = null;
xmlDoc.PreserveWhitespace = true;
xmlDoc.Load("C:\Test.svg");
string SVG = Beautify(xmlDoc);

In general error is which nobody can control or guess when it occurs.Exception can be guessed and can be handled. In Java Exception and Error are sub class of Throwable.It is differentiated based on the program control.Error such as OutOfMemory Error which no programmer can guess and can handle it.It depends on dynamically based on architectire,OS and server configuration.Where as Exception programmer can handle it and can avoid application's misbehavior.For example if your code is looking for a file which is not available then IOException is thrown.Such instances programmer can guess and can handle it.

If you need to convert some of them to numbers and don't know in advance which ones, some additional code will be needed. Try something like this:

b = []
for x in a:
    temp = []
    items = x.split(",")
    for item in items:
        try:
            n = int(item)
        except ValueError:
            temp.append(item)
        else:
            temp.append(n)
    b.append(temp)

This is longer than the other answers, but it's more versatile.

If you need to loop inside a directory recursively for a particular kind of file, use the below command, which filters all the files of doc file type

$fileNames = Get-ChildItem -Path $scriptPath -Recurse -Include *.doc

If you need to do the filteration on multiple types, use the below command.

$fileNames = Get-ChildItem -Path $scriptPath -Recurse -Include *.doc,*.pdf

Now $fileNames variable act as an array from which you can loop and apply your business logic.

Starting from scratch function has Some Memory Address From Where They start executing. In Assembly Language They Are called as (call "function's memory address").Now come back to C If function has a memory address then they can be manipulated by Pointers in C.So By the rules of C

1.First you need to declare a pointer to function 2.Pass the Address of the Desired function

****Note->the functions should be of same type****

This Simple Programme will Illustrate Every Thing.

#include<stdio.h>
void (*print)() ;//Declare a  Function Pointers
void sayhello();//Declare The Function Whose Address is to be passed
                //The Functions should Be of Same Type
int main()
{
 print=sayhello;//Addressof sayhello is assigned to print
 print();//print Does A call To The Function 
 return 0;
}

void sayhello()
{
 printf("\n Hello World");
}

After That lets See How machine Understands Them.Glimpse of machine instruction of the above programme in 32 bit architecture.

The red mark area is showing how the address is being exchanged and storing in eax. Then their is a call instruction on eax. eax contains the desired address of the function.

You are trying to read xls with explicit implementation poi classes for xlsx.

G:\Selenium Jar Files\TestData\Data.xls

Either use HSSFWorkbook and HSSFSheet classes or make your implementation more generic by using shared interfaces, like;

Change:

XSSFWorkbook workbook = new XSSFWorkbook(file);

To:

 org.apache.poi.ss.usermodel.Workbook workbook = WorkbookFactory.create(file);

And Change:

XSSFSheet sheet = workbook.getSheetAt(0);

To:

org.apache.poi.ss.usermodel.Sheet sheet = workbook.getSheetAt(0);

Following code worked for me:

import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.springframework.beans.factory.annotation.Autowired;

public class SomeClass {

    @Autowired
    private WebDriver driver;

     public void LogInSuperAdmin() {
        ((JavascriptExecutor) driver).executeScript("console.log('Test test');");
     }
}

Improving the first answer just get rid of the padding and add line-height and vertical-align:

.numberCircle {
   border-radius: 50%;       

   width: 36px;
   height: 36px;
   line-height: 36px;
   vertical-align:middle;

   background: #fff;
   border: 2px solid #666;
   color: #666;

   text-align: center;
   font: 32px Arial, sans-serif;
}

To reduce the lag i would recommend the follwing steps

my pc specs : 2 gb ram, processor: intel core2 duo

first kill all background process, if you have server or database running you could stop them first with following commands

sudo service apache2 stop

sudo service mysql stop

Then enable power saving mode in android studio by file>powersaving mode

It could disable background process, and then studio appears to go well

The body element takes the available width, which is usually your browser viewport. As such, it will be different dimensions cross browser due to browser chrome borders, scrollbars, vertical space being take up by menus and whatnot...

The fact that the heights also vary, also tells me you set the body/html height to 100% through css since the height is usually dependant on elements inside the body..

Unless you set the width of the body element to a fixed value through css or it's style property, it's dimensions will as a rule, always vary cross browsers/versions and perhaps even depending on plugins you installed for the browser. Constant values in such a case is more an exception to the rule...

When you invoke .clientWidth on other elements that do not take the automatic width of the browser viewport, it will always return the elements 'width' + 'padding'. So a div with width 200 and a padding of 20 will have clientWidth = 240 (20 padding left and right).

The main reason however, why one would invoke clientWidth, is exactly due to possible expected discrepancies in results. If you know you will get a constant width and the value is known, then invoking clientWidth is redundant...

Yes - just explicitly provide the path to java.exe. For instance:

c:\Users\Jon\Test>"c:\Program Files\java\jdk1.6.0_03\bin\java.exe" -version
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)

c:\Users\Jon\Test>"c:\Program Files\java\jdk1.6.0_12\bin\java.exe" -version
java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode, sharing)

The easiest way to do this for a running command shell is something like:

set PATH=c:\Program Files\Java\jdk1.6.0_03\bin;%PATH%

For example, here's a complete session showing my default JVM, then the change to the path, then the new one:

c:\Users\Jon\Test>java -version
java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode, sharing)

c:\Users\Jon\Test>set PATH=c:\Program Files\Java\jdk1.6.0_03\bin;%PATH%

c:\Users\Jon\Test>java -version
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)

This won't change programs which explicitly use JAVA_HOME though.

Note that if you get the wrong directory in the path - including one that doesn't exist - you won't get any errors, it will effectively just be ignored.

You can declare a function to enable/disable all of the form control:

  toggleDisableFormControl(value: Boolean, exclude = []) {
    const state = value ? 'disable' : 'enable';
    Object.keys(this.profileForm.controls).forEach((controlName) => {
      if (!exclude.includes(controlName))
        this.profileForm.controls[controlName][state]();
    });
  }

and use it like this

this.toggleDisableFormControl(true, ['email']);
// disbale all field but email

Here is a good short video explanation: https://www.youtube.com/watch?v=Acm-MD_6934

According to Ecma International Identifier Names are tokens that are interpreted according to the grammar given in the “Identifiers” section of chapter 5 of the Unicode standard, with some small modifications. An Identifier is an IdentifierName that is not a ReservedWord (see 7.6.1). The Unicode identifier grammar is based on both normative and informative character categories specified by the Unicode Standard. The characters in the specified categories in version 3.0 of the Unicode standard must be treated as in those categories by all conforming ECMAScript implementations.this standard specifies specific character additions:

The dollar sign ($) and the underscore (_) are permitted anywhere in an IdentifierName.

Further reading can be found on: http://www.ecma-international.org/ecma-262/5.1/#sec-7.6

Ecma International is an industry association founded in 1961 and dedicated to the standardization of Information and Communication Technology (ICT) and Consumer Electronics (CE).

You can try something like below

$($.parseHTML(<<table html string variable here>>)).find("td:contains('<<some text to find>>')").first().prev().text();

I'm using VsCode and solved this issue by stopping the application server and them run npm install. There are files that were locked by the application server.

No need to close the IDE, just make sure there's no another process locking some files on your projects.

I did this once for my project, to close one application and open another application.

    System.Threading.Thread newThread;
    Form1 frmNewForm = new Form1;

   newThread = new System.Threading.Thread(new System.Threading.ThreadStart(frmNewFormThread));
this.Close();
        newThread.SetApartmentState(System.Threading.ApartmentState.STA);
        newThread.Start();

And add the following Method. Your newThread.Start will call this method.

    public void frmNewFormThread)()
    {

        Application.Run(frmNewForm);

    }

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.

It's slow. It's platform dependent. It's insecure.

First: What it does. Calling "system" is literally like typing a command into the windows command prompt. There is a ton of setup and teardown for your application to make such a call - and the overhead is simply ridiculous.

What if a program called "pause" was placed into the user's PATH? Just calling system("pause") only guarantees that a program called "pause" is executed (hope that you don't have your executable named "pause"!)

Simply write your own "Pause()" function that uses _getch. OK, sure, _getch is platform dependent as well (note: it's defined in "conio.h") - but it's much nicer than system() if you are developing on Windows and it has the same effect (though it is your responsibility to provide the text with cout or so).

Basically: why introduce so many potential problems when you can simply add two lines of code and one include and get a much more flexible mechanism?

I could figure out the problem. I was getting following warning on startup of eclipse.

The Maven Integration requires that Eclipse be running in a JDK, because a number of Maven core plugins are using jars from the JDk.

Please make sure the -vm option in eclipse.ini is pointing to a JDK and verify that
Installed JRE's are also using JDK installs

I changed eclipse.ini file and added following and restarted eclipse

-vm
C:/Program Files/java/jdk1.6.0_21/bin/javaw.exe

Now I can see "Maven Dependency" library included automatically in java build path.

In case of exporting lll list of lists of lists to .csv, this will work in Python3:

import csv
with open("output.csv", "w") as f:
    writer = csv.writer(f)
    for element in lll:
        writer.writerows(element)

I think what you want is not to override the back button (that just doesn't seem like a good idea - Android OS defines that behavior, why change it?), but to use the Activity Lifecycle and persist your settings/data in the onSaveInstanceState(Bundle) event.

@Override
onSaveInstanceState(Bundle frozenState) {
    frozenState.putSerializable("object_key",
        someSerializableClassYouWantToPersist);
    // etc. until you have everything important stored in the bundle
}

Then you use onCreate(Bundle) to get everything out of that persisted bundle and recreate your state.

@Override
onCreate(Bundle savedInstanceState) {
    if(savedInstanceState!=null){ //It could be null if starting the app.
        mCustomObject = savedInstanceState.getSerializable("object_key");
    }
    // etc. until you have reloaded everything you stored
}

Consider the above psuedo-code to point you in the right direction. Reading up on the Activity Lifecycle should help you determine the best way to accomplish what you're looking for.

In more modern browsers (including IE 10+) you can now use calc():

.moveto {
  top: 0px;
  left: calc(100% - 50px);
}

This can be fixed by inserting the respective records in the Parent table first and then we can insert records in the Child table's respective column. Also check the data type and size of the column. It should be same as the parent table column,even the engine and collation should also be the same. TRY THIS! This is how I solved mine. Correct me if am wrong.

Steps to follow :

step-1 : git reset --hard HEAD  (if you want to reset it to head)
step-2 : git checkout Master 
step-3 : git branch -D <branch Name>
(Remote Branch name where you want to get pull) 
step-4 : git checkout <branch name>
step-5 : git pull. (now you will not get any
error)

Thanks, Sarbasish

In ES6, use Array.from:

function foo()
  {
  foo.bar = Array.from(arguments);
  foo.baz = foo.bar.join();
  }

foo(1,2,3,4,5,6,7);
foo.bar // Array [1, 2, 3, 4, 5, 6, 7]
foo.baz // "1,2,3,4,5,6,7"

function foo()
  {
  foo.bar = JSON.stringify(arguments); 
  foo.baz = JSON.parse(foo.bar); 
  }

/* Atomic Data */
foo(1,2,3,4,5,6,7);
foo.bar // "{"0":1,"1":2,"2":3,"3":4,"4":5,"5":6,"6":7}"
foo.baz // [object Object]

/* Structured Data */
foo({1:2},[3,4],/5,6/,Date())
foo.bar //"{"0":{"1":2},"1":[3,4],"2":{},"3":"Tue Dec 17 2013 16:25:44 GMT-0800 (Pacific Standard Time)"}"
foo.baz // [object Object]

If preservation is needed instead of stringification, use the internal structured cloning algorithm.

If DOM nodes are passed, use XMLSerializer as in an unrelated question.

with (new XMLSerializer()) {serializeToString(document.documentElement) }

If running as a bookmarklet, you may need to wrap the each structured data argument in an Error constructor for JSON.stringify to work properly.

References

• Structure Clone CommonJS Module

• JS Object Clone

• MDN: Array.from()

The easier way to do it is just:

ul li:after {
    content: url('../images/small_triangle.png');
}

Sorted set:

return new TreeSet(setIWantSorted);

or:

return new ArrayList(new TreeSet(setIWantSorted));

In The Java Plugin:

$ gradle tasks

Build tasks
-----------
assemble - Assembles the outputs of this project.
build - Assembles and tests this project.
testClasses - Assembles test classes.

Verification tasks
------------------
test - Runs the unit tests.

Gradle build without test you have two options:

$ gradle assemble
$ gradle build -x test

but if you want compile test:

$ gradle assemble testClasses
$ gradle testClasses

Bootstrap Disabled Link

<a href="#" class="btn btn-primary btn-lg disabled" role="button">Primary link</a>

<a href="#" class="btn btn-default btn-lg disabled" role="button">Link</a>

Bootstrap Disabled Button but it looks like link

<button type="button" class="btn btn-link">Link</button>

You just use dangerouslySetInnerHTML method of React

<div dangerouslySetInnerHTML={{ __html: htmlString }} />

Or you can implement more with this easy way: Render the HTML raw in React app

You can also simply use http authentication with Digest (Here some infos if you use Apache httpd, Apache Tomcat, and here an explanation of digest).

With Java, for interesting informations, take a look at :

• Understanding Login Authentication
• HTTP Digest Authentication Request & Response Examples
• HTTP Authentication Woes
• Basic Authentication For JSP Page (it's not digest, but I think it's an interesting source)

You can add property to your model as follows:

    public string DetailsClass { get { return Details.Count > 0 ? "show" : "hide" } }

and then your view will be simpler and will contain no logic at all:

    <div class="details @Model.DetailsClass"/>

This will work even with many classes and will not render class if it is null:

    <div class="@Model.Class1 @Model.Class2"/>

with 2 not null properties will render:

    <div class="class1 class2"/>

if class1 is null

    <div class=" class2"/>

You could convert the dataframe to be a single column with stack (this changes the shape from 5x3 to 15x1) and then take the standard deviation:

df.stack().std()         # pandas default degrees of freedom is one

Alternatively, you can use values to convert from a pandas dataframe to a numpy array before taking the standard deviation:

df.values.std(ddof=1)    # numpy default degrees of freedom is zero

Unlike pandas, numpy will give the standard deviation of the entire array by default, so there is no need to reshape before taking the standard deviation.

A couple of additional notes:

• The numpy approach here is a bit faster than the pandas one, which is generally true when you have the option to accomplish the same thing with either numpy or pandas. The speed difference will depend on the size of your data, but numpy was roughly 10x faster when I tested a few different sized dataframes on my laptop (numpy version 1.15.4 and pandas version 0.23.4).

• The numpy and pandas approaches here will not give exactly the same answers, but will be extremely close (identical at several digits of precision). The discrepancy is due to slight differences in implementation behind the scenes that affect how the floating point values get rounded.

Make sure that you don't declare it as a integer, float, string or boolean before. http://php.net/manual/en/function.is-scalar.php

You need a gutter between two div gutter can be made as following

margin(gutter) = width - gutter size E.g margin = calc(70% - 2em)

<body bgcolor="gray">
<section id="main">
        <div id="left">
            Something here     
        </div>
        <div id="right">
                Someone there
        </div>
</section>
</body>
<style>
body{
    font-size: 10px;
}

#main div{
    float: left;
    background-color:#ffffff;
    width: calc(50% - 1.5em);
    margin-left: 1.5em;
}
</style>

You want to use:

git checkout --ours foo/bar.java
git add foo/bar.java

If you rebase a branch feature_x against main (i.e. running git rebase main while on branch feature_x), during rebasing ours refers to main and theirs to feature_x.

As pointed out in the git-rebase docs:

Note that a rebase merge works by replaying each commit from the working branch on top of the branch. Because of this, when a merge conflict happens, the side reported as ours is the so-far rebased series, starting with <upstream>, and theirs is the working branch. In other words, the sides are swapped.

For further details read this thread.

First of all you have to connect with your database like

my database is ubuntu

use this command to connect

 \c ubuntu

This message will show

"You are now connected to database "ubuntu" as user "postgres"."

Now

Run this command to show all tables in it

\d+

Open a terminal and type: java -version, or javac -version.

If you have all the latest updates for Snow Leopard, you should be running JDK 1.6.0_20 at this moment (the same as Oracle's current JDK version).

I wrote serialijse because I faced the same problem as you.

you can find it at https://github.com/erossignon/serialijse

It can be used in nodejs or in a browser and can serve to serialize and deserialize a complex set of objects from one context (nodejs) to the other (browser) or vice-versa.

var s = require("serialijse");


var assert = require("assert");


// testing serialization of a simple javascript object with date
function testing_javascript_serialization_object_with_date() {

    var o = {
        date: new Date(),
        name: "foo"
    };
    console.log(o.name, o.date.toISOString());

    // JSON will fail as JSON doesn't preserve dates
    try {
        var jstr = JSON.stringify(o);
        var jo = JSON.parse(jstr);
        console.log(jo.name, jo.date.toISOString());
    } catch (err) {
        console.log(" JSON has failed to preserve Date during stringify/parse ");
        console.log("  and has generated the following error message", err.message);
    }
    console.log("");



    var str = s.serialize(o);
    var so = s.deserialize(str);
    console.log(" However Serialijse knows how to preserve date during serialization/deserialization :");
    console.log(so.name, so.date.toISOString());
    console.log("");
}
testing_javascript_serialization_object_with_date();


// serializing a instance of a class
function testing_javascript_serialization_instance_of_a_class() {

    function Person() {
        this.firstName = "Joe";
        this.lastName = "Doe";
        this.age = 42;
    }

    Person.prototype.fullName = function () {
        return this.firstName + " " + this.lastName;
    };


    // testing serialization using  JSON.stringify/JSON.parse
    var o = new Person();
    console.log(o.fullName(), " age=", o.age);

    try {
        var jstr = JSON.stringify(o);
        var jo = JSON.parse(jstr);
        console.log(jo.fullName(), " age=", jo.age);

    } catch (err) {
        console.log(" JSON has failed to preserve the object class ");
        console.log("  and has generated the following error message", err.message);
    }
    console.log("");

    // now testing serialization using serialijse  serialize/deserialize
    s.declarePersistable(Person);
    var str = s.serialize(o);
    var so = s.deserialize(str);

    console.log(" However Serialijse knows how to preserve object classes serialization/deserialization :");
    console.log(so.fullName(), " age=", so.age);
}
testing_javascript_serialization_instance_of_a_class();


// serializing an object with cyclic dependencies
function testing_javascript_serialization_objects_with_cyclic_dependencies() {

    var Mary = { name: "Mary", friends: [] };
    var Bob = { name: "Bob", friends: [] };

    Mary.friends.push(Bob);
    Bob.friends.push(Mary);

    var group = [ Mary, Bob];
    console.log(group);

    // testing serialization using  JSON.stringify/JSON.parse
    try {
        var jstr = JSON.stringify(group);
        var jo = JSON.parse(jstr);
        console.log(jo);

    } catch (err) {
        console.log(" JSON has failed to manage object with cyclic deps");
        console.log("  and has generated the following error message", err.message);
    }

    // now testing serialization using serialijse  serialize/deserialize
    var str = s.serialize(group);
    var so = s.deserialize(str);
    console.log(" However Serialijse knows to manage object with cyclic deps !");
    console.log(so);
    assert(so[0].friends[0] == so[1]); // Mary's friend is Bob
}
testing_javascript_serialization_objects_with_cyclic_dependencies();

Simple and wrong way would be combine two columns using + or concatenate and make one columns.

Select *
from XX
where col1+col2 in (Select col1+col2 from YY)

This would be offcourse pretty slow. Can not be used in programming but if in case you are just querying for verifying something may be used.

Turn off your firewall for port 80 from any address. Turn off 443 if you need https (SSL) access. Open the configuration file (http.conf) and find the lines that say:

Allow from 127.0.0.1

Change them to read

Allow from all

Restart the wampserver. It will now work. Enjoy!!

I've seen this exception before when whatever the JVM considers to be a temp directory is not accessible due to not being there or not having permission to write.

printf("%.<number>f", myFloat) //where <number> - digit after comma

http://www.cplusplus.com/reference/clibrary/cstdio/printf/

What worked for me was

git reset HEAD app/views/data/landingpage.js.erb
git restore app/views/data/landingpage.js.erb

where the file I wanted to restore was app/views/data/landingpage.js.erb

For me it was the differences between import and require on ES6.

E.g.

// processor.js
class Processor {

}

export default Processor

//index.js
const Processor = require('./processor');
const processor = new Processor() //fails with the error

import Processor from './processor'
const processor = new Processor() // succeeds

There is collection of Func<...> classes - Func that is probably what you are looking for:

 void MyMethod(Func<int> param1 = null) 

This defines method that have parameter param1 with default value null (similar to AS), and a function that returns int. Unlike AS in C# you need to specify type of the function's arguments.

So if you AS usage was

MyMethod(function(intArg, stringArg) { return true; }) 

Than in C# it would require param1 to be of type Func<int, siring, bool> and usage like

MyMethod( (intArg, stringArg) => { return true;} ); 

Here's another way:

cd. > filename

Event listeners

First off it's important to understand that there are two kinds of "event listeners":

1. Scope event listeners registered via $on:

   $scope.$on('anEvent', function (event, data) {
     ...
   });
   

2. Event handlers attached to elements via for example on or bind:

   element.on('click', function (event) {
     ...
   });
   

$scope.$destroy()

When $scope.$destroy() is executed it will remove all listeners registered via $on on that $scope.

It will not remove DOM elements or any attached event handlers of the second kind.

This means that calling $scope.$destroy() manually from example within a directive's link function will not remove a handler attached via for example element.on, nor the DOM element itself.

element.remove()

Note that remove is a jqLite method (or a jQuery method if jQuery is loaded before AngularjS) and is not available on a standard DOM Element Object.

When element.remove() is executed that element and all of its children will be removed from the DOM together will all event handlers attached via for example element.on.

It will not destroy the $scope associated with the element.

To make it more confusing there is also a jQuery event called $destroy. Sometimes when working with third-party jQuery libraries that remove elements, or if you remove them manually, you might need to perform clean up when that happens:

element.on('$destroy', function () {
  scope.$destroy();
});

What to do when a directive is "destroyed"

This depends on how the directive is "destroyed".

A normal case is that a directive is destroyed because ng-view changes the current view. When this happens the ng-view directive will destroy the associated $scope, sever all the references to its parent scope and call remove() on the element.

This means that if that view contains a directive with this in its link function when it's destroyed by ng-view:

scope.$on('anEvent', function () {
 ...
});

element.on('click', function () {
 ...
});

Both event listeners will be removed automatically.

However, it's important to note that the code inside these listeners can still cause memory leaks, for example if you have achieved the common JS memory leak pattern circular references.

Even in this normal case of a directive getting destroyed due to a view changing there are things you might need to manually clean up.

For example if you have registered a listener on $rootScope:

var unregisterFn = $rootScope.$on('anEvent', function () {});

scope.$on('$destroy', unregisterFn);

This is needed since $rootScope is never destroyed during the lifetime of the application.

The same goes if you are using another pub/sub implementation that doesn't automatically perform the necessary cleanup when the $scope is destroyed, or if your directive passes callbacks to services.

Another situation would be to cancel $interval/$timeout:

var promise = $interval(function () {}, 1000);

scope.$on('$destroy', function () {
  $interval.cancel(promise);
});

If your directive attaches event handlers to elements for example outside the current view, you need to manually clean those up as well:

var windowClick = function () {
   ...
};

angular.element(window).on('click', windowClick);

scope.$on('$destroy', function () {
  angular.element(window).off('click', windowClick);
});

These were some examples of what to do when directives are "destroyed" by Angular, for example by ng-view or ng-if.

If you have custom directives that manage the lifecycle of DOM elements etc. it will of course get more complex.

I use this:

if ($('.div1').size() || $('.div2').size()) {
    console.log('ok');
}

The calculation is simple

if you want to add 1 hour in the date .

every day have 24 hour , you can add .

select sysdate + 1/24 from dual; 

if you want 1 day to add

select sysdate + 24/24 from dual; 

or 

select sysdate + 1 from dual; 

same as for 2, 3 , 4 day

For static date you have the answer below.

You missed the * in front of NgIf (like we all have, dozens of times):

<div *ngIf="answer.accepted">&#10004;</div>

Without the *, Angular sees that the ngIf directive is being applied to the div element, but since there is no * or <template> tag, it is unable to locate a template, hence the error.

If you get this error with Angular v5:

Error: StaticInjectorError[TemplateRef]:
  StaticInjectorError[TemplateRef]:
    NullInjectorError: No provider for TemplateRef!

You may have <template>...</template> in one or more of your component templates. Change/update the tag to <ng-template>...</ng-template>.

Static method never allows a non-static method call directly.

Reason: Static method belongs to its class only, and to nay object or any instance.

So, whenever you try to access any non-static method from static method inside the same class: you will receive:

"An object reference is required for the non-static field, method or property".

Solution: Just declare a reference like:

public class <classname>
{
static method()
{
   new <classname>.non-static();
}

non-static method()
{

}


}

Another way, that in my opinion is much cleaner, is to make a synchronous Ajax request instead of using a <script> tag. Which is also how Node.js handles includes.

Here's an example using jQuery:

function require(script) {
    $.ajax({
        url: script,
        dataType: "script",
        async: false,           // <-- This is the key
        success: function () {
            // all good...
        },
        error: function () {
            throw new Error("Could not load script " + script);
        }
    });
}

You can then use it in your code as you'd usually use an include:

require("/scripts/subscript.js");

And be able to call a function from the required script in the next line:

subscript.doSomethingCool(); 

You probably redefined your "sum" function to be an integer data type. So it is rightly telling you that an integer is not something you can pass a range.

To fix this, restart your interpreter.

Python 2.7.3 (default, Apr 20 2012, 22:44:07) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> data1 = range(0, 1000, 3)
>>> data2 = range(0, 1000, 5)
>>> data3 = list(set(data1 + data2)) # makes new list without duplicates
>>> total = sum(data3) # calculate sum of data3 list's elements
>>> print total
233168

If you shadow the sum builtin, you can get the error you are seeing

>>> sum = 0
>>> total = sum(data3) # calculate sum of data3 list's elements
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not callable

Also, note that sum will work fine on the set there is no need to convert it to a list

I was finding the same error complaining about mixing google play services version when switching from 8.3 to 8.4. Bizarrely I saw reference to the app-measurement lib which I wasn't using.

I thought maybe one of my app's dependencies was referencing the older version so I ran ./gradlew app:dependencies to find the offending library (non were).

But at the top of task output I found a error message saying that the google plugin could not be found and defaulting to google play services 8.3. I used the sample project @TheYann linked to compare. My setup was identical except I applied the apply plugin: 'com.google.gms.google-services' at the top my app's build.gradle file. I moved to bottom of the file and that fixed the gradle compile error.

int main () //start of main fcn
{

    int values[ 20 ]; //delcares array and how many elements
    int small,big; //declares integer
     for ( int i = 0; i < 20; i++ ) //counts to 20 and prompts user for value and stores it
    {
        cout << "Enter value " << i << ": ";
        cin >> values[i];
    }
    big=small=values[0]; //assigns element to be highest or lowest value
    for (int i = 0; i < 20; i++) //works out bigggest number
    {
        if(values[i]>big) //compare biggest value with current element
        {
            big=values[i];
        }
         if(values[i]<small) //compares smallest value with current element
        {
            small=values[i];
        }
    }
     cout << "The biggest number is " << big << endl; //prints outs biggest no
    cout << "The smallest number is " << small << endl; //prints out smalles no
}

pip install numpy scipy scikit-learn

if you don't have pip, install it using

python get-pip.py

Download get-pip.py from the following link. or use curl to download it.

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

Just adding that using the first approach it can be done as -

pd.DataFrame(list(map(list, zip(lst1,lst2,lst3))))

You can add security provider by editing java.security with using following code with creating static block:

static {
    Security.addProvider(new BouncyCastleProvider());
}

If you are using maven project, then you will have to add dependency for BouncyCastleProvider as follows in pom.xml file of your project.

<dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk15on</artifactId>
            <version>1.47</version>
</dependency>

If you are using normal java project, then you can add download bcprov-jdk15on-147.jar from the link given below and edit your classpath.

http://www.java2s.com/Code/Jar/b/Downloadbcprovextjdk15on147jar.htm

In SQL Server 2008 you can insert multiple rows using a single SQL INSERT statement.

INSERT INTO MyTable ( Column1, Column2 ) VALUES
( Value1, Value2 ), ( Value1, Value2 )

For reference to this have a look at MOC Course 2778A - Writing SQL Queries in SQL Server 2008.

For example:

INSERT INTO MyTable
  ( Column1, Column2, Column3 )
VALUES
  ('John', 123, 'Lloyds Office'), 
  ('Jane', 124, 'Lloyds Office'), 
  ('Billy', 125, 'London Office'),
  ('Miranda', 126, 'Bristol Office');

If you're on or updated to Laravel 5.4 This worked for me;

Just 1 change. in AppServiceProvider.php

use Illuminate\Support\Facades\Schema;

public function boot()
{
  Schema::defaultStringLength(191);
}

As mentioned in the migrate guide https://laravel.com/docs/master/migrations#creating-indexes

Simply use the macros from <float.h> and the variable-width conversion specifier (".*"):

float f = 3.14159265358979323846;
printf("%.*f\n", FLT_DIG, f);

The file permission is okay (0777) but i think your on the shared server, so to delete your file correctly use; 1. create a correct path to your file

// delete from folder
$filename = 'test.txt';
$ifile = '/newy/made/link/uploads/'. $filename; // this is the actual path to the file you want to delete.
unlink($_SERVER['DOCUMENT_ROOT'] .$ifile); // use server document root
// your file will be removed from the folder

That small code will do the magic and remove any selected file you want from any folder provided the actual file path is collect.

In the logging world there are Facades (like Apache Commons Logging, slf4j or even the Log4j 2.0 API) and implementations (Log4j 1 + 2, java.util.logging, TinyLog, Logback).

Basically you should replace your selfmade wrapper with slf4j IF and only IF you are not happy with it for some reason. While Apache Commons Logging is not really providing a modern API, slf4j and the new Log4j 2 facade is providing that. Given that quite a bunch of apps use slf4j as a wrapper it might make sense to use that.

slf4j gives a number of nice API sugar, like this example from slf4j docs:

logger.debug("Temperature set to {}. Old temperature was {}.", t, oldT);

It's variable substitution. This is also supported by Log4j 2.

However you need to be aware that slf4j is developed by QOS who also maintain logback. Log4j 2.0 is baked in the Apache Software Foundation. In the past three years a vibrant and active community has grown there again. If you appreciate Open Source as it is done by the Apache Software Foundation with all its guarantees you might reconsider using slf4j in favor to use Log4j 2 directly.

Please note:

In the past log4j 1 was not actively maintained while Logback was. But today things are different. Log4j 2 is actively maintained and releases on almost regular schedule. It also includes lot of modern features and -imho- makes a couple of things better than Logback. This is sometimes just a matter of taste and you should draw your own conclusions.

I wrote a quick overview on the new Features of Log4j 2.0: http://www.grobmeier.de/the-new-log4j-2-0-05122012.html

When reading you will see that Log4j 2 was inspired by Logback but also by other logging frameworks. But the code base is different; it shares almost nothing with Log4j 1 and zero with Logback. This lead to some improvements like in example Log4j 2 operates with bytestreams instead of Strings under the hood. Also it doesn't loose events while reconfiguring.

Log4j 2 can log with higher speed than other frameworks I know: http://www.grobmeier.de/log4j-2-performance-close-to-insane-20072013.html

And still the user community seems to be much bigger than Logbacks: http://www.grobmeier.de/apache-log4j-is-the-leading-logging-framework-06082013.html

That all said the best idea is you choose the logging frameworks which just fits best to what you want to achieve. I would not switch a full framework if I would disable logging in production environment and just perform basic logging in my app. However if you do a bit more with logging just look at the features which are provided by the frameworks and their developers. While you get commercial support for Logback through QOS (i heard) there is currently no commercial support for Log4j 2. On the other hand if you need to do audit logging and need high performance provided by the async appenders it makes a lot of sense to check log4j 2.

Please note despite all comfort they provide, facades always eat a little performance. It's maybe not affecting you at all, but if you are on low resources you may need to save everything you can have.

Without knowing you requirements better it is almost impossible to give a recommendation. Just: don't switch just because a lot of people switch. Switch only because you see value of it. And the argumentation that log4j is dead doesn't count anymore. It's alive, and it's hot.

DISCLAIMER: I am currently VP, Apache Logging Services and involved in log4j as well.

As an additional technique, if you have the private repository cloned locally, you can do:

pip install git+file://c:/repo/directory

More modernly, you can just do this (and the -e will mean you don't have to commit changes before they're reflected):

pip install -e C:\repo\directory

Use vanilla js, example

document.cookie = `referral_key=hello;max-age=604800;domain=example.com`

Read more at: https://developer.mozilla.org/en-US/docs/Web/API/Document/cookie

Please try this,

$ms = Person::where('name', 'Foo Bar')->first();
$persons = Person::order_by('list_order', 'ASC')->get();
return View::make('viewname')->with(compact('persons','ms'));

Those who are not having web.config file. Output Type other than web application. update the project file (.csproj) with below give code.

It may cause due to adding/removing the .netframework in improper way or it may broke unexpected way.

  <ItemGroup>
    <Reference Include="netstandard" />
  </ItemGroup>

Output Type

• Console application
• Class Library

Definitely don't do this, but it is an option if ... I can't think of a valid reason.

((CancellationTokenSource)cancellationToken.GetType().GetField("m_source",
    System.Reflection.BindingFlags.NonPublic |
    System.Reflection.BindingFlags.Instance
).GetValue(cancellationToken)).Cancel();

I think the issue is that you need to wrap your div in a container and/or row.

This should achieve a similar look as what you are looking for:

<div class="container">
    <div class="row" id="error-container">
         <div class="span12">  
             <div class="alert alert-error">
                <button type="button" class="close" data-dismiss="alert">×</button>
                 test error message
             </div>
         </div>
    </div>
</div>

CSS:

#error-container {
     margin-top:10px;
     position: fixed;
}

Bootply demo

The solution from the blog Prevent desktop lock or screensaver with PowerShell is working for me. Here is the relevant script, which simply sends a single period to the shell:

param($minutes = 60)

$myshell = New-Object -com "Wscript.Shell"

for ($i = 0; $i -lt $minutes; $i++) {
  Start-Sleep -Seconds 60
  $myshell.sendkeys(".")
}

and an alternative from the comments, which moves the mouse a single pixel:

$Pos = [System.Windows.Forms.Cursor]::Position
[System.Windows.Forms.Cursor]::Position = New-Object System.Drawing.Point((($Pos.X) + 1) , $Pos.Y)
$Pos = [System.Windows.Forms.Cursor]::Position
[System.Windows.Forms.Cursor]::Position = New-Object System.Drawing.Point((($Pos.X) - 1) , $Pos.Y)

You can access data attributes something like this

event.target.dataset.tag

you can use position:relative; inside #one div and position:absolute inside #two div. you can see it

if (!"success".equals(statusCheck))

Process.Start("explorer.exe" , @"C:\Users");

I had to use this, the other way of just specifying the tgt dir would shut the explorer window when my application terminated.

Window.Show will show the window, and continue execution -- it's a non-blocking call.

Window.ShowDialog will block the calling thread (kinda ^[1]), and show the dialog. It will also block interaction with the parent/owning window. When the dialog is dismissed (for whatever reason), ShowDialog will return to the caller, and will allow you to access DialogResult (if you want it).

^[1] It will keep the dispatcher pumping by pushing a dispatcher frame onto the WPF dispatcher. This will cause the message pump to keep pumping.

using System.Windows.Interop; ...

 private BitmapImage Bitmap2BitmapImage(Bitmap bitmap)
        {                
            BitmapSource i = Imaging.CreateBitmapSourceFromHBitmap(
                           bitmap.GetHbitmap(),
                           IntPtr.Zero,
                           Int32Rect.Empty,
                           BitmapSizeOptions.FromEmptyOptions());
            return (BitmapImage)i;
        }

In comments under the highly upvoted answer by @Dan H, mention is made of the powerset() recipe in the itertools documentation—including one by Dan himself. However, so far no one has posted it as an answer. Since it's probably one of the better if not the best approach to the problem—and given a little encouragement from another commenter, it's shown below. The function produces all unique combinations of the list elements of every length possible (including those containing zero and all the elements).

Note: If the, subtly different, goal is to obtain only combinations of unique elements, change the line s = list(iterable) to s = list(set(iterable)) to eliminate any duplicate elements. Regardless, the fact that the iterable is ultimately turned into a list means it will work with generators (unlike several of the other answers).

from itertools import chain, combinations

def powerset(iterable):
    "powerset([1,2,3]) --> () (1,) (2,) (3,) (1,2) (1,3) (2,3) (1,2,3)"
    s = list(iterable)  # allows duplicate elements
    return chain.from_iterable(combinations(s, r) for r in range(len(s)+1))

stuff = [1, 2, 3]
for i, combo in enumerate(powerset(stuff), 1):
    print('combo #{}: {}'.format(i, combo))

Output:

combo #1: ()
combo #2: (1,)
combo #3: (2,)
combo #4: (3,)
combo #5: (1, 2)
combo #6: (1, 3)
combo #7: (2, 3)
combo #8: (1, 2, 3)

Just call start()

new Thread()
{
    public void run() {
        System.out.println("blah");
    }
}.start();

It could be hardware. It could be something complicated...but I'd take a stab at suggesting that somewhere your threading code is not protecting some collection (such as a dictionary) with an appropriate lock.

What OS and service pack are you running?

Java objects reside in an area called the heap, while metadata such as class objects and method objects reside in the permanent generation or Perm Gen area. The permanent generation is not part of the heap.

The heap is created when the JVM starts up and may increase or decrease in size while the application runs. When the heap becomes full, garbage is collected. During the garbage collection objects that are no longer used are cleared, thus making space for new objects.

-Xmssize Specifies the initial heap size.

-Xmxsize Specifies the maximum heap size.

-XX:MaxPermSize=size Sets the maximum permanent generation space size. This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option.

Sizes are expressed in bytes. Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to indicate gigabytes.

References:

How is the java memory pool divided?

What is perm space?

Java (JVM) Memory Model – Memory Management in Java

Java 7 SE Command Line Options

Java 7 HotSpot VM Options

Run this command if your ufw(Uncomplicatd Firewall) is enabled . Add for Example port 8080

$ sudo ufw allow 8080/tcp

And you can check the status by running

$ sudo ufw status

For more info check : https://linuxhint.com/ubuntu_allow_port_firewall

easiest and fastest way to check if an Object is an Array or not.

 var arr = [];
  arr.constructor.name ==='Array'  //return true;

or

arr.constructor ===Array //return true;

or you can make a utility function:

const isArray = (obj)=> !!obj && obj.constructor ===Array;

usage:

isArray(arr); //return true

After some experimenting, I think the algorithm for LinearLayout is this:

Assume that weightSum is set to a value. The case of absence is discussed later.

First, divide the weightSum by the number of elements whith match_parent or fill_parent in the dimension of the LinearLayout (e.g. layout_width for orientation="horizontal"). We will call this value the weight multiplier for each element. The default value for weightSum is 1.0, so the default weight multiplier is 1/n, where n is the number of fill_parent elements; wrap_content elements do not contribute to n.

E.g. when weightSum is 60, and there are 3 fill_parent elements, the weight multiplier is 20. The weight multiplier is the default value for e.g. layout_width if the attribute is absent.

Second, the maximum possible expansion of every element is computed. First, the wrap_content elements are computed according to their contents. Their expansion is deducted from the expansion of the parent container. We will call the remainer expansion_remainer. This remainder is distributed among fill_parent elements according to their layout_weight.

Third, the expansion of every fill_parent element is computed as:

Example:

If weightSum is 60, and there are 3 fill_parent elements with the weigths 10, 20 and 30, their expansion on the screen is 2/3, 1/3 and 0/3 of the parent container.

weight | expansion
     0 | 3/3
    10 | 2/3
    20 | 1/3
    30 | 0/3
    40 | 0/3

The minimum expansion is capped at 0. The maximum expansion is capped at parent size, i.e. weights are capped at 0.

If an element is set to wrap_content, its expansion is calculated first, and the remaining expansion is subject to distribution among the fill_parent elements. If weightSum is set, this leads to layout_weight having no effect on wrap_content elements. However, wrap_content elements can still be pushed out of the visible area by elements whose weight is lower than (e.g. between 0-1 for weightSum= 1 or between 0-20 for the above example).

If no weightSum is specified, it is computed as the sum of all layout_weight values, including elements with wrap_content set! So having layout_weight set on wrap_content elements, can influence their expansion. E.g. a negative weight will shrink the other fill_parent elements. Before the fill_parent elements are laid out, will the above formula be applied to wrap_content elements, with maximum possible expansion being their expansion according to the wrapped content. The wrap_content elements will be shrunk, and afterwards the maximum possible expansion for the remaining fill_parent elements is computed and distributed.

This can lead to unintuitive results.

A somewhat different approach using ggplot2:

dat <- read.table(text = "A   B   C   D   E   F    G
1 480 780 431 295 670 360  190
2 720 350 377 255 340 615  345
3 460 480 179 560  60 735 1260
4 220 240 876 789 820 100   75", header = TRUE)

library(reshape2)

dat$row <- seq_len(nrow(dat))
dat2 <- melt(dat, id.vars = "row")

library(ggplot2)

ggplot(dat2, aes(x = variable, y = value, fill = row)) + 
  geom_bar(stat = "identity") +
  xlab("\nType") +
  ylab("Time\n") +
  guides(fill = FALSE) +
  theme_bw()

this gives:

When you want to include a legend, delete the guides(fill = FALSE) line.

Pawel Sawicz .NET blog has a real good explanation and example code, explaining how to call the library;

GET:

var client = new RestClient("192.168.0.1");
var request = new RestRequest("api/item/", Method.GET);
var queryResult = client.Execute<List<Items>>(request).Data;

POST:

var client = new RestClient("http://192.168.0.1");
var request = new RestRequest("api/item/", Method.POST);
request.RequestFormat = DataFormat.Json;
request.AddBody(new Item
{
   ItemName = someName,
   Price = 19.99
});
client.Execute(request);

DELETE:

var item = new Item(){//body};
var client = new RestClient("http://192.168.0.1");
var request = new RestRequest("api/item/{id}", Method.DELETE);
request.AddParameter("id", idItem);
 
client.Execute(request)

The RestSharp GitHub page has quite an exhaustive sample halfway down the page. To get started install the RestSharp NuGet package in your project, then include the necessary namespace references in your code, then above code should work (possibly negating your need for a full example application).

First, try changing <a>Link</a> to <span id=test><a>Link</a></span>.

Then, add something like this in the javascript function that you're calling:

var abc = 'somelink';
document.getElementById('test').innerHTML = '<a href="' + abc + '">Link</a>';

This way the link will look like this:

<a href="somelink">Link</a>

Inspired by the function ELT(index number, string1, string2, string3,…),I think the following example works as an array example:

set @i := 1;
while @i <= 3
do
  insert into table(val) values (ELT(@i ,'val1','val2','val3'...));
set @i = @i + 1;
end while;

Hope it help.

all the answers here that use get_headers() are doing a GET request. It's much faster/cheaper to just do a HEAD request.

To make sure that get_headers() does a HEAD request instead of a GET you should add this:

stream_context_set_default(
    array(
        'http' => array(
            'method' => 'HEAD'
        )
    )
);

so to check if a file exists, your code would look something like this:

stream_context_set_default(
    array(
        'http' => array(
            'method' => 'HEAD'
        )
    )
);
$headers = get_headers('http://website.com/dir/file.jpg', 1);
$file_found = stristr($headers[0], '200');

$file_found will return either false or true, obviously.

try using this one

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
Invoke-WebRequest -Uri https://apod.nasa.gov/apod/

To create a uniqueString based on unique identifier of device in iOS 6:

#import <AdSupport/ASIdentifierManager.h>

NSString *uniqueString = [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
NSLog(@"uniqueString: %@", uniqueString);

As pointed out, you should not be storing your users' passwords in a format that is decryptable. Reversable encryption provides an easy route for hackers to find out your users' passwords, which extends to putting your users' accounts at other sites at risk should they use the same password there.

PHP provides a pair of powerful functions for random-salted, one-way hash encryption — password_hash() and password_verify(). Because the hash is automatically random-salted, there is no way for hackers to utilize precompiled tables of password hashes to reverse-engineer the password. Set the PASSWORD_DEFAULT option and future versions of PHP will automatically use stronger algorithms to generate password hashes without you having to update your code.

An alternative using eval so avoiding use of a subshell:

sudo -s eval 'whoami; whoami'

Note: The other answers using sudo -s fail because the quotes are being passed on to bash and run as a single command so need to strip quotes with eval. eval is better explained is this SO answer

Quoting within the commands is easier too:

$ sudo -s eval 'whoami; whoami; echo "end;"'
root
root
end;

And if the commands need to stop running if one fails use double-ampersands instead of semi-colons:

$ sudo -s eval 'whoami && whoamit && echo "end;"'
root
/bin/bash: whoamit: command not found

def function(string):  
    final = ''  
    for i in string:  
        try:   
            final += str(int(i))   
        except ValueError:  
            return int(final)  
print(function("4983results should get"))  

When you run a jar, your Main class itself becomes args[0] and your filename comes immediately after.

I had the same issue: I could locate my file when provided the absolute path from eclipse (because I was referring to the file as args[0]). Yet when I run the same from jar, it was trying to locate my main class - which is when I got the idea that I should be reading my file from args[1].

Most likely it means that the open didn't fail.

When Perl opens a file, it checks whether or not the file is a TTY (so that it can answer the -T $fh filetest operator) by issuing the TCGETS ioctl against it. If the file is a regular file and not a tty, the ioctl fails and sets errno to ENOTTY (string value: "Inappropriate ioctl for device"). As ysth says, the most common reason for seeing an unexpected value in $! is checking it when it's not valid -- that is, anywhere other than immediately after a syscall failed, so testing the result codes of your operations is critically important.

If open actually did return false for you, and you found ENOTTY in $! then I would consider this a small bug (giving a useless value of $!) but I would also be very curious as to how it happened. Code and/or truss output would be nifty.

Here is a 2.0.0 version for the current document in Chrome w/ keyboard shortcut:

tasks.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "Chrome",
            "type": "process",
            "command": "chrome.exe",
            "windows": {
                "command": "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe"
            },
            "args": [
                "${file}"
            ],
            "problemMatcher": []
        }
    ]
}

keybindings.json :

{
    "key": "ctrl+g",
    "command": "workbench.action.tasks.runTask",
    "args": "Chrome"
}

For running on a webserver:

https://marketplace.visualstudio.com/items?itemName=ritwickdey.LiveServer

Try:

result= data.drop('year', 1)
result.head(5)

As of Apache POI 3.17 you will have to check if the cell is empty using enumerations:

import org.apache.poi.ss.usermodel.CellType;

if(cell == null || cell.getCellTypeEnum() == CellType.BLANK) { ... }

If you are doing machine learning and use tensorflow, many float are of 'float32', not 'float64', and none of the methods mentioned in this thread likely to work. You will have to first convert to float64 first.

x.astype('float')

before round(...).

Run "pwd" command first in cli to find out what is your current project's direction and then add the name of the file to your path!

And another useful command to do this (after git fetch) is:

git log origin/master ^master

This shows the commits that are in origin/master but not in master. You can also do it in opposite when doing git pull, to check what commits will be submitted to remote.

Try this

 <div id="app">
  <p>
    <label for='terms'>
      <input id='terms' type='checkbox' v-model='terms' /> Click me to enable
    </label>
  </p>
  <input :disabled='isDisabled'></input>
</div>

vue js

new Vue({
  el: '#app',
  data: {
    terms: false
  },
  computed: {
    isDisabled: function(){
        return !this.terms;
    }
  }
})

<script type="text/javascript">
    document.write(document.referrer);
</script>

document.referrer serves your purpose, but it doesn't work for Internet Explorer versions earlier than IE9.

It will work for other popular browsers, like Chrome, Mozilla, Opera, Safari etc.

AES.

(I also am assuming you mean twofish not the much older and weaker blowfish)

Both (AES & twofish) are good algorithms. However even if they were equal or twofish was slightly ahead on technical merit I would STILL chose AES.

Why? Publicity. AES is THE standard for government encryption and thus millions of other entities also use it. A talented cryptanalyst simply gets more "bang for the buck" finding a flaw in AES then it does for the much less know and used twofish.

Obscurity provides no protection in encryption. More bodies looking, studying, probing, attacking an algorithm is always better. You want the most "vetted" algorithm possible and right now that is AES. If an algorithm isn't subject to intense and continual scrutiny you should place a lower confidence of it's strength. Sure twofish hasn't been compromised. Is that because of the strength of the cipher or simply because not enough people have taken a close look ..... YET

Spy can be useful when you want to create unit tests for legacy code.

I have created a runable example here https://www.surasint.com/mockito-with-spy/ , I copy some of it here.

If you have something like this code:

public void transfer(  DepositMoneyService depositMoneyService, WithdrawMoneyService withdrawMoneyService, 
             double amount, String fromAccount, String toAccount){
    withdrawMoneyService.withdraw(fromAccount,amount);
    depositMoneyService.deposit(toAccount,amount);
}

You may don't need spy because you can just mock DepositMoneyService and WithdrawMoneyService.

But with some, legacy code, dependency is in the code like this:

    public void transfer(String fromAccount, String toAccount, double amount){

        this.depositeMoneyService = new DepositMoneyService();
        this.withdrawMoneyService = new WithdrawMoneyService();

        withdrawMoneyService.withdraw(fromAccount,amount);
        depositeMoneyService.deposit(toAccount,amount);
    }

Yes, you can change to the first code but then API is changed. If this method is being used by many places, you have to change all of them.

Alternative is that you can extract the dependency out like this:

    public void transfer(String fromAccount, String toAccount, double amount){
        this.depositeMoneyService = proxyDepositMoneyServiceCreator();
        this.withdrawMoneyService = proxyWithdrawMoneyServiceCreator();

        withdrawMoneyService.withdraw(fromAccount,amount);
        depositeMoneyService.deposit(toAccount,amount);
    }
    DepositMoneyService proxyDepositMoneyServiceCreator() {
        return new DepositMoneyService();
    }

    WithdrawMoneyService proxyWithdrawMoneyServiceCreator() {
        return new WithdrawMoneyService();
    }

Then you can use the spy the inject the dependency like this:

DepositMoneyService mockDepositMoneyService = mock(DepositMoneyService.class);
        WithdrawMoneyService mockWithdrawMoneyService = mock(WithdrawMoneyService.class);

    TransferMoneyService target = spy(new TransferMoneyService());

    doReturn(mockDepositMoneyService)
            .when(target).proxyDepositMoneyServiceCreator();

    doReturn(mockWithdrawMoneyService)
            .when(target).proxyWithdrawMoneyServiceCreator();

More detail in the link above.

Since Java 8, it seems like the java.time standard library is the way to go. From Joda time web page:

Note that from Java SE 8 onwards, users are asked to migrate to java.time (JSR-310) - a core part of the JDK which replaces this project.

Back to your question. Were you to use Java 8, I think you want LocalDateTime. Because it contains the date and time-of-the-day, but is unaware of time zone or any reference point in time such as the unix epoch.

1st and important step is connect to your db:

psql -d yourDBName

2 step, grant privileges

GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO userName;

You could use a Bat to Exe converter from here:

http://www.f2ko.de/en/b2e.php

This will convert your batch file to an executable, then you can set the icon for the converted file.

Convert the image to a byte[] and store that in the database.

Add this column to your model:

public byte[] Content { get; set; }

Then convert your image to a byte array and store that like you would any other data:

public byte[] ImageToByteArray(System.Drawing.Image imageIn)
{
    using(var ms = new MemoryStream())
    {
        imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);

        return ms.ToArray();
    }
}

public Image ByteArrayToImage(byte[] byteArrayIn)
{
     using(var ms = new MemoryStream(byteArrayIn))
     {
         var returnImage = Image.FromStream(ms);

         return returnImage;
     }
}

Source: Fastest way to convert Image to Byte array

var image = new ImageEntity()
{
   Content = ImageToByteArray(image)
};

_context.Images.Add(image);
_context.SaveChanges();

When you want to get the image back, get the byte array from the database and use the ByteArrayToImage and do what you wish with the Image

This stops working when the byte[] gets to big. It will work for files under 100Mb

In case you want to use the APK outside the Google Play Store, e.g., private a solution like the following will probably work:

    @Override
    public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
        /*...*/
        handler.proceed();
    }

In case you want to add an additional optional layer of security, you can try to make use of certificate pinning. IMHO this is not necessary for private or internal usage tough.

If you plan to publish the app on the Google Play Store, then you should avoid @Override onReceivedSslError(...){...}. Especially making use of handler.proceed(). Google will find this code snippet and will reject your app for sure since the solution with handler.proceed() will suppress all kinds of built-in security mechanisms.

And just because of the fact that browsers do not complain about your https connection, it does not mean that the SSL certificate itself is trusted at all!

In my case, the SSL certificate chain was broken. You can quickly test such issues with SSL Checker or more intermediate with SSLLabs. But please do not ask me how this can happen. I have absolutely no clue.

Anyway, after reinstalling the SSL certificate, all errors regarding the "untrusted SSL certificate in WebView whatsoever" disappeared finally. I also removed the @Override for onReceivedSslError(...) and got rid of handler.proceed(), and é voila my app was not rejected by Google Play Store (again).

I have found a solution that brings the window to the top, but it behaves as a normal window:

if (!Window.IsVisible)
{
    Window.Show();
}

if (Window.WindowState == WindowState.Minimized)
{
    Window.WindowState = WindowState.Normal;
}

Window.Activate();
Window.Topmost = true;  // important
Window.Topmost = false; // important
Window.Focus();         // important

RENAME SPECIFIC COLUMNS

Use the df.rename() function and refer the columns to be renamed. Not all the columns have to be renamed:

df = df.rename(columns={'oldName1': 'newName1', 'oldName2': 'newName2'})
# Or rename the existing DataFrame (rather than creating a copy) 
df.rename(columns={'oldName1': 'newName1', 'oldName2': 'newName2'}, inplace=True)

Minimal Code Example

df = pd.DataFrame('x', index=range(3), columns=list('abcde'))
df

   a  b  c  d  e
0  x  x  x  x  x
1  x  x  x  x  x
2  x  x  x  x  x

The following methods all work and produce the same output:

df2 = df.rename({'a': 'X', 'b': 'Y'}, axis=1)  # new method
df2 = df.rename({'a': 'X', 'b': 'Y'}, axis='columns')
df2 = df.rename(columns={'a': 'X', 'b': 'Y'})  # old method  

df2

   X  Y  c  d  e
0  x  x  x  x  x
1  x  x  x  x  x
2  x  x  x  x  x

Remember to assign the result back, as the modification is not-inplace. Alternatively, specify inplace=True:

df.rename({'a': 'X', 'b': 'Y'}, axis=1, inplace=True)
df

   X  Y  c  d  e
0  x  x  x  x  x
1  x  x  x  x  x
2  x  x  x  x  x
 

From v0.25, you can also specify errors='raise' to raise errors if an invalid column-to-rename is specified. See v0.25 rename() docs.

REASSIGN COLUMN HEADERS

Use df.set_axis() with axis=1 and inplace=False (to return a copy).

df2 = df.set_axis(['V', 'W', 'X', 'Y', 'Z'], axis=1, inplace=False)
df2

   V  W  X  Y  Z
0  x  x  x  x  x
1  x  x  x  x  x
2  x  x  x  x  x

This returns a copy, but you can modify the DataFrame in-place by setting inplace=True (this is the default behaviour for versions <=0.24 but is likely to change in the future).

You can also assign headers directly:

df.columns = ['V', 'W', 'X', 'Y', 'Z']
df

   V  W  X  Y  Z
0  x  x  x  x  x
1  x  x  x  x  x
2  x  x  x  x  x

Expanding on Dave's answer, you can set the contentMode of the button's imageView all in IB, without any code, using Runtime Attributes:

• 1 means UIViewContentModeScaleAspectFit,
• 2 would mean UIViewContentModeScaleAspectFill.

You can just use the pipe on its own:

"string1|string2"

for example:

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|string2", "blah"));

Output:

blah, blah, string3

The main reason to use parentheses is to limit the scope of the alternatives:

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string(1|2)", "blah"));

has the same output. but if you just do this:

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|2", "blah"));

you get:

blah, stringblah, string3

because you've said "string1" or "2".

If you don't want to capture that part of the expression use ?::

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string(?:1|2)", "blah"));

If the string is Unicode the easiest way is:

import base64                                                        

a = base64.b64encode(bytes(u'complex string: ñáéíóúÑ', "utf-8"))

# a: b'Y29tcGxleCBzdHJpbmc6IMOxw6HDqcOtw7PDusOR'

b = base64.b64decode(a).decode("utf-8", "ignore")                    

print(b)
# b :complex string: ñáéíóúÑ

Evil is a subjective term.

You don't control statics in terms of creation and destruction. They live at the behest of the program loading and unloading.

Since statics live in one space, all threads wishing to use them must go through access control that you have to manage. This means that programs are more coupled and this change is harder to envisage and manage (like J Skeet says). This leads to problems of isolating change impact and thus affects how testing is managed.

These are the two main issues I have with them.

If you are using CMAKE with GNU compiler this global define works fine:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__MY_FILE__='\"$(notdir $(abspath $<))\"'")

Try using setInterval and include jquery library and just try removing unwrap()

<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">

var timeout = setInterval(reloadChat, 5000);    
function reloadChat () {

     $('#links').load('test.php');
}
</script>

UPDATE

you are using a jquery old version so include the latest jquery version

<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>

You are looking for the re.sub function.

import re
s = "Example String"
replaced = re.sub('[ES]', 'a', s)
print replaced 

will print axample atring

As for me it was enough to copy all property fields from the base class to the parent like this:

using System.Reflection;

public static ChildClass Clone(BaseClass b)
{
    ChildClass p = new ChildClass(...);

    // Getting properties of base class

    PropertyInfo[] properties = typeof(BaseClass).GetProperties();

    // Copy all properties to parent class

    foreach (PropertyInfo pi in properties)
    {
        if (pi.CanWrite)
            pi.SetValue(p, pi.GetValue(b, null), null);
    }

    return p;
}

An universal solution for any object can be found here

Below two commands are most useful

mvn clean package -Dmaven.test.skip=true 
mvn clean package -DskipTests

Thanks

Nornally the tag is used for that, with a change in style.

Like <p>This is my text <span class="highlight"> and these words are different</span></p>,

You set the css in the header (or rather, in a separate css file) to make your "highlight" text assume the color you wish.

(e.g.: with

<style type="text/css">
  .highlight {color: orange}

</style>

in the header. Avoid using the tag <font /> for that at all costs. :-)

You just need to name the anonymous property the same on both sides

on new { t1.ProjectID, SecondProperty = true } equals 
   new { t2.ProjectID, SecondProperty = t2.Completed } into j1

Based on the comments of @svick, here is another implementation that might make more sense:

from t1 in Projects
from t2 in Tasks.Where(x => t1.ProjectID == x.ProjectID && x.Completed == true)
                .DefaultIfEmpty()
select new { t1.ProjectName, t2.TaskName }

Block - Element take complete width.All properties height , width, margin , padding work

Inline - element take height and width according to the content. Height , width , margin bottom and margin top do not work .Padding and left and right margin work. Example span and anchor.

Inline block - 1. Element don't take complete width, that is why it has *inline* in its name. All properties including height , width, margin top and margin bottom work on it. Which also work in block level element.That's why it has *block* in its name.

In C if you implement count line it will never fail. Yes you can get one extra line if there is stray "ENTER KEY" generally at the end of the file.

File might look some thing like this:

"hello 1
"Hello 2

"

Code below

#include <stdio.h>
#include <stdlib.h>
#define FILE_NAME "file1.txt"

int main() {

    FILE *fd = NULL;
    int cnt, ch;

    fd = fopen(FILE_NAME,"r");
    if (fd == NULL) {
            perror(FILE_NAME);
            exit(-1);
    }

    while(EOF != (ch = fgetc(fd))) {
    /*
     * int fgetc(FILE *) returns unsigned char cast to int
     * Because it has to return EOF or error also.
     */
            if (ch == '\n')
                    ++cnt;
    }

    printf("cnt line in %s is %d\n", FILE_NAME, cnt);

    fclose(fd);
    return 0;
}

Here's one way in XSLT 2

<?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">   <xsl:template match="@*|node()">     <xsl:copy>       <xsl:apply-templates select="@*|node()"/>     </xsl:copy>   </xsl:template>   <xsl:template match="text()">     <xsl:value-of select="translate(.,'&quot;','''')"/>   </xsl:template> </xsl:stylesheet> 

Doing it in XSLT1 is a little more problematic as it's hard to get a literal containing a single apostrophe, so you have to resort to a variable:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">   <xsl:template match="@*|node()">     <xsl:copy>       <xsl:apply-templates select="@*|node()"/>     </xsl:copy>   </xsl:template>   <xsl:variable name="apos">'</xsl:variable>   <xsl:template match="text()">     <xsl:value-of select="translate(.,'&quot;',$apos)"/>   </xsl:template> </xsl:stylesheet> 

You can add and retrieve a numpy array from dataframe using this:

import numpy as np
import pandas as pd

df = pd.DataFrame({'b':range(10)}) # target dataframe
a = np.random.normal(size=(10,2)) # numpy array
df['a']=a.tolist() # save array
np.array(df['a'].tolist()) # retrieve array

This builds on the previous answer that confused me because of the sparse part and this works well for a non-sparse numpy arrray.

Try echo $'a\nb'.

If you want to store it in a variable and then use it with the newlines intact, you will have to quote your usage correctly:

var=$'a\nb\nc'
echo "$var"

Or, to fix your example program literally:

var="a b c"
for i in $var; do
    p="`echo -e "$p\\n$i"`"
done
echo "$p"

You can't define an object literal with a dynamic key. Do this :

var o = {};
o[key] = value;
return o;

There's no shortcut (edit: there's one now, with ES6, see the other answer).

With jQuery, I've done it this way:

function checkKey(e){
     switch (e.keyCode) {
        case 40:
            alert('down');
            break;
        case 38:
            alert('up');
            break;
        case 37:
            alert('left');
            break;
        case 39:
            alert('right');
            break;
        default:
            alert('???');  
            }      
}

if ($.browser.mozilla) {
    $(document).keypress (checkKey);
} else {
    $(document).keydown (checkKey);
}

Also, try these plugins, which looks like they do all that work for you:

http://www.openjs.com/scripts/events/keyboard_shortcuts

http://www.webappers.com/2008/07/31/bind-a-hot-key-combination-with-jquery-hotkeys/

Kill the previous instance of tomcat or the process that's running on 8080.

Go to terminal and do this:

lsof -i :8080

The output will be something like:

COMMAND   PID   USER      FD   TYPE  DEVICE SIZE/OFF NODE NAME
java    76746   YourName  57u  IPv6 0xd2a83c9c1e75      0t0    TCP *:http-alt (LISTEN)

Kill this process using it's PID:

kill 76746

The other answers do not seem to touch on a key aspect here, and that is you make no mention of requiring supporting a web browser as a client. Most of the limitations of plain HTTP above are assuming you would be working with browser/ JS implementations.

The HTTP protocol is fully capable of full-duplex communication; it is legal to have a client perform a POST with a chunked encoding transfer, and a server to return a response with a chunked-encoding body. This would remove the header overhead to just at init time.

So if all you're looking for is full-duplex, control both client and server, and are not interested in extra framing/features of WebSockets, then I would argue that HTTP is a simpler approach with lower latency/CPU (although the latency would really only differ in microseconds or less for either).

You can do the following :-

$(document).ready(function(){
    $("#id").trigger("click");
});

Assuming two decimal places on your percentages, the data type you use depends on how you plan to store your percentages. If you are going to store their fractional equivalent (e.g. 100.00% stored as 1.0000), I would store the data in a decimal(5,4) data type with a CHECK constraint that ensures that the values never exceed 1.0000 (assuming that is the cap) and never go below 0 (assuming that is the floor). If you are going to store their face value (e.g. 100.00% is stored as 100.00), then you should use decimal(5,2) with an appropriate CHECK constraint. Combined with a good column name, it makes it clear to other developers what the data is and how the data is stored in the column.

The Fiddle

HTML

<div class="container">

    <div class="left-column">

    </div>

    <div class="right-column">
        <h1>Hello Kitty!</h1>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Laudantium cum accusamus ab nostrum sit laborum eligendi, totam nam aperiam harum officia commodi tempora dolorum. Incidunt earum explicabo deleniti architecto illo!</p>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Laudantium cum accusamus ab nostrum sit laborum eligendi, totam nam aperiam harum officia commodi tempora dolorum. Incidunt earum explicabo deleniti architecto illo!</p>
    </div>

</div>

CSS

.container {
    float: left;
    width: 100%;
    background-color: black;
    position: relative;
    left: 0;
}

.container:before,
.container:after {
    content: " ";
    display: table;
}

.container:after {
    clear: both;
}

.left-column {
    float: left;
    width: 30%;
    height: 100%;
    position: absolute;
    background: wheat;
}

.right-column {
    float: right;
    width: 70%;
    position: relative;
    padding: 0;
    margin: 0;
    background: rebeccapurple;            
}

Even though the name is immutable, you may still want to have the option of computing it rather than storing it in a field. (I realize this is unlikely for "name", but let's aim for the general case.) For that reason, even constant fields are best wrapped inside of getters:

class Foo {
    public:
        const std::string& getName() const {return name_;}
    private:
        const std::string& name_;
};

Note that if you were to change getName() to return a computed value, it couldn't return const ref. That's ok, because it won't require any changes to the callers (modulo recompilation.)

    String path = Server.MapPath("~/MP_Upload/");
    if (!Directory.Exists(path))
    {
        Directory.CreateDirectory(path);
    }

Your application has an AppCompat theme

<application
    android:theme="@style/AppTheme">

But, you overwrote the Activity (which extends AppCompatActivity) with a theme that isn't descendant of an AppCompat theme

<activity android:name=".MainActivity"
    android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >

You could define your own fullscreen theme like so (notice AppCompat in the parent=)

<style name="AppFullScreenTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowActionBar">false</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

Then set that on the Activity.

<activity android:name=".MainActivity"
    android:theme="@style/AppFullScreenTheme" >

Note: There might be an AppCompat theme that's already full screen, but don't know immediately

June 2018 update to ES6

    const doc = document.getElementById('test');
    let notes = null;
    for (const value of doc) {
        if (value.className === '4') {
            notes = value;
            break;
        }    
    }

Be careful. For this you need @GET (not @PUT).

As already pointed out in comments by Abhijeet you can just add line like:

/target/**

to exclude file in \.git\info\ folder.

Then if you want to get rid of that target folder in your remote repo you will need to first manually delete this folder from your local repository, commit and then push it. Thats because git will show you content of a target folder as modified at first.

The code snippet you gave does indeed load the entire set of data and then counts it client-side, which can be very slow for large amounts of data.

Firebase doesn't currently have a way to count children without loading data, but we do plan to add it.

For now, one solution would be to maintain a counter of the number of children and update it every time you add a new child. You could use a transaction to count items, like in this code tracking upvodes:

var upvotesRef = new Firebase('https://docs-examples.firebaseio.com/android/saving-data/fireblog/posts/-JRHTHaIs-jNPLXOQivY/upvotes');
upvotesRef.transaction(function (current_value) {
  return (current_value || 0) + 1;
});

For more info, see https://www.firebase.com/docs/transactions.html

UPDATE: Firebase recently released Cloud Functions. With Cloud Functions, you don't need to create your own Server. You can simply write JavaScript functions and upload it to Firebase. Firebase will be responsible for triggering functions whenever an event occurs.

If you want to count upvotes for example, you should create a structure similar to this one:

{
  "posts" : {
    "-JRHTHaIs-jNPLXOQivY" : {
      "upvotes_count":5,
      "upvotes" : {
      "userX" : true,
      "userY" : true,
      "userZ" : true,
      ...
    }
    }
  }
}

And then write a javascript function to increase the upvotes_count when there is a new write to the upvotes node.

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

exports.countlikes = functions.database.ref('/posts/$postid/upvotes').onWrite(event => {
  return event.data.ref.parent.child('upvotes_count').set(event.data.numChildren());
});

You can read the Documentation to know how to Get Started with Cloud Functions.

Also, another example of counting posts is here: https://github.com/firebase/functions-samples/blob/master/child-count/functions/index.js

Update January 2018

The firebase docs have changed so instead of event we now have change and context.

The given example throws an error complaining that event.data is undefined. This pattern seems to work better:

exports.countPrescriptions = functions.database.ref(`/prescriptions`).onWrite((change, context) => {
    const data = change.after.val();
    const count = Object.keys(data).length;
    return change.after.ref.child('_count').set(count);
});

```

1. Open Developer Command prompt.
2. type

where gacutil

A little extension on the answer of jsbueno:

#!/usr/bin/env python

import cairo
import rsvg
from xml.dom import minidom


def convert_svg_to_png(svg_file, output_file):
    # Get the svg files content
    with open(svg_file) as f:
        svg_data = f.read()

    # Get the width / height inside of the SVG
    doc = minidom.parse(svg_file)
    width = int([path.getAttribute('width') for path
                 in doc.getElementsByTagName('svg')][0])
    height = int([path.getAttribute('height') for path
                  in doc.getElementsByTagName('svg')][0])
    doc.unlink()

    # create the png
    img = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
    ctx = cairo.Context(img)
    handler = rsvg.Handle(None, str(svg_data))
    handler.render_cairo(ctx)
    img.write_to_png(output_file)

if __name__ == '__main__':
    from argparse import ArgumentParser

    parser = ArgumentParser()

    parser.add_argument("-f", "--file", dest="svg_file",
                        help="SVG input file", metavar="FILE")
    parser.add_argument("-o", "--output", dest="output", default="svg.png",
                        help="PNG output file", metavar="FILE")
    args = parser.parse_args()

    convert_svg_to_png(args.svg_file, args.output)

This could be done with DOM4 MutationObservers but will only work in Firefox 14+/Chrome 18+ (for now).

However there is an "epic hack" (author's words not mine!) that works in all browsers that support CSS3 animations which are: IE10, Firefox 5+, Chrome 3+, Opera 12, Android 2.0+, Safari 4+. See the demo from the blog. The hack is to use a CSS3 animation event with a given name that is observed and acted upon in JavaScript.

Your should really use the INFORMATION_SCHEMA views in your database:

USE <your_database_name>
GO
SELECT * FROM INFORMATION_SCHEMA.TABLES

You can then filter that by table schema and/or table type, e.g.

SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE'

Table A 
+--------+-----------+
| A-num  | text      | 
|    1   |           |
|    2   |           |
|    3   |           |
|    4   |           |
|    5   |           |
+--------+-----------+

Table B
+------+------+--------------+
| B-num|  date        |  A-num | 
|  22  |  01.08.2003  |     2  |
|  23  |  02.08.2003  |     2  | 
|  24  |  03.08.2003  |     1  |
|  25  |  04.08.2003  |     4  |
|  26  |  05.03.2003  |     4  |

I will update field text in table A with

UPDATE `Table A`,`Table B`
SET `Table A`.`text`=concat_ws('',`Table A`.`text`,`Table B`.`B-num`," from                                           
",`Table B`.`date`,'/')
WHERE `Table A`.`A-num` = `Table B`.`A-num`

and come to this result:

Table A 
+--------+------------------------+
| A-num  | text                   | 
|    1   |  24 from 03 08 2003 /  |
|    2   |  22 from 01 08 2003 /  |       
|    3   |                        |
|    4   |  25 from 04 08 2003 /  |
|    5   |                        |
--------+-------------------------+

where only one field from Table B is accepted, but I will come to this result:

Table A 
+--------+--------------------------------------------+
| A-num  | text                                       | 
|    1   |  24 from 03 08 2003                        |
|    2   |  22 from 01 08 2003 / 23 from 02 08 2003 / |       
|    3   |                                            |
|    4   |  25 from 04 08 2003 / 26 from 05 03 2003 / |
|    5   |                                            |
+--------+--------------------------------------------+

I have met the same problem. My project is running on the local server. I checked my php code.

$db = mysqli_connect('localhost', 'root', 'root', 'smart');

I use localhost to connect to my local database. That maybe the cause of the problem which you're describing. You can modify your HOSTS file. Add the line

127.0.0.1 localhost.

PYTHONPATH is an environment variable whose value is a list of directories. Once set, it is used by Python to search for imported modules, along with other std. and 3rd-party library directories listed in Python's "sys.path".

As any other environment variables, you can either export it in shell or in ~/.bashrc, see here. You can query os.environ['PYTHONPATH'] for its value in Python as shown below:

$ python3 -c "import os, sys; print(os.environ['PYTHONPATH']); print(sys.path) if 'PYTHONPATH' in sorted(os.environ) else print('PYTHONPATH is not defined')"

IF defined in shell as

$ export PYTHONPATH=$HOME/Documents/DjangoTutorial/mysite

THEN result =>

/home/Documents/DjangoTutorial/mysite
['', '/home/Documents/DjangoTutorial/mysite', '/usr/local/lib/python37.zip', '/usr/local/lib/python3.7', '/usr/local/lib/python3.7/lib-dynload', '/usr/local/lib/python3.7/site-packages']

ELSE result =>

PYTHONPATH is not defined

To set PYTHONPATH to multiple paths, see here.

Note that one can add or delete a search path via sys.path.insert(), del or remove() at run-time, but NOT through os.environ[]. Example:

>>> os.environ['PYTHONPATH']="$HOME/Documents/DjangoTutorial/mysite"
>>> 'PYTHONPATH' in sorted(os.environ)
True
>>> sys.path // but Not there
['', '/usr/local/lib/python37.zip', '/usr/local/lib/python3.7', '/usr/local/lib/python3.7/lib-dynload', '/usr/local/lib/python3.7/site-packages']

>>> sys.path.insert(0,os.environ['PYTHONPATH'])
>>> sys.path // It's there
['$HOME/Documents/DjangoTutorial/mysite', '', '/usr/local/lib/python37.zip', '/usr/local/lib/python3.7', '/usr/local/lib/python3.7/lib-dynload', '/usr/local/lib/python3.7/site-packages']
>>> 

In summary, PYTHONPATH is one way of specifying the Python search path(s) for imported modules in sys.path. You can also apply list operations directly to sys.path without the aid of PYTHONPATH.

Use \overset{above}{main} in math mode. In your case, \overset{a}{\#}.

It is not an issue it is because of caching...

To overcome this add a timestamp to your endpoint call, e.g. axios.get('/api/products').

After timestamp it should be axios.get(/api/products?${Date.now()}.

It will resolve your 304 status code.

You can remove double spaces and count the number of " " in the string to get the count of words. Use stringr and rm_white {qdapRegex}

str_count(rm_white(s), " ") +1

The problems were:

1. iframe content comes from another domain
2. iframe dimensions need to be adjusted for each video

The solution based on omerkirk's answer involves:

• Creating an iframe element
• Creating a dialog with autoOpen: false, width: "auto", height: "auto"
• Specifying iframe source, width and height before opening the dialog

Here is a rough outline of code:

HTML

<div class="thumb">
    <a href="http://jsfiddle.net/yBNVr/show/"   data-title="Std 4:3 ratio video" data-width="512" data-height="384"><img src="http://dummyimage.com/120x90/000/f00&text=Std+4-3+ratio+video" /></a></li>
    <a href="http://jsfiddle.net/yBNVr/1/show/" data-title="HD 16:9 ratio video" data-width="512" data-height="288"><img src="http://dummyimage.com/120x90/000/f00&text=HD+16-9+ratio+video" /></a></li>
</div>

jQuery

$(function () {
    var iframe = $('<iframe frameborder="0" marginwidth="0" marginheight="0" allowfullscreen></iframe>');
    var dialog = $("<div></div>").append(iframe).appendTo("body").dialog({
        autoOpen: false,
        modal: true,
        resizable: false,
        width: "auto",
        height: "auto",
        close: function () {
            iframe.attr("src", "");
        }
    });
    $(".thumb a").on("click", function (e) {
        e.preventDefault();
        var src = $(this).attr("href");
        var title = $(this).attr("data-title");
        var width = $(this).attr("data-width");
        var height = $(this).attr("data-height");
        iframe.attr({
            width: +width,
            height: +height,
            src: src
        });
        dialog.dialog("option", "title", title).dialog("open");
    });
});

Demo here and code here. And another example along similar lines

Late to the party, but if you don't want to expose environment variables, I guess it's easier to do something like this:

RUN echo 1 > /tmp/__var_1
RUN echo `cat /tmp/__var_1`
RUN rm -f /tmp/__var_1

I ended up doing it because we host private npm packages in aws codeartifact:

RUN aws codeartifact get-authorization-token --output text > /tmp/codeartifact.token
RUN npm config set //company-123456.d.codeartifact.us-east-2.amazonaws.com/npm/internal/:_authToken=`cat /tmp/codeartifact.token`
RUN rm -f /tmp/codeartifact.token

And here ARG cannot work and i don't want to use ENV because i don't want to expose this token to anything else

You don't need HttpClient, you don't even need Angular. All you need is WebPack and JSON-Loader, both are already part of Angular-CLI.

All the code you need is this line:

import * as someName from './somePath/someFile.json;

And the your json-data can be found under someName.default. However this code will throw a type-error from the TypeScript compiler - this isn't a real error, but only a type-error.

To solve it add this code to your src/typings.d.ts file (if it doesn't exist create it):

declare module "*.json"
{
  const value: any;
  export default value;
}

Please notice: that working in this method will compile your json (minify/uglify) into the app bundle at build time. This mean that you won't need to wait until this file will load - as you will if you choice to work with httpClient.get(...) - meaning faster application!

I agree with tnguyen80's response. Please note that when there is a specific string value in query better to given entire query in double quotes.

For example:

$hive -e "select * from table where city = 'London' and id >=100" > /home/user/outputdirectory/city details.csv

a better aproach:

class Animal
{
    private $_name = null;

    public function __construct($name = null)
    {
        $this->_name = $name;
    }

    /**
     * casts object
     * @param Animal $to
     * @return Animal
     */
    public function cast($to)
    {
        if ($to instanceof Animal) {
            $to->_name = $this->_name;
        } else {
            throw(new Exception('cant cast ' . get_class($this) . ' to ' . get_class($to)));
        return $to;
    }

    public function getName()
    {
        return $this->_name;
    }
}

class Cat extends Animal
{
    private $_preferedKindOfFish = null;

    public function __construct($name = null, $preferedKindOfFish = null)
    {
        parent::__construct($name);
        $this->_preferedKindOfFish = $preferedKindOfFish;
    }

    /**
     * casts object
     * @param Animal $to
     * @return Animal
     */
    public function cast($to)
    {
        parent::cast($to);
        if ($to instanceof Cat) {
            $to->_preferedKindOfFish = $this->_preferedKindOfFish;
        }
        return $to;
    }

    public function getPreferedKindOfFish()
    {
        return $this->_preferedKindOfFish;
    }
}

class Dog extends Animal
{
    private $_preferedKindOfCat = null;

    public function __construct($name = null, $preferedKindOfCat = null)
    {
        parent::__construct($name);
        $this->_preferedKindOfCat = $preferedKindOfCat;
    }

    /**
     * casts object
     * @param Animal $to
     * @return Animal
     */
    public function cast($to)
    {
        parent::cast($to);
        if ($to instanceof Dog) {
            $to->_preferedKindOfCat = $this->_preferedKindOfCat;
        }
        return $to;
    }

    public function getPreferedKindOfCat()
    {
        return $this->_preferedKindOfCat;
    }
}

$dogs = array(
    new Dog('snoopy', 'vegetarian'),
    new Dog('coyote', 'any'),
);

foreach ($dogs as $dog) {
    $cat = $dog->cast(new Cat());
    echo get_class($cat) . ' - ' . $cat->getName() . "\n";
}

iOs 10+ allow video autoplay inline. but you have to turn off "Low power mode" on your iPhone.

As to me, my json file is very large, when use common json in python it gets the above error.

After install simplejson by sudo pip install simplejson.

And then I solved it.

import json
import simplejson


def test_parse_json():
    f_path = '/home/hello/_data.json'
    with open(f_path) as f:
        # j_data = json.load(f)      # ValueError: No JSON object could be decoded
        j_data = simplejson.load(f)  # right
    lst_img = j_data['images']['image']
    print lst_img[0]


if __name__ == '__main__':
    test_parse_json()

You can do:

$ pip install "package>=0.2,<0.3"

And pip will look for the best match, assuming the version is at least 0.2, and less than 0.3.

This also applies to pip requirements files. See the full details on version specifiers in PEP 440.

There could be many, mainly IDEs dictate some trends and C++ conventions are also pushing. For C commonly:

• UNDERSCORED_UPPER_CASE (macro definitions, constants, enum members)
• underscored_lower_case (variables, functions)
• CamelCase (custom types: structs, enums, unions)
• uncappedCamelCase (oppa Java style)
• UnderScored_CamelCase (variables, functions under kind of namespaces)

Hungarian notation for globals are fine but not for types. And even for trivial names, please use at least two characters.

EDIT: You say "I am concatenating simple and short XML file and I do not use serialization, so I need to explicitly escape XML character by hand".

I would strongly advise you not to do it by hand. Use the XML APIs to do it all for you - read in the original files, merge the two into a single document however you need to (you probably want to use XmlDocument.ImportNode), and then write it out again. You don't want to write your own XML parsers/formatters. Serialization is somewhat irrelevant here.

If you can give us a short but complete example of exactly what you're trying to do, we can probably help you to avoid having to worry about escaping in the first place.

Original answer

It's not entirely clear what you mean, but normally XML APIs do this for you. You set the text in a node, and it will automatically escape anything it needs to. For example:

LINQ to XML example:

using System;
using System.Xml.Linq;

class Test
{
    static void Main()
    {
        XElement element = new XElement("tag",
                                        "Brackets & stuff <>");

        Console.WriteLine(element);
    }
}

DOM example:

using System;
using System.Xml;

class Test
{
    static void Main()
    {
        XmlDocument doc = new XmlDocument();
        XmlElement element = doc.CreateElement("tag");
        element.InnerText = "Brackets & stuff <>";
        Console.WriteLine(element.OuterXml);
    }
}

Output from both examples:

<tag>Brackets &amp; stuff &lt;&gt;</tag>

That's assuming you want XML escaping, of course. If you're not, please post more details.

I had this problem and just decided to rename one of the programs from python.exe to python2.7.exe. Now I can specify on command prompt which program to run easily without introducing any scripts or changing environmental paths. So i have two programs: python2.7 and python (the latter which is v.3.8 aka default).

Because QuerySets implement the Python __or__ operator (|), or union, it just works. As you'd expect, the | binary operator returns a QuerySet so order_by(), .distinct(), and other queryset filters can be tacked on to the end.

combined_queryset = User.objects.filter(income__gte=5000) | User.objects.filter(income__isnull=True)
ordered_queryset = combined_queryset.order_by('-income')

Update 2019-06-20: This is now fully documented in the Django 2.1 QuerySet API reference. More historic discussion can be found in DjangoProject ticket #21333.

import datetime
now = datetime.datetime.now()
print now.strftime("%b %_d")

To see both the normal distribution and your actual data you should plot your data as a histogram, then draw the probability density function over this. See the example on https://docs.scipy.org/doc/numpy-1.15.0/reference/generated/numpy.random.normal.html for exactly how to do this.

I hate to add the same function to every UIViewController. By extending UIViewController to support UITextFieldDelegate, you can provide a default behavior of "return pressed".

extension UIViewController: UITextFieldDelegate{
    public func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true;
    }
}

When you create new UIViewController and UITextField, all you have to do is to write one line code in your UIViewController.

override func viewDidLoad() {
    super.viewDidLoad()
    textField.delegate = self
}

You can even omit this one line code by hooking delegate in Main.storyboard. (Using "ctrl" and drag from UITextField to UIViewController)

A similar approach to https://stackoverflow.com/a/15385080/337172 but hopefully more understandable and easy to tweak:

diff \
  --new-line-format="%L" \
  --old-line-format="" \
  --unchanged-line-format="" \
  A1 A2

I know this is an old question, but just in case you are trying to do the same thing in ASP.NET Core, here is how you can create the UrlHelper inside an action:

var urlHelper = new UrlHelper(this.ControllerContext);

Or, you could just use the Controller.Url property if you inherit from Controller.

We can read properties file in spring boot using 3 way

1. Read value from application.properties Using @Value

map key as

public class EmailService {

 @Value("${email.username}")
 private String username;

}

2. Read value from application.properties Using @ConfigurationProperties

In this we will map prefix of key using ConfigurationProperties and key name is same as field of class

  @Component
   @ConfigurationProperties("email")
    public class EmailConfig {

        private String   username;
    }

3. Read application.properties Using using Environment object

public class EmailController {

@Autowired
private Environment env;

@GetMapping("/sendmail")
public void sendMail(){     
    System.out.println("reading value from application properties file  using Environment ");
    System.out.println("username ="+ env.getProperty("email.username"));
    System.out.println("pwd ="+ env.getProperty("email.pwd"));
}

Reference : how to read value from application.properties in spring boot

Dictionary<,> is the equivalent. While it doesn't have a Get(...) method, it does have an indexed property called Item which you can access in C# directly using index notation:

class Test {
  Dictionary<int,String> entities;

  public String getEntity(int code) {
    return this.entities[code];
  }
}

If you want to use a custom key type then you should consider implementing IEquatable<> and overriding Equals(object) and GetHashCode() unless the default (reference or struct) equality is sufficient for determining equality of keys. You should also make your key type immutable to prevent weird things happening if a key is mutated after it has been inserted into a dictionary (e.g. because the mutation caused its hash code to change).

Use:

  public void onClick(View v) {

    switch(v.getId()){

      case R.id.Button_MyCards: /** Start a new Activity MyCards.java */
        Intent intent = new Intent(this, MyCards.class);
        this.startActivity(intent);
        break;

      case R.id.Button_Exit: /** AlerDialog when click on Exit */
        MyAlertDialog();
        break;
    }
}

Note that this will not work in Android library projects (due to http://tools.android.com/tips/non-constant-fields) where you will need to use something like:

int id = view.getId();
if (id == R.id.Button_MyCards) {
    action1();
} else if (id == R.id.Button_Exit) {
    action2();
}

It is already a list

type(my_set)
>>> <type 'list'>

Do you want something like

my_set = set([1,2,3,4])
my_list = list(my_set)
print my_list
>> [1, 2, 3, 4]

EDIT : Output of your last comment

>>> my_list = [1,2,3,4]
>>> my_set = set(my_list)
>>> my_new_list = list(my_set)
>>> print my_new_list
[1, 2, 3, 4]

I'm wondering if you did something like this :

>>> set=set()
>>> set([1,2])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'set' object is not callable

The Splatting Operator

To create an array, we create a variable and assign the array. Arrays are noted by the "@" symbol. Let's take the discussion above and use an array to connect to multiple remote computers:

$strComputers = @("Server1", "Server2", "Server3")<enter>

They are used for arrays and hashes.

PowerShell Tutorial 7: Accumulate, Recall, and Modify Data

Array Literals In PowerShell

Very primitive solution to the problem:

void (^nextOperationAfterLongOperationBlock)(void) = ^{

};

[object runSomeLongOperationAndDo:^{
    STAssert…
    nextOperationAfterLongOperationBlock();
}];

Resolved the problem using Jackson library. Prints are called out of Main class and all POJO classes are created. Here is the code snippets.

MainClass.java

public class MainClass {
  public static void main(String[] args) throws JsonParseException, 
       JsonMappingException, IOException {

String jsonStr = "{\r\n" + "    \"id\": 2,\r\n" + " \"socket\": \"0c317829-69bf- 
             43d6-b598-7c0c550635bb\",\r\n"
            + " \"type\": \"getDashboard\",\r\n" + "    \"data\": {\r\n"
            + "     \"workstationUuid\": \"ddec1caa-a97f-4922-833f- 
            632da07ffc11\"\r\n" + " },\r\n"
            + " \"reply\": true\r\n" + "}";

    ObjectMapper mapper = new ObjectMapper();

    MyPojo details = mapper.readValue(jsonStr, MyPojo.class);

    System.out.println("Value for getFirstName is: " + details.getId());
    System.out.println("Value for getLastName  is: " + details.getSocket());
    System.out.println("Value for getChildren is: " + 
      details.getData().getWorkstationUuid());
    System.out.println("Value for getChildren is: " + details.getReply());

}

MyPojo.java

public class MyPojo {
    private String id;

    private Data data;

    private String reply;

    private String socket;

    private String type;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public Data getData() {
        return data;
    }

    public void setData(Data data) {
        this.data = data;
    }

    public String getReply() {
        return reply;
    }

    public void setReply(String reply) {
        this.reply = reply;
    }

    public String getSocket() {
        return socket;
    }

    public void setSocket(String socket) {
        this.socket = socket;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    } 
}

Data.java

public class Data {
    private String workstationUuid;

    public String getWorkstationUuid() {
        return workstationUuid;
    }

    public void setWorkstationUuid(String workstationUuid) {
        this.workstationUuid = workstationUuid;
    }   
}

RESULTS:

Value for getFirstName is: 2
Value for getLastName  is: 0c317829-69bf-43d6-b598-7c0c550635bb
Value for getChildren is: ddec1caa-a97f-4922-833f-632da07ffc11
Value for getChildren is: true

The better way:

function(
  a, b               // Placeholders
){
  for(               // Loop :)
      b = a = '';    // b - result , a - numeric variable
      a++ < 36;      //
      b += a*51&52   // If "a" is not 9 or 14 or 19 or 24
                  ?  //  return a random number or 4
           (
               a^15              // If "a" is not 15,
                  ?              // generate a random number from 0 to 15
               8^Math.random() *
               (a^20 ? 16 : 4)   // unless "a" is 20, in which case a random number from 8 to 11,
                  :
               4                 //  otherwise 4
           ).toString(16)
                  :
         '-'                     //  In other cases, (if "a" is 9,14,19,24) insert "-"
      );
  return b
 }

Minimized:

function(a,b){for(b=a='';a++<36;b+=a*51&52?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-');return b}

The only way to add headers to a request from inside a browser is use the XmlHttpRequest setRequestHeader method.

Using this with "GET" request will download the resource. The trick then is to access the resource in the intended way. Ostensibly you should be able to allow the GET response to be cacheable for a short period, hence navigation to a new URL or the creation of an IMG tag with a src url should use the cached response from the previous "GET". However that is quite likely to fail especially in IE which can be a bit of a law unto itself where the cache is concerned.

Ultimately I agree with Mehrdad, use of query string is easiest and most reliable method.

Another quirky alternative is use an XHR to make a request to a URL that indicates your intent to access a resource. It could respond with a session cookie which will be carried by the subsequent request for the image or link.

Use this way instead of your way.

    addslashes(trim($_POST['username']));