This homebrew function have precision down to a 10th of a second or less.
function sleep (a)
local sec = tonumber(os.clock() + a);
while (os.clock() < sec) do
end
end
Try and check of your ServletResponse response
is an instanceof HttpServletResponse
like so:
if (response instanceof HttpServletResponse) {
response.sendRedirect(....);
}
Here is a code example to follow. #thumbnail is a DIV parent of the #handle DIV
buildDraggable = function() {
$( "#handle" ).draggable({
containment: '#thumbnail',
drag: function(event) {
var top = $(this).position().top;
var left = $(this).position().left;
ICZoom.panImage(top, left);
},
});
System.setProperty is not working for applets. Because JVM already running before applet start. In this case we use applet parameters like this:
deployJava.runApplet({
id: 'MyApplet',
code: 'com.mkysoft.myapplet.SomeClass',
archive: 'com.mkysoft.myapplet.jar'
}, {
java_version: "1.6*", // Target version
cache_option: "no",
cache_archive: "",
codebase_lookup: true,
java_arguments: "-Djava.net.preferIPv4Stack=true"
},
"1.6" // Minimum version
);
You can find deployJava.js at https://www.java.com/js/deployJava.js
If you don't have any other indexes or sorted information for your objects, then you will have to iterate until such an object is found:
next(obj for obj in objs if obj.val == 5)
This is however faster than a complete list comprehension. Compare these two:
[i for i in xrange(100000) if i == 1000][0]
next(i for i in xrange(100000) if i == 1000)
The first one needs 5.75ms, the second one 58.3µs (100 times faster because the loop 100 times shorter).
You should either create a FOREIGN KEY
with ON DELETE CASCADE
:
ALTER TABLE usersmessages
ADD CONSTRAINT fk_usermessages_messageid
FOREIGN KEY (messageid)
REFERENCES messages (messageid)
ON DELETE CASCADE
, or do it using two queries in a transaction:
START TRANSACTION;;
DELETE
FROM usermessages
WHERE messageid = 1
DELETE
FROM messages
WHERE messageid = 1;
COMMIT;
Transaction affects only InnoDB
tables, though.
Let's have a simple one-character string 'š'
and encode it into a sequence of bytes:
>>> 'š'.encode('utf-8')
b'\xc5\xa1'
For the purpose of this example let's display the sequence of bytes in its binary form:
>>> bin(int(b'\xc5\xa1'.hex(), 16))
'0b1100010110100001'
Now it is generally not possible to decode the information back without knowing how it was encoded. Only if you know that the utf-8
text encoding was used, you can follow the algorithm for decoding utf-8 and acquire the original string:
11000101 10100001
^^^^^ ^^^^^^
00101 100001
You can display the binary number 101100001
back as a string:
>>> chr(int('101100001', 2))
'š'
$cd C:\
>
(Press enter when you see this line)
You are now in the C drive.
jQuery:
var timeout = null;_x000D_
$('#input').keyup(function() {_x000D_
clearTimeout(timeout);_x000D_
timeout = setTimeout(() => {_x000D_
console.log($(this).val());_x000D_
}, 1000);_x000D_
});
_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>_x000D_
<input type="text" id="input" placeholder="Type here..."/>
_x000D_
Pure Javascript:
let input = document.getElementById('input');_x000D_
let timeout = null;_x000D_
_x000D_
input.addEventListener('keyup', function (e) {_x000D_
clearTimeout(timeout);_x000D_
timeout = setTimeout(function () {_x000D_
console.log('Value:', input.value);_x000D_
}, 1000);_x000D_
});
_x000D_
<input type="text" id="input" placeholder="Type here..."/>
_x000D_
this way worked for me
ng-disabled="(user.Role.ID != 1) && (user.Role.ID != 2)"
Define the variables at the beginning of the function so if there are no records, the variables exist and you won't get the error. Check for null values in the returned array.
$hn = null;
$pid = null;
$datereg = null;
$prefix = null;
$fname = null;
$lname = null;
$age = null;
$sex = null;
There is no built-in functionality in VBS for that, however, you can use the FileSystemObject FileExists function for that :
Option Explicit
DIM fso
Set fso = CreateObject("Scripting.FileSystemObject")
If (fso.FileExists("C:\Program Files\conf")) Then
WScript.Echo("File exists!")
WScript.Quit()
Else
WScript.Echo("File does not exist!")
End If
WScript.Quit()
use docker inspect container_id
find folder under MergedDir
# example.
"MergedDir": "/var/lib/docker/overlay2/f40cc2ea8912ec3b32deeef5a1542a132f6e918acb/merged
You have to initialise the object (create the object itself) in order to be able to call its methods otherwise you would get a NullPointerException
.
WordList words = new WordList();
I think a better way to close a DialogFragment
is this:
Fragment prev = getSupportFragmentManager().findFragmentByTag("fragment_dialog");
if (prev != null) {
DialogFragment df = (DialogFragment) prev;
df.dismiss();
}
This way you dont have to hold a reference to the DialogFragment
and can close it from everywhere.
To set the PATH
variable, within the Makefile only, use something like:
PATH := $(PATH):/my/dir
test:
@echo my new PATH = $(PATH)
You just need to override the method for back button. You can leave the method empty if you want so that nothing will happen when you press back button. Please have a look at the code below:
@Override
public void onBackPressed()
{
// Your Code Here. Leave empty if you want nothing to happen on back press.
}
I just searched a text with following command which listed me all the file names containing my specified 'search text'.
C:\Users\ak47\Desktop\trunk>findstr /S /I /M /C:"search text" *.*
I had the exact same problem in a project. The issue is that even though the fetch size might be small enough, the JDBCTemplate reads all the result of your query and maps it out in a huge list which might blow your memory. I ended up extending NamedParameterJdbcTemplate to create a function which returns a Stream of Object. That Stream is based on the ResultSet normally returned by JDBC but will pull data from the ResultSet only as the Stream requires it. This will work if you don't keep a reference of all the Object this Stream spits. I did inspire myself a lot on the implementation of org.springframework.jdbc.core.JdbcTemplate#execute(org.springframework.jdbc.core.ConnectionCallback). The only real difference has to do with what to do with the ResultSet. I ended up writing this function to wrap up the ResultSet:
private <T> Stream<T> wrapIntoStream(ResultSet rs, RowMapper<T> mapper) {
CustomSpliterator<T> spliterator = new CustomSpliterator<T>(rs, mapper, Long.MAX_VALUE, NON-NULL | IMMUTABLE | ORDERED);
Stream<T> stream = StreamSupport.stream(spliterator, false);
return stream;
}
private static class CustomSpliterator<T> extends Spliterators.AbstractSpliterator<T> {
// won't put code for constructor or properties here
// the idea is to pull for the ResultSet and set into the Stream
@Override
public boolean tryAdvance(Consumer<? super T> action) {
try {
// you can add some logic to close the stream/Resultset automatically
if(rs.next()) {
T mapped = mapper.mapRow(rs, rowNumber++);
action.accept(mapped);
return true;
} else {
return false;
}
} catch (SQLException) {
// do something with this Exception
}
}
}
you can add some logic to make that Stream "auto closable", otherwise don't forget to close it when you are done.
By default the underlying type of each element in the enum is integer.
enum Values
{
A,
B,
C
}
You can also specify custom value for each item:
enum Values
{
A = 10,
B = 11,
C = 12
}
int x = (int)Values.A; // x will be 10;
Note: By default, the first enumerator has the value 0.
When I trying to my login (which is a bootstrap modal), I used the @sessionattributes annotation. But problem was when the view is a redirect ("redirect:/home"), values I entered to session shows in the url. Some Internet sources suggest to follow http://docs.spring.io/spring/docs/4.3.x/spring-framework-reference/htmlsingle/#mvc-redirecting But I used the HttpSession instead. This session will be there until you close the browsers. Here is sample code
@RequestMapping(value = "/login")
@ResponseBody
public BooleanResponse login(HttpSession session,HttpServletRequest request){
//HttpServletRequest used to take data to the controller
String username = request.getParameter("username");
String password = request.getParameter("password");
//Here you set your values to the session
session.setAttribute("username", username);
session.setAttribute("email", email);
//your code goes here
}
You don't change specific thing on view side.
<c:out value="${username}"></c:out>
<c:out value="${email}"></c:out>
After login add above codes to anyplace in you web site. If session correctly set, you will see the values there. Make sure you correctly added the jstl tags and El- expressions (Here is link to set jstl tags https://menukablog.wordpress.com/2016/05/10/add-jstl-tab-library-to-you-project-correctly/)
I would suggest not to use seaborn pointplot
for plotting. This makes things unnecessarily complicated.
Instead use matplotlib plot_date
. This allows to set labels to the plots and have them automatically put into a legend with ax.legend()
.
import matplotlib.pyplot as plt
import pandas as pd
import seaborn as sns
import numpy as np
date = pd.date_range("2017-03", freq="M", periods=15)
count = np.random.rand(15,4)
df1 = pd.DataFrame({"date":date, "count" : count[:,0]})
df2 = pd.DataFrame({"date":date, "count" : count[:,1]+0.7})
df3 = pd.DataFrame({"date":date, "count" : count[:,2]+2})
f, ax = plt.subplots(1, 1)
x_col='date'
y_col = 'count'
ax.plot_date(df1.date, df1["count"], color="blue", label="A", linestyle="-")
ax.plot_date(df2.date, df2["count"], color="red", label="B", linestyle="-")
ax.plot_date(df3.date, df3["count"], color="green", label="C", linestyle="-")
ax.legend()
plt.gcf().autofmt_xdate()
plt.show()
sns.pointplot(ax=ax,x=x_col,y=y_col,data=df1,color='blue')
sns.pointplot(ax=ax,x=x_col,y=y_col,data=df2,color='green')
sns.pointplot(ax=ax,x=x_col,y=y_col,data=df3,color='red')
ax.legend(handles=ax.lines[::len(df1)+1], labels=["A","B","C"])
ax.set_xticklabels([t.get_text().split("T")[0] for t in ax.get_xticklabels()])
plt.gcf().autofmt_xdate()
plt.show()
As A.B.Cada pointed out, you can query the database itself with sqlplus for the db version. That is the easiest way to findout what is the version of the db that is actively running. If there is more than one you will have to set the oracle_sid appropriately and run the query against each instance.
You can view /etc/oratab file to see what instance and what db home is used per instance. Its possible to have multiple version of oracle installed per server as well as multiple instances. The /etc/oratab file will list all instances and db home. From with the oracle db home you can run "opatch lsinventory" to find out what exaction version of the db is installed as well as any patches applied to that db installation.
See this table.
A 101x101 QR code, with high level error correction, can hold 3248 bits, or 406 bytes. Probably not enough for any meaningful SVG/XML data.
A 177x177 grid, depending on desired level of error correction, can store between 1273 and 2953 bytes. Maybe enough to store something small.
Syntax of waitpid()
:
pid_t waitpid(pid_t pid, int *status, int options);
The value of pid
can be:
pid
.pid
.The value of options is an OR of zero or more of the following constants:
WNOHANG
: Return immediately if no child has exited.WUNTRACED
: Also return if a child has stopped. Status for traced children which have stopped is provided even if this option is not specified.WCONTINUED
: Also return if a stopped child has been resumed by delivery of SIGCONT
.For more help, use man waitpid
.
For portability, you really should do something like this:
public static final String NEW_LINE = System.getProperty("line.separator")
.
.
.
word.contains(NEW_LINE);
unless you're absolutely certain that "\n"
is what you want.
I hate to admit how little I've done an iPhone app for, but I can tell you I won't be doing that again. The guy who said that "simple, one function apps can be done .. [by solo developers]... for $5K" is correct; however, that is still lowball, and presumes almost no project design, graphic design or network backend work.
What you are looking for is:
CardView card = ...
card.setCardBackgroundColor(color);
In XML
card_view:cardBackgroundColor="@android:color/white"
Update: in XML
app:cardBackgroundColor="@android:color/white"
It's hacky but if you're using GFM or some other MD syntax which supports building tables with pipes you can use the column alignment features:
|| <!-- empty table header -->
|:--:| <!-- table header/body separator with center formatting -->
| I'm centered! | <!-- cell gets column's alignment -->
This works in marked.
make copy of your original list, iterate over it, see the modified code below
for a in myarr[:]:
if somecond(a):
myarr.append(newObj())
This is how I solved this problem
$scope.downloadPDF = function () {
var link = document.createElement("a");
link.setAttribute("href", "path_to_pdf_file/pdf_filename.pdf");
link.setAttribute("download", "download_name.pdf");
document.body.appendChild(link); // Required for FF
link.click(); // This will download the data file named "download_name.pdf"
}
Using the new nested query syntax
with q(name, id, parent_id, parent_name) as (
select
t1.name, t1.id,
null as parent_id, null as parent_name
from t1
where t1.id = 1
union all
select
t1.name, t1.id,
q.id as parent_id, q.name as parent_name
from t1, q
where t1.parent_id = q.id
)
select * from q
For Objective-C to set Font and Color
- (void)_setup {
NSDictionary *barButtonTitleAttributes = @{
NSForegroundColorAttributeName : [UIColor whiteColor],
NSFontAttributeName :[UIFont fontWithName:@"Lato-Regular" size:15.0]
};
[self.navigationBar setTitleTextAttributes:barButtonTitleAttributes];
}
You should be able to use the @()
expression syntax:
<a class="@(User.Identity.IsAuthenticated ? "auth" : "anon")">My link here</a>
The problem in the jsfiddle is that your dummy text is all one word. If you use your lorem ipsum given in the question, then the text wraps fine.
If you want large words to be broken mid-word and wrap around, add this to your .title css:
word-wrap: break-word;
While it's simplest to think of a container as a running image, this isn't quite accurate.
An image is really a template that can be turned into a container. To turn an image into a container, the Docker engine takes the image, adds a read-write filesystem on top and initialises various settings including network ports, container name, ID and resource limits. A running container has a currently executing process, but a container can also be stopped (or exited in Docker's terminology). An exited container is not the same as an image, as it can be restarted and will retain its settings and any filesystem changes.
Use read -p
:
# fullname="USER INPUT"
read -p "Enter fullname: " fullname
# user="USER INPUT"
read -p "Enter user: " user
If you like to confirm:
read -p "Continue? (Y/N): " confirm && [[ $confirm == [yY] || $confirm == [yY][eE][sS] ]] || exit 1
You should also quote your variables to prevent pathname expansion and word splitting with spaces:
# passwd "$user"
# mkdir "$home"
# chown "$user:$group" "$home"
Search for [ ]{2,}
. This will find two or more adjacent spaces anywhere within the line. It will also match leading and trailing spaces as well as lines that consist entirely of spaces. If you don't want that, check out Alexander's answer.
Actually, you can leave out the brackets, they are just for clarity (otherwise the space character that is being repeated isn't that well visible :)).
The problem with \s{2,}
is that it will also match newlines on Windows files (where newlines are denoted by CRLF
or \r\n
which is matched by \s{2}
.
If you also want to find multiple tabs and spaces, use [ \t]{2,}
.
Toolbar -> Settings -> Compiler
Selected compiler
drop-down menu, make sure GNU GCC Compiler
is selectedcompiler settings
tab and then the compiler flags
tab underneathHave g++ follow the C++11 ISO C++ language standard [-std=c++11]
" is checkedOK
to saveSessions are stored on the server and are set from server side code, not client side code such as JavaScript.
What you want is a cookie, someone's given a brilliant explanation in this Stack Overflow question here: How do I set/unset cookie with jQuery?
You could potentially use sessions and set/retrieve them with jQuery and AJAX, but it's complete overkill if Cookies will do the trick.
For anyone else who came here looking to do the same with docker-compose
you just need to prepend bash -c
and enclose multiple commands in quotes, joined together with &&
.
So in the OPs example docker-compose run image bash -c "cd /path/to/somewhere && python a.py"
We faced similar issue recently, In case if a process refers to a deleted file, the Inode shall not be released, so you need to check lsof /, and kill/ restart the process will release the inodes.
Correct me if am wrong here.
The permanent space is where the classes, methods, internalized strings, and similar objects used by the VM are stored and never deallocated (hence the name).
This Oracle article succinctly presents the working and parameterization of the HotSpot GC and advises you to augment this space if you load many classes (this is typically the case for application servers and some IDE like Eclipse) :
The permanent generation does not have a noticeable impact on garbage collector performance for most applications. However, some applications dynamically generate and load many classes; for example, some implementations of JavaServer Pages (JSP) pages. These applications may need a larger permanent generation to hold the additional classes. If so, the maximum permanent generation size can be increased with the command-line option -XX:MaxPermSize=.
Note that this other Oracle documentation lists the other HotSpot arguments.
Update : Starting with Java 8, both the permgen space and this setting are gone. The memory model used for loaded classes and methods is different and isn't limited (with default settings). You should not see this error any more.
SELECT *
FROM (
SELECT *
FROM mytable
ORDER BY
dbms_random.value
)
WHERE rownum <= 1000
You've probably miss-typed something above that bit of code or created your own class called IPAddress. If you're using the .net one, that function should be available.
Have you tried using System.Net.IPAddress just in case?
System.Net.IPAddress ipaddress = System.Net.IPAddress.Parse("127.0.0.1"); //127.0.0.1 as an example
The docs on Microsoft's site have a complete example which works fine on my machine.
Existing answers did a great job at explaining the what of this reverse()
function in Django.
However, I'd hoped that my answer shed a different light at the why: why use reverse()
in place of other more straightforward, arguably more pythonic approaches in template-view binding, and what are some legitimate reasons for the popularity of this "redirect via reverse()
pattern" in Django routing logic.
One key benefit is the reverse construction of a url, as others have mentioned. Just like how you would use {% url "profile" profile.id %}
to generate the url from your app's url configuration file: e.g. path('<int:profile.id>/profile', views.profile, name="profile")
.
But as the OP have noted, the use of reverse()
is also commonly combined with the use of HttpResponseRedirect
. But why?
I am not quite sure what this is but it is used together with HttpResponseRedirect. How and when is this reverse() supposed to be used?
Consider the following views.py
:
from django.http import HttpResponseRedirect
from django.urls import reverse
def vote(request, question_id):
question = get_object_or_404(Question, pk=question_id)
try:
selected = question.choice_set.get(pk=request.POST['choice'])
except KeyError:
# handle exception
pass
else:
selected.votes += 1
selected.save()
return HttpResponseRedirect(reverse('polls:polls-results',
args=(question.id)
))
And our minimal urls.py
:
from django.urls import path
from . import views
app_name = 'polls'
urlpatterns = [
path('<int:question_id>/results/', views.results, name='polls-results'),
path('<int:question_id>/vote/', views.vote, name='polls-vote')
]
In the vote()
function, the code in our else
block uses reverse
along with HttpResponseRedirect
in the following pattern:
HttpResponseRedirect(reverse('polls:polls-results',
args=(question.id)
This first and foremost, means we don't have to hardcode the URL (consistent with the DRY principle) but more crucially, reverse()
provides an elegant way to construct URL strings by handling values unpacked from the arguments (args=(question.id)
is handled by URLConfig). Supposed question
has an attribute id
which contains the value 5
, the URL constructed from the reverse()
would then be:
'/polls/5/results/'
In normal template-view binding code, we use HttpResponse()
or render()
as they typically involve less abstraction: one view function returning one template:
def index(request):
return render(request, 'polls/index.html')
But in many legitimate cases of redirection, we typically care about constructing the URL from a list of parameters. These include cases such as:
POST
requestMost of these involve some form of redirection, and a URL constructed through a set of parameters. Hope this adds to the already helpful thread of answers!
You don't need to change hosts file or any Virtual Box configuration. Keep settings in NAT. Go to your Windows instance and run "cmd" or open cmd.exe. Execute command "ipconfig" and get the Default Gateway IP Address. Browse http://10.0.2.2:8080 on Windows IE you will see is the same than your Mac Safari http://localhost:8080/ or http://127.0.0.1:8080
I had the same problem when trying to load Hadoop project in eclipse. I tried the solutions above, and I believe it might have worked in Eclipse Kepler... not even sure anymore (tried too many things).
With all the problems I was having, I decided to move on to Eclipse Luna, and the solutions above did not work for me.
There was another post that recommended changing the ... tag to package. I started doing that, and it would "clear" the errors... However, I start to think that the changes would bite me later - I am not an expert on Maven.
Fortunately, I found out how to remove all the errors. Go to Window->Preferences->Maven-> Error/Warnings and change "Plugin execution not covered by lifecycle..." option to "Ignore". Hope it helps.
I have the same issue with IIS running on my home server, on the client machine a command like ipconfig /flushdns
usually solves the problem.
Here's a solution in pure PIL.
def blend_value(under, over, a):
return (over*a + under*(255-a)) / 255
def blend_rgba(under, over):
return tuple([blend_value(under[i], over[i], over[3]) for i in (0,1,2)] + [255])
white = (255, 255, 255, 255)
im = Image.open(object.logo.path)
p = im.load()
for y in range(im.size[1]):
for x in range(im.size[0]):
p[x,y] = blend_rgba(white, p[x,y])
im.save('/tmp/output.png')
With java 8 you can do this:
Long nVal = Optional.ofNullable(resultSet.getBigDecimal("col_name"))
.map(BigDecimal::longValue).orElse(null));
In that case you ensure that the nVal will be null (and not zero) if the SQL value is NULL
Here you can find some public REST services for encryption and security related things: http://security.jelastic.servint.net
Does an Integer variable in C occupy 2 bytes or 4 bytes?
That depends on the platform you're using, as well as how your compiler is configured. The only authoritative answer is to use the sizeof
operator to see how big an integer is in your specific situation.
What are the factors that it depends on?
Range might be best considered, rather than size. Both will vary in practice, though it's much more fool-proof to choose variable types by range than size as we shall see. It's also important to note that the standard encourages us to consider choosing our integer types based on range rather than size, but for now let's ignore the standard practice, and let our curiosity explore sizeof
, bytes and CHAR_BIT
, and integer representation... let's burrow down the rabbit hole and see it for ourselves...
sizeof
, bytes and CHAR_BIT
The following statement, taken from the C standard (linked to above), describes this in words that I don't think can be improved upon.
The
sizeof
operator yields the size (in bytes) of its operand, which may be an expression or the parenthesized name of a type. The size is determined from the type of the operand.
Assuming a clear understanding will lead us to a discussion about bytes. It's commonly assumed that a byte is eight bits, when in fact CHAR_BIT
tells you how many bits are in a byte. That's just another one of those nuances which isn't considered when talking about the common two (or four) byte integers.
Let's wrap things up so far:
sizeof
=> size in bytes, andCHAR_BIT
=> number of bits in byteThus, Depending on your system, sizeof (unsigned int)
could be any value greater than zero (not just 2 or 4), as if CHAR_BIT
is 16, then a single (sixteen-bit) byte has enough bits in it to represent the sixteen bit integer described by the standards (quoted below). That's not necessarily useful information, is it? Let's delve deeper...
Integer representation
The C standard specifies the minimum precision/range for all standard integer types (and CHAR_BIT
, too, fwiw) here. From this, we can derive a minimum for how many bits are required to store the value, but we may as well just choose our variables based on ranges. Nonetheless, a huge part of the detail required for this answer resides here. For example, the following that the standard unsigned int
requires (at least) sixteen bits of storage:
UINT_MAX 65535 // 2¹6 - 1
Thus we can see that unsigned int
require (at least) 16 bits, which is where you get the two bytes (assuming CHAR_BIT
is 8)... and later when that limit increased to 2³² - 1
, people were stating 4 bytes instead. This explains the phenomena you've observed:
Most of the textbooks say integer variables occupy 2 bytes. But when I run a program printing the successive addresses of an array of integers it shows the difference of 4.
You're using an ancient textbook and compiler which is teaching you non-portable C; the author who wrote your textbook might not even be aware of CHAR_BIT
. You should upgrade your textbook (and compiler), and strive to remember that I.T. is an ever-evolving field that you need to stay ahead of to compete... Enough about that, though; let's see what other non-portable secrets those underlying integer bytes store...
Value bits are what the common misconceptions appear to be counting. The above example uses an unsigned
integer type which typically contains only value bits, so it's easy to miss the devil in the detail.
Sign bits... In the above example I quoted UINT_MAX
as being the upper limit for unsigned int
because it's a trivial example to extract the value 16
from the comment. For signed types, in order to distinguish between positive and negative values (that's the sign), we need to also include the sign bit.
INT_MIN -32768 // -(2¹5) INT_MAX +32767 // 2¹5 - 1
Padding bits... While it's not common to encounter computers that have padding bits in integers, the C standard allows that to happen; some machines (i.e. this one) implement larger integer types by combining two smaller (signed) integer values together... and when you combine signed integers, you get a wasted sign bit. That wasted bit is considered padding in C. Other examples of padding bits might include parity bits and trap bits.
As you can see, the standard seems to encourage considering ranges like INT_MIN
..INT_MAX
and other minimum/maximum values from the standard when choosing integer types, and discourages relying upon sizes as there are other subtle factors likely to be forgotten such as CHAR_BIT
and padding bits which might affect the value of sizeof (int)
(i.e. the common misconceptions of two-byte and four-byte integers neglects these details).
For simple code, may be i think
import os
os.system('youtube-dl [OPTIONS] URL [URL...]')
Above is just running command line inside python.
Other is mentioned in the documentation Using youtube-dl on python Here is the way
from __future__ import unicode_literals
import youtube_dl
ydl_opts = {}
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
ydl.download(['https://www.youtube.com/watch?v=BaW_jenozKc'])
Java 8
return Collections.list(httpServletRequest.getParameterNames())
.stream()
.collect(Collectors.toMap(parameterName -> parameterName, httpServletRequest::getParameterValues));
select parentTable.id from parentTable
left outer join childTable on (parentTable.id = childTable.parentTableID)
where childTable.id is null
This approach ensures that you can close a popover by clicking anywhere on the page. If you click on another clickable entity, it hides all other popovers. The animation:false is required else you will get a jquery .remove error in your console.
$('.clickable').popover({
trigger: 'manual',
animation: false
}).click (evt) ->
$('.clickable').popover('hide')
evt.stopPropagation()
$(this).popover('show')
$('html').on 'click', (evt) ->
$('.clickable').popover('hide')
All the above solutions require two database calls. The below sql code combine two sql statements into one.
select * from foo
where (
id = IFNULL((select min(id) from foo where id > 4),0)
or id = IFNULL((select max(id) from foo where id < 4),0)
)
Test it yourself, but here's the output.
php -r '$a=array("a","b","c"); print_r($a); unset($a[1]); print_r($a);'
Array
(
[0] => a
[1] => b
[2] => c
)
Array
(
[0] => a
[2] => c
)
According to Apple's Data Formatting Guide
Creating a date formatter is not a cheap operation. If you are likely to use a formatter frequently, it is typically more efficient to cache a single instance than to create and dispose of multiple instances. One approach is to use a static variable
And while I agree with @Leon that this should be failable initializer, when you enter seed data, we could have one that isn't failable (just like there is UIImage(imageLiteralResourceName:)
).
So here's my approach:
extension DateFormatter {
static let yyyyMMdd: DateFormatter = {
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd"
formatter.calendar = Calendar(identifier: .iso8601)
formatter.timeZone = TimeZone(secondsFromGMT: 0)
formatter.locale = Locale(identifier: "en_US_POSIX")
return formatter
}()
}
extension Date {
init?(yyyyMMdd: String) {
guard let date = DateFormatter.yyyyMMdd.date(from: yyyyMMdd) else { return nil }
self.init(timeInterval: 0, since: date)
}
init(dateLiteralString yyyyMMdd: String) {
let date = DateFormatter.yyyyMMdd.date(from: yyyyMMdd)!
self.init(timeInterval: 0, since: date)
}
}
And now enjoy simply calling:
// For seed data
Date(dateLiteralString: "2020-03-30")
// When parsing data
guard let date = Date(yyyyMMdd: "2020-03-30") else { return nil }
You can still use the Authorization header with OAuth 2.0. There is a Bearer type specified in the Authorization header for use with OAuth bearer tokens (meaning the client app simply has to present ("bear") the token). The value of the header is the access token the client received from the Authorization Server.
It's documented in this spec: https://tools.ietf.org/html/rfc6750#section-2.1
E.g.:
GET /resource HTTP/1.1
Host: server.example.com
Authorization: Bearer mF_9.B5f-4.1JqM
Where mF_9.B5f-4.1JqM is your OAuth access token.
You need to implement the equals() method in your MyClass
.
The reason that ==
didn't work is this is checking that they refer to the same instance. Since you did new
for each, each one is a different instance.
The reason that equals()
didn't work is because you didn't implement it yourself yet. I believe it's default behavior is the same thing as ==
.
Note that you should also implement hashcode()
if you're going to implement equals()
because a lot of java.util Collections expect that.
I got the same error with a different problem,
I used namespaces in my headers and forgot the closing bracket and got this cryptic error instead.
Return min and max value in tuple:
def side_values(num_list):
results_list = sorted(num_list)
return results_list[0], results_list[-1]
somelist = side_values([1,12,2,53,23,6,17])
print(somelist)
All you need is convert string
to int
with +
and convert the result to boolean with !!
:
var response = {"isChecked":"1"};
response.isChecked = !!+response.isChecked
You can do this manipulation in the parse
method:
parse: function (response) {
response.isChecked = !!+response.isChecked;
return response;
}
UPDATE: 7 years later, I find Number(string)
conversion more elegant. Also mutating an object is not the best idea. That being said:
parse: function (response) {
return Object.assign({}, response, {
isChecked: !!Number(response.isChecked), // OR
isChecked: Boolean(Number(response.isChecked))
});
}
To get to a specific committed code, you need the hash code of that commit. You can get that hash code in two ways:
git log
and check your recent commits on that branch. It will show you the hash code of your commit and the message you leaved while you were committing your code. Just copy and then do git checkout commit_hash_code
After moving to that code, if you want to work on it and make changes, you should make another branch with git checkout -b <new-branch-name>
, otherwise, the changes will not be retained.
Function xrand() As Long
Dim r1 As Long = Now.Day & Now.Month & Now.Year & Now.Hour & Now.Minute & Now.Second & Now.Millisecond
Dim RAND As Long = Math.Max(r1, r1 * 2)
Return RAND
End Function
[BBOYSE] This its the best way, from scratch :P
We can get everything we want by injecting one style rule and by intercepting zoom events:
$(function () {
if (!(/iPad|iPhone|iPod/.test(navigator.userAgent))) return
$(document.head).append(
'<style>*{cursor:pointer;-webkit-tap-highlight-color:rgba(0,0,0,0)}</style>'
)
$(window).on('gesturestart touchmove', function (evt) {
if (evt.originalEvent.scale !== 1) {
evt.originalEvent.preventDefault()
document.body.style.transform = 'scale(1)'
}
})
})
? Disables pinch zoom.
? Disables double-tap zoom.
? Scroll is not affected.
? Disables tap highlight (which is triggered, on iOS, by the style rule).
NOTICE: Tweak the iOS-detection to your liking. More on that here.
Apologies to lukejackson and Piotr Kowalski, whose answers appear in modified form in the code above.
For me, disk space was low, and files that couldn't be written were expected to be present later. Other answers mentioned missing files (or misnamed/improperly referenced-by-name files)--but the root cause was lack of disk space.
After coming here for help, I made my own solution and wanted to share it. It's based on user2363986's answer, but I think this is more scalable. Meaning, that if you have 1000 extensions, the code will still look somewhat elegant.
from glob import glob
directoryPath = "C:\\temp\\*."
fileExtensions = [ "jpg", "jpeg", "png", "bmp", "gif" ]
listOfFiles = []
for extension in fileExtensions:
listOfFiles.extend( glob( directoryPath + extension ))
for file in listOfFiles:
print(file) # Or do other stuff
<!doctype html>
<html lang="en">
<head>
<style id="myStyleSheet">
...
</style>
var column = 3;
var styleSheet = document.getElementById("myStyleSheet").sheet;
var rule = "table tr td:nth-child("+ column +"),table th:nth-child("+ column +")
{display: none}";
styleSheet.insertRule(rule);
Add
@Produces({"image/jpeg,image/png"})
to
@POST
@Path("/pdf")
@Consumes({ MediaType.MULTIPART_FORM_DATA })
@Produces({"image/jpeg,image/png"})
//@Produces("text/plain")
public Response uploadPdfFile(@FormDataParam("file") InputStream fileInputStream,@FormDataParam("file") FormDataContentDisposition fileMetaData) throws Exception {
...
}
Just a quick power set refresher !
Power set of a set X, is simply the set of all subsets of X including the empty set
Example set X = (a,b,c)
Power Set = { { a , b , c } , { a , b } , { a , c } , { b , c } , { a } , { b } , { c } , { } }
Here is another way of finding power set:
def power_set(input):
# returns a list of all subsets of the list a
if (len(input) == 0):
return [[]]
else:
main_subset = [ ]
for small_subset in power_set(input[1:]):
main_subset += [small_subset]
main_subset += [[input[0]] + small_subset]
return main_subset
print(power_set([0,1,2,3]))
full credit to source
Spring MVC will give you the HttpRequest if you just add it to your controller method signature:
For instance:
/**
* Generate a PDF report...
*/
@RequestMapping(value = "/report/{objectId}", method = RequestMethod.GET)
public @ResponseBody void generateReport(
@PathVariable("objectId") Long objectId,
HttpServletRequest request,
HttpServletResponse response) {
// ...
// Here you can use the request and response objects like:
// response.setContentType("application/pdf");
// response.getOutputStream().write(...);
}
As you see, simply adding the HttpServletRequest
and HttpServletResponse
objects to the signature makes Spring MVC to pass those objects to your controller method. You'll want the HttpSession
object too.
EDIT: It seems that HttpServletRequest/Response are not working for some people under Spring 3. Try using Spring WebRequest/WebResponse objects as Eduardo Zola pointed out.
I strongly recommend you to have a look at the list of supported arguments that Spring MVC is able to auto-magically inject to your handler methods.
For each iteration of the ng-repeat loop, line
is a reference to an object in your array. Therefore, to preview the value, use {{line.text}}
.
Similarly, to databind to the text, databind to the same: ng-model="line.text"
. You don't need to use value
when using ng-model (actually you shouldn't).
For a more in-depth look at scopes and ng-repeat, see What are the nuances of scope prototypal / prototypical inheritance in AngularJS?, section ng-repeat.
Answers above are shown how to remove an array and here is how to pull an object from an array.
Reference: https://docs.mongodb.com/manual/reference/operator/update/pull/
db.survey.update( // select your doc in moongo
{ }, // your query, usually match by _id
{ $pull: { results: { $elemMatch: { score: 8 , item: "B" } } } }, // item(s) to match from array you want to pull/remove
{ multi: true } // set this to true if you want to remove multiple elements.
)
The find
method returns a Cursor
instance, which allows you to iterate over all matching documents.
To get the first document that matches the given criteria you need to use find_one
. The result of find_one
is a dictionary.
You can always use the list
constructor to return a list of all the documents in the collection but bear in mind that this will load all the data in memory and may not be what you want.
You should do that if you need to reuse the cursor and have a good reason not to use rewind()
Demo using find
:
>>> import pymongo
>>> conn = pymongo.MongoClient()
>>> db = conn.test #test is my database
>>> col = db.spam #Here spam is my collection
>>> cur = col.find()
>>> cur
<pymongo.cursor.Cursor object at 0xb6d447ec>
>>> for doc in cur:
... print(doc) # or do something with the document
...
{'a': 1, '_id': ObjectId('54ff30faadd8f30feb90268f'), 'b': 2}
{'a': 1, 'c': 3, '_id': ObjectId('54ff32a2add8f30feb902690'), 'b': 2}
Demo using find_one
:
>>> col.find_one()
{'a': 1, '_id': ObjectId('54ff30faadd8f30feb90268f'), 'b': 2}
Since I don't have a 50 reputation Stackoverflow wont let me comment on the second best answer. Found another trick for finding the culprit label in the Storyboard.
So once you know the id of the label, open your storyboard in a seperate tab with view controllers displayed and just do command F and command V and will take you straight to that label :)
Copy and paste the following into a new .htaccess
file and place it on your website's root folder :
php_flag display_errors on
php_flag display_startup_errors on
Errors will be shown directly in your page.
That's the best way to debug quickly but don't use it for long time because it could be a security breach.
I would recommend that you use display: inline;
. float
is screwed up in IE. Here is an example of how I would approach it:
<ul class="side-by-side">
<li>item 1<li>
<li>item 2<li>
<li>item 3<li>
</ul>
and here's the css:
.side-by-side {
width: 100%;
border: 1px solid black;
}
.side-by-side li {
display: inline;
}
Also, if you use floats the ul
will not wrap around the li
's and will instead have a hight of 0 in this example:
.side-by-side li {
float: left;
}
1) Go to your project and find ".settings" directory this one
2) Open file xml named:
org.eclipse.wst.common.project.facet.core.xml
3)
<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
<fixed facet="wst.jsdt.web"/>
<installed facet="java" version="1.5"/>
<installed facet="jst.web" version="2.3"/>
<installed facet="wst.jsdt.web" version="1.0"/>
</faceted-project>
Change jst.web version to 3.0 and java version to 1.7 or 1.8 (base on your current using jdk version)
4) Change your web.xml
file under WEB-INF
directory , please refer to this article:
https://www.mkyong.com/web-development/the-web-xml-deployment-descriptor-examples/
5) Go to pom.xml
file and paste these lines:
<build>
<finalName>YOUR_PROJECT_NAME</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source> THIS IS YOUR USING JDK's VERSION
<target>1.8</target> SAME AS ABOVE
</configuration>
</plugin>
</plugins>
</build>
<link rel="shortcut icon" href="@Url.Content("~/images/")favicon.ico" type="image/x-icon"/ >
This works for me in MVC4 application favicon image is placed in the images folder and it will traverse from root directory to images and find favicon.ico bingo!
The thing that tripped me up on this problem was that I thought that the need for a key applied to what looks like 'real' or DOM HTML elements as opposed to JSX elements that I have defined.
Of course with React we are working with a virtual DOM so the React JSX elements we define <MyElement>
are just as important to it as the elements that look like real DOM HTML elements like <div>
.
Does that make sense?
You may consider declaring the variables with moudule level scope. Module-level variable is available to all of the procedures in that module, but it is not available to procedures in other modules
For details on Scope of variables
refer this link
Please copy the below code into any module, save the workbook and then run the code.
Here is what code does
The sample subroutine sets the folder path & later the file path. Kindly set them accordingly before you run the code.
I have added a function IsWorkBookOpen to check if workbook is already then set the workbook variable the workbook name else open the workbook which will be assigned to workbook variable accordingly.
Dim wbA As Workbook
Dim wbB As Workbook
Sub MySubRoutine()
Dim folderPath As String, fileNm1 As String, fileNm2 As String, filePath1 As String, filePath2 As String
folderPath = ThisWorkbook.Path & "\"
fileNm1 = "file1.xlsx"
fileNm2 = "file2.xlsx"
filePath1 = folderPath & fileNm1
filePath2 = folderPath & fileNm2
If IsWorkBookOpen(filePath1) Then
Set wbA = Workbooks(fileNm1)
Else
Set wbA = Workbooks.Open(filePath1)
End If
If IsWorkBookOpen(filePath2) Then
Set wbB = Workbooks.Open(fileNm2)
Else
Set wbB = Workbooks.Open(filePath2)
End If
' your code here
End Sub
Function IsWorkBookOpen(FileName As String)
Dim ff As Long, ErrNo As Long
On Error Resume Next
ff = FreeFile()
Open FileName For Input Lock Read As #ff
Close ff
ErrNo = Err
On Error GoTo 0
Select Case ErrNo
Case 0: IsWorkBookOpen = False
Case 70: IsWorkBookOpen = True
Case Else: Error ErrNo
End Select
End Function
Using Prompt to select the file use below code.
Dim wbA As Workbook
Dim wbB As Workbook
Sub MySubRoutine()
Dim folderPath As String, fileNm1 As String, fileNm2 As String, filePath1 As String, filePath2 As String
Dim filePath As String
cmdBrowse_Click filePath, 1
filePath1 = filePath
'reset the variable
filePath = vbNullString
cmdBrowse_Click filePath, 2
filePath2 = filePath
fileNm1 = GetFileName(filePath1, "\")
fileNm2 = GetFileName(filePath2, "\")
If IsWorkBookOpen(filePath1) Then
Set wbA = Workbooks(fileNm1)
Else
Set wbA = Workbooks.Open(filePath1)
End If
If IsWorkBookOpen(filePath2) Then
Set wbB = Workbooks.Open(fileNm2)
Else
Set wbB = Workbooks.Open(filePath2)
End If
' your code here
End Sub
Function IsWorkBookOpen(FileName As String)
Dim ff As Long, ErrNo As Long
On Error Resume Next
ff = FreeFile()
Open FileName For Input Lock Read As #ff
Close ff
ErrNo = Err
On Error GoTo 0
Select Case ErrNo
Case 0: IsWorkBookOpen = False
Case 70: IsWorkBookOpen = True
Case Else: Error ErrNo
End Select
End Function
Private Sub cmdBrowse_Click(ByRef filePath As String, num As Integer)
Dim fd As FileDialog
Set fd = Application.FileDialog(msoFileDialogFilePicker)
fd.AllowMultiSelect = False
fd.Title = "Select workbook " & num
fd.InitialView = msoFileDialogViewSmallIcons
Dim FileChosen As Integer
FileChosen = fd.Show
fd.Filters.Clear
fd.Filters.Add "Excel macros", "*.xlsx"
fd.FilterIndex = 1
If FileChosen <> -1 Then
MsgBox "You chose cancel"
filePath = ""
Else
filePath = fd.SelectedItems(1)
End If
End Sub
Function GetFileName(fullName As String, pathSeparator As String) As String
Dim i As Integer
Dim iFNLenght As Integer
iFNLenght = Len(fullName)
For i = iFNLenght To 1 Step -1
If Mid(fullName, i, 1) = pathSeparator Then Exit For
Next
GetFileName = Right(fullName, iFNLenght - i)
End Function
I use such kind of a Map population thanks to Java 9. In my honest opinion, this approach provides more readability to the code.
public static void main(String[] args) {
Map<Integer, Point2D.Double> map = Map.of(
1, new Point2D.Double(1, 1),
2, new Point2D.Double(2, 2),
3, new Point2D.Double(3, 3),
4, new Point2D.Double(4, 4));
map.entrySet().forEach(System.out::println);
}
In the Code::Blocks IDE, navigate Settings -> Debugger
In the tree control at the right, select Common -> GDB/CDB debugger -> Common.
Then in the dialog at the left you can enter Executable path and choose Debugger type = GDB or CDB, as well as configuring various other options.
From other member and my problem:
Camera Rotation issue depend on different Devices and certain Version.
Version 1.6: to fix the Rotation Issue, and it is good for most of devices
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
{
p.set("orientation", "portrait");
p.set("rotation",90);
}
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE)
{
p.set("orientation", "landscape");
p.set("rotation", 90);
}
Version 2.1: depend on kind of devices, for example, Cannt fix the issue with XPeria X10, but it is good for X8, and Mini
Camera.Parameters parameters = camera.getParameters();
parameters.set("orientation", "portrait");
camera.setParameters(parameters);
Version 2.2: not for all devices
camera.setDisplayOrientation(90);
The dig utility is pretty convenient to use. The order of the arguments don't really matter.I'll show you some easy examples.
To get all root name servers use
# dig
To get a TXT record of a specific host use
# dig example.com txt
# dig host.example.com txt
To query a specific name server just add @nameserver.tld
# dig host.example.com txt @a.iana-servers.net
The SPF RFC4408 says that SPF records can be stored as SPF or TXT. However nearly all use only TXT records at the moment. So you are pretty safe if you only fetch TXT records.
I made a SPF checker for visualising the SPF records of a domain. It might help you to understand SPF records better. You can find it here: http://spf.myisp.ch
Got it:
CSS:
box-shadow: inset 0 0 0 1000px gold;
Works for all boxes - including table cells !!!
To sort by second field only (thus where second fields match, those lines with matches remain in the order they are in the original without sorting on other fields) :
sort -k 2,2 -s orig_file > sorted_file
Here's a sample code:
Exec sp_add_schedule
@schedule_name = N'SchedulName'
@freq_type = 1
@active_start_time = 08300
If you look at the documentation for JObject
, you will see that it implements IEnumerable<KeyValuePair<string, JToken>>
. So, you can iterate over it simply using a foreach
:
foreach (var x in obj)
{
string name = x.Key;
JToken value = x.Value;
…
}
Swift 4 Dictionary
extension.
extension Dictionary {
var jsonStringRepresentation: String? {
guard let theJSONData = try? JSONSerialization.data(withJSONObject: self,
options: [.prettyPrinted]) else {
return nil
}
return String(data: theJSONData, encoding: .ascii)
}
}
Plugin to quickly go to any file in solution Sonic file finder (free)
Fast switching between .h and .cpp file Macro available here (free)
And that's it =)
you can use: content:url("image.jpg")
<style>
.your-class-name{
content: url("http://imgur.com/SZ8Cm.jpg");
}
</style>
<img class="your-class-name" src="..."/>
To insert a VARCHAR2
into a BLOB
column you can rely on the function utl_raw.cast_to_raw
as next:
insert into mytable(id, myblob) values (1, utl_raw.cast_to_raw('some magic here'));
It will cast your input VARCHAR2
into RAW
datatype without modifying its content, then it will insert the result into your BLOB
column.
More details about the function utl_raw.cast_to_raw
int number = 123;
stringstream = s;
s << number;
cout << ss.str() << endl;
VideoView myVideo = (VideoView) rootView.findViewById(R.id.definition_video_view);
//Set video name (no extension)
String myVideoName = "my_video";
//Set app package
String myAppPackage = "com.myapp";
//Get video URI from raw directory
Uri myVideoUri = Uri.parse("android.resource://"+myAppPackage+"/raw/"+myVideoName);
//Set the video URI
myVideo.setVideoURI(myVideoUri);
//Play the video
myVideo.start();
I had the same problem as the OP except I remembered to declare the ReadOnlyVariables.
After some playing around, I discovered it was the name of my variable that was the issue. "File_Path" in SSIS somehow got converted to "FilePath". C# does not play nicely with underscores in variable names.
So to access the variable, I type
string fp = Variables.FilePath;
In the PreExecute() method of the Script Component.
The hexadecimal value you are looking for is %2B
To get it automatically in PHP run your string through urlencode($stringVal)
. And then run it rhough urldecode($stringVal)
to get it back.
If you want the JavaScript to handle it, use escape( str )
Edit
After @bobince's comment I did more reading and he is correct.
Use encodeURIComponent(str)
and decodeURIComponent(str)
. Escape will not convert the characters, only escape them with \
's
Try this:
var date = new Date();
console.log(date instanceof Date && !isNaN(date.valueOf()));
This should return true
.
UPDATED: Added isNaN
check to handle the case commented by Julian H. Lam
it's well documented here:
https://cwiki.apache.org/confluence/display/TOMCAT/Connectors#Connectors-Q6
How do I bind to a specific ip address? - "Each Connector element allows an address property. See the HTTP Connector docs or the AJP Connector docs". And HTTP Connectors docs:
http://tomcat.apache.org/tomcat-7.0-doc/config/http.html
Standard Implementation -> address
"For servers with more than one IP address, this attribute specifies which address will be used for listening on the specified port. By default, this port will be used on all IP addresses associated with the server."
Solved it. So by default, all packages that falls under @SpringBootApplication
declaration will be scanned.
Assuming my main class ExampleApplication
that has @SpringBootApplication
declaration is declared inside com.example.something
, then all components that falls under com.example.something
is scanned while com.example.applicant
will not be scanned.
So, there are two ways to do it based on this question. Use
@SpringBootApplication(scanBasePackages={
"com.example.something", "com.example.application"})
That way, the application will scan all the specified components, but I think what if the scale were getting bigger ?
So I use the second approach, by restructuring my packages and it worked ! Now my packages structure became like this.
src/
+-- main/
¦ +-- java/
| +-- com.example/
| | +-- Application.java
| +-- com.example.model/
| | +-- User.java
| +-- com.example.controller/
| | +-- IndexController.java
| | +-- UsersController.java
| +-- com.example.service/
| +-- UserService.java
+-- resources/
+-- application.properties
It's a ProgressDialog, with setIndeterminate(true).
From http://developer.android.com/guide/topics/ui/dialogs.html#ProgressDialog
ProgressDialog dialog = ProgressDialog.show(MyActivity.this, "",
"Loading. Please wait...", true);
An indeterminate progress bar doesn't actually show a bar, it shows a spinning activity circle thing. I'm sure you know what I mean :)
According to the spec RFC 2045 #Syntax of the Content-Type Header Field application/myappname
is not allowed, but application/x-myappname
is allowed and sounds most appropriate for you're application to me.
Have you tried Refinements?
module Nothingness
refine String do
alias_method :nothing?, :empty?
end
refine NilClass do
alias_method :nothing?, :nil?
end
end
using Nothingness
return my_string.nothing?
For getting the path of running jar file I have studied the above solutions and tried all methods which exist some difference each other. If these code are running in Eclipse IDE they all should be able to find the path of the file including the indicated class and open or create an indicated file with the found path.
But it is tricky, when run the runnable jar file directly or through the command line, it will be failed as the path of jar file gotten from the above methods will give an internal path in the jar file, that is it always gives a path as
rsrc:project-name (maybe I should say that it is the package name of the main class file - the indicated class)
I can not convert the rsrc:... path to an external path, that is when run the jar file outside the Eclipse IDE it can not get the path of jar file.
The only possible way for getting the path of running jar file outside Eclipse IDE is
System.getProperty("java.class.path")
this code line may return the living path (including the file name) of the running jar file (note that the return path is not the working directory), as the java document and some people said that it will return the paths of all class files in the same directory, but as my tests if in the same directory include many jar files, it only return the path of running jar (about the multiple paths issue indeed it happened in the Eclipse).
The "BIGINT(20)" specification isn't a digit limit. It just means that when the data is displayed, if it uses less than 20 digits it will be left-padded with zeros. 2^64 is the hard limit for the BIGINT type, and has 20 digits itself, hence BIGINT(20) just means everything less than 10^20 will be left-padded with spaces on display.
Or you might have something like this (redeclaring a variable):
var data = [];
var data =
What...
A methodology for automaticaly testing code against a battery of tests, designed to enforce desired outcomes and manage change.
A "unit" in this sense is the smallest atomic component of the code that makes sense to test, typically a method of some class for example. Part of this process is building up stub objects (or "mocks") which allow you to work with a unit as an independant object.
How...
Almost always, the process of unit-testing is built into an IDE (or through extensions) such that it executes the tests with every compile. A number of frameworks exist for assisting the creation of unit tests (and indeed mock objcts), often named fooUnit (cf. jUnit, xUnit, nUnit). These frameworks provide a formalised way to create tests.
As a process, test driven development (TDD) is often the motivation for unit testing (but unit testing does not require TDD) which supposes that the tests are a part of the spec definition, and therefore requires that they are written first, with code only written to "solve" these tests.
When...
Almost always. Very small, throwaway projects may not be worth it, but only if you're quite sure they really are throwaway. In theory every object orientated program is unit testable, but some design pattrns make this difficult. Notoriously, the singleton pattern is problematic, where conversely dependancy injection frameworks are very much unit testing oriented.
There are two distinct but closely related problems in establishing a secure communication
Both of these problems can be elegantly solved using public key cryptography.
I. Encryption and decryption of data
Alice wants to send a message to Bob which no one should be able to read.
Note that if A wants to send a message to B, A needs to use the Public key of B (which is publicly available to anyone) and neither public nor private key of A comes into picture here.
So if you want to send a message to me you should know and use my public key which I provide to you and only I will be able to decrypt the message since I am the only one who has access to the corresponding private key.
II. Verify the identity of sender (Authentication)
Alice wants to send a message to Bob again. The problem of encrypting the data is solved using the above method.
But what if I am sitting between Alice and Bob, introducing myself as 'Alice' to Bob and sending my own message to Bob instead of forwarding the one sent by Alice. Even though I can not decrypt and read the original message sent by Alice(that requires access to Bob's private key) I am hijacking the entire conversation between them.
Is there a way Bob can confirm that the messages he is receiving are actually sent by Alice?
I would just do:
private static Timer timer;
private static void Main()
{
timer = new Timer(_ => OnCallBack(), null, 1000 * 10,Timeout.Infinite); //in 10 seconds
Console.ReadLine();
}
private static void OnCallBack()
{
timer.Dispose();
Thread.Sleep(3000); //doing some long operation
timer = new Timer(_ => OnCallBack(), null, 1000 * 10,Timeout.Infinite); //in 10 seconds
}
And ignore the period parameter, since you're attempting to control the periodicy yourself.
Your original code is running as fast as possible, since you keep specifying 0
for the dueTime
parameter. From Timer.Change
:
If dueTime is zero (0), the callback method is invoked immediately.
One line version:
String text = ((Spinner)findViewById(R.id.spinner)).getSelectedItem().toString();
UPDATE: You can remove casting if you use SDK 26 (or newer) to compile your project.
String text = findViewById(R.id.spinner).getSelectedItem().toString();
A PDOStatement
(which you have in $users
) is a forward-cursor. That means, once consumed (the first foreach
iteration), it won't rewind to the beginning of the resultset.
You can close the cursor after the foreach
and execute the statement again:
$users = $dbh->query($sql);
foreach ($users as $row) {
print $row["name"] . "-" . $row["sex"] ."<br/>";
}
$users->execute();
foreach ($users as $row) {
print $row["name"] . "-" . $row["sex"] ."<br/>";
}
Or you could cache using tailored CachingIterator
with a fullcache:
$users = $dbh->query($sql);
$usersCached = new CachedPDOStatement($users);
foreach ($usersCached as $row) {
print $row["name"] . "-" . $row["sex"] ."<br/>";
}
foreach ($usersCached as $row) {
print $row["name"] . "-" . $row["sex"] ."<br/>";
}
You find the CachedPDOStatement
class as a gist. The caching itertor is probably more sane than storing the resultset into an array because it still offers all properties and methods of the PDOStatement
object it has wrapped.
Would these work?
plt.scatter(np.random.randn(100), np.random.randn(100), facecolors='none')
or using plot()
plt.plot(np.random.randn(100), np.random.randn(100), 'o', mfc='none')
The below code works for me, for both accessing and changing a pixel value.
For accessing pixel's channel value :
for (int i = 0; i < image.cols; i++) {
for (int j = 0; j < image.rows; j++) {
Vec3b intensity = image.at<Vec3b>(j, i);
for(int k = 0; k < image.channels(); k++) {
uchar col = intensity.val[k];
}
}
}
For changing a pixel value of a channel :
uchar pixValue;
for (int i = 0; i < image.cols; i++) {
for (int j = 0; j < image.rows; j++) {
Vec3b &intensity = image.at<Vec3b>(j, i);
for(int k = 0; k < image.channels(); k++) {
// calculate pixValue
intensity.val[k] = pixValue;
}
}
}
`
Source : Accessing pixel value
No need to do this yourself, the Magento system has a built-in for cleaning up log information. If you go to
System > Configuration > Advanced > System > Log Cleaning
You can configure your store to automatically clean up these logs.
Easy, you can dissect the time to get separate values for current time, as follows:
Calendar cal = Calendar.getInstance();
int millisecond = cal.get(Calendar.MILLISECOND);
int second = cal.get(Calendar.SECOND);
int minute = cal.get(Calendar.MINUTE);
//12 hour format
int hour = cal.get(Calendar.HOUR);
//24 hour format
int hourofday = cal.get(Calendar.HOUR_OF_DAY);
Same goes for the date, as follows:
Calendar cal = Calendar.getInstance();
int dayofyear = cal.get(Calendar.DAY_OF_YEAR);
int year = cal.get(Calendar.YEAR);
int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
int dayofmonth = cal.get(Calendar.DAY_OF_MONTH);
Modern BASH has support for regular expressions:
while read -r line; do
if [[ $line =~ ^potato:\ ([0-9]+) ]]; then
echo "${BASH_REMATCH[1]}"
fi
done
As others have said,
new String[0]
will indeed create an empty array. However, there's one nice thing about arrays - their size can't change, so you can always use the same empty array reference. So in your code, you can use:
private static final String[] EMPTY_ARRAY = new String[0];
and then just return EMPTY_ARRAY
each time you need it - there's no need to create a new object each time.
The FOR-LOOP generally works, but there are some issues. The FOR doesn't accept empty lines and lines with more than ~8190 are problematic. The expansion works only reliable, if the delayed expansion is disabled.
Detection of CR/LF versus single LF seems also a little bit complicated.
Also NUL characters are problematic, as a FOR-Loop immediatly cancels the reading.
Direct binary reading seems therefore nearly impossible.
The problem with empty lines can be solved with a trick. Prefix each line with a line number, using the findstr command, and after reading, remove the prefix.
@echo off
SETLOCAL DisableDelayedExpansion
FOR /F "usebackq delims=" %%a in (`"findstr /n ^^ t.txt"`) do (
set "var=%%a"
SETLOCAL EnableDelayedExpansion
set "var=!var:*:=!"
echo(!var!
ENDLOCAL
)
Toggling between enable and disabled delayed expansion is neccessary for the safe working with strings, like !
or ^^^xy!z
.
That's because the line set "var=%%a"
is only safe with DisabledDelayedExpansion, else exclamation marks are removed and the carets are used as (secondary) escape characters and they are removed too.
But using the variable var
is only safe with EnabledDelayedExpansion, as even a call %%var%%
will fail with content like "&"&
.
EDIT: Added set/p variant
There is a second way of reading a file with set /p
, the only disadvantages are that it is limited to ~1024 characters per line and it removes control characters at the line end.
But the advantage is, you didn't need the delayed toggling and it's easier to store values in variables
@echo off
setlocal EnableDelayedExpansion
set "file=%~1"
for /f "delims=" %%n in ('find /c /v "" %file%') do set "len=%%n"
set "len=!len:*: =!"
<%file% (
for /l %%l in (1 1 !len!) do (
set "line="
set /p "line="
echo(!line!
)
)
For reading it "binary" into a hex-representation
You could look at SO: converting a binary file to HEX representation using batch file
Before you know about the attributes of @property, you should know what is the use of @property.
@property offers a way to define the information that a class is intended to encapsulate. If you declare an object/variable using @property, then that object/variable will be accessible to other classes importing its class.
If you declare an object using @property in the header file, then you have to synthesize it using @synthesize in the implementation file. This makes the object KVC compliant. By default, compiler will synthesize accessor methods for this object.
accessor methods are : setter and getter.
Example: .h
@interface XYZClass : NSObject
@property (nonatomic, retain) NSString *name;
@end
.m
@implementation XYZClass
@synthesize name;
@end
Now the compiler will synthesize accessor methods for name.
XYZClass *obj=[[XYZClass alloc]init];
NSString *name1=[obj name]; // get 'name'
[obj setName:@"liza"]; // first letter of 'name' becomes capital in setter method
List of attributes of @property
atomic, nonatomic, retain, copy, readonly, readwrite, assign, strong, getter=method, setter=method, unsafe_unretained
atomic is the default behavior. If an object is declared as atomic then it becomes thread-safe. Thread-safe means, at a time only one thread of a particular instance of that class can have the control over that object.
If the thread is performing getter method then other thread cannot perform setter method on that object. It is slow.
@property NSString *name; //by default atomic`
@property (atomic)NSString *name; // explicitly declared atomic`
For this reason, it’s faster to access a nonatomic property than an atomic one.
@property (nonatomic)NSString *name;
The setter method will increase retain count of the object, so that it will occupy memory in autorelease pool.
@property (retain)NSString *name;
Even if a mutable string is set and subsequently changed, the instance captures whatever value it has at the time it is set. No setter and getter methods will be synthesized.
@property (copy) NSString *name;
now,
NSMutableString *nameString = [NSMutableString stringWithString:@"Liza"];
xyzObj.name = nameString;
[nameString appendString:@"Pizza"];
name will remain unaffected.
Compiler will generate a getter, but not a setter.
@property (readonly) NSString *name;
It is opposite of readonly.
@property (readwrite) NSString *name;
Keep in mind retain and assign are basically interchangeable when garbage collection is enabled.
@property (assign) NSInteger year;
It comes with ARC.
@property (nonatomic, strong) AVPlayer *player;
In the case of Boolean properties (properties that have a YES or NO value), it’s customary for the getter method to start with the word “is”
@property (getter=isFinished) BOOL finished;
The method should end with a colon.
@property(setter = boolBool:) BOOL finished;
An unsafe reference is similar to a weak reference in that it doesn’t keep its related object alive, but it won’t be set to nil if the destination object is deallocated.
@property (unsafe_unretained) NSObject *unsafeProperty;
If you need to specify multiple attributes, simply include them as a comma-separated list, like this:
@property (readonly, getter=isFinished) BOOL finished;
OK, so this is a little bit more complex then a simple regex, but it allows for different types of urls.
Examples:
All which should be marked as valid.
function is_valid_url($url) {
// First check: is the url just a domain name? (allow a slash at the end)
$_domain_regex = "|^[A-Za-z0-9-]+(\.[A-Za-z0-9-]+)*(\.[A-Za-z]{2,})/?$|";
if (preg_match($_domain_regex, $url)) {
return true;
}
// Second: Check if it's a url with a scheme and all
$_regex = '#^([a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))$#';
if (preg_match($_regex, $url, $matches)) {
// pull out the domain name, and make sure that the domain is valid.
$_parts = parse_url($url);
if (!in_array($_parts['scheme'], array( 'http', 'https' )))
return false;
// Check the domain using the regex, stops domains like "-example.com" passing through
if (!preg_match($_domain_regex, $_parts['host']))
return false;
// This domain looks pretty valid. Only way to check it now is to download it!
return true;
}
return false;
}
Note that there is a in_array check for the protocols that you want to allow (currently only http and https are in that list).
var_dump(is_valid_url('google.com')); // true
var_dump(is_valid_url('google.com/')); // true
var_dump(is_valid_url('http://google.com')); // true
var_dump(is_valid_url('http://google.com/')); // true
var_dump(is_valid_url('https://google.com')); // true
These both work for me in JavaScript and TypeScript
<img src="@/assets/images/logo.png" alt="">
or
<img src="./assets/images/logo.png" alt="">
I also had the same problem. It's easy to divide integer numbers but decimal numbers are not that easy.
if you have 2 numbers like 3.14 and 2.35 and divide the numbers then,
the code will be Division=echo 3.14 / 2.35 | bc
echo "$Division"
the quotes are different. Don't be confused, it's situated just under the esc button on your keyboard.
THE ONLY DIFFERENCE IS THE | bc and also here echo works as an operator for the arithmetic calculations in stead of printing.
So, I had added echo "$Division" for printing the value. Let me know if it works for you. Thank you.
You can also add hash when page is loading:
location.hash = "noBack";
Then just handle location hash change to add another hash:
$(window).on('hashchange', function() {
location.hash = "noBack";
});
That makes hash always present and back button tries to remove hash at first. Hash is then added again by "hashchange" handler - so page would never actually can be changed to previous one.
With tqdm (conda install tqdm
or pip install tqdm
) you can add a progress meter to your loops in a second:
from time import sleep
from tqdm import tqdm
for i in tqdm(range(10)):
sleep(3)
60%|¦¦¦¦¦¦ | 6/10 [00:18<00:12, 0.33 it/s]
Also, there is a notebook version:
from tqdm.notebook import tqdm
for i in tqdm(range(100)):
sleep(3)
You can use tqdm.auto
instead of tqdm.notebook
to work in both a terminal and notebooks.
tqdm.contrib
contains some helper functions to do things like enumerate
, map
, and zip
. There are concurrent maps in tqdm.contrib.concurrent
.
You can even get progress sent to your phone after disconnecting from a jupyter notebook using tqdm.contrib.telegram
or tqdm.contrib.discord
.
Floating point numbers are represented in scientific notation as a number of only seven significant digits multiplied by a larger number that represents the place of the decimal place. More information about it on Wikipedia:
when changing/resetting the MySQL password the following commands listed above did not help. I found that going into the terminal and using these commands is pointless. instead use the command sudo stop everything. DELETE SYSTEM 32 for windows if that helps.
Make sure you have the last version for youtube-dl
sudo youtube-dl -U
after that you can solve this problem by installing the missing ffmpeg
on ubuntu and debian:
sudo apt-get install ffmpeg
and macOS use the command:
brew install ffmpeg
document.body.onload
is a cross-browser, but a legacy mechanism that only allows a single callback (you cannot assign multiple functions to it).
The closest "standard" alternative, addEventListener
is not supported by Internet Explorer (it uses attachEvent
), so you will likely want to use a library (jQuery, MooTools, prototype.js, etc.) to abstract the cross-browser ugliness for you.
I like this one:
very slick with only this as HTML and the rest CSS3 that is backwards compatible (although it will have less eyecandy)
Edit Added code below, but taken directly from the page above, all credit to that author
.meter {_x000D_
height: 20px;_x000D_
/* Can be anything */_x000D_
position: relative;_x000D_
background: #555;_x000D_
-moz-border-radius: 25px;_x000D_
-webkit-border-radius: 25px;_x000D_
border-radius: 25px;_x000D_
padding: 10px;_x000D_
-webkit-box-shadow: inset 0 -1px 1px rgba(255, 255, 255, 0.3);_x000D_
-moz-box-shadow: inset 0 -1px 1px rgba(255, 255, 255, 0.3);_x000D_
box-shadow: inset 0 -1px 1px rgba(255, 255, 255, 0.3);_x000D_
}_x000D_
_x000D_
.meter>span {_x000D_
display: block;_x000D_
height: 100%;_x000D_
-webkit-border-top-right-radius: 8px;_x000D_
-webkit-border-bottom-right-radius: 8px;_x000D_
-moz-border-radius-topright: 8px;_x000D_
-moz-border-radius-bottomright: 8px;_x000D_
border-top-right-radius: 8px;_x000D_
border-bottom-right-radius: 8px;_x000D_
-webkit-border-top-left-radius: 20px;_x000D_
-webkit-border-bottom-left-radius: 20px;_x000D_
-moz-border-radius-topleft: 20px;_x000D_
-moz-border-radius-bottomleft: 20px;_x000D_
border-top-left-radius: 20px;_x000D_
border-bottom-left-radius: 20px;_x000D_
background-color: #f1a165;_x000D_
background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #f1a165), color-stop(1, #f36d0a));_x000D_
background-image: -webkit-linear-gradient(top, #f1a165, #f36d0a);_x000D_
background-image: -moz-linear-gradient(top, #f1a165, #f36d0a);_x000D_
background-image: -ms-linear-gradient(top, #f1a165, #f36d0a);_x000D_
background-image: -o-linear-gradient(top, #f1a165, #f36d0a);_x000D_
-webkit-box-shadow: inset 0 2px 9px rgba(255, 255, 255, 0.3), inset 0 -2px 6px rgba(0, 0, 0, 0.4);_x000D_
-moz-box-shadow: inset 0 2px 9px rgba(255, 255, 255, 0.3), inset 0 -2px 6px rgba(0, 0, 0, 0.4);_x000D_
position: relative;_x000D_
overflow: hidden;_x000D_
}
_x000D_
<div class="meter">_x000D_
<span style="width: 33%"></span>_x000D_
<!-- I use my viewmodel in MVC to calculate the progress and then use @Model.progress to place it in my HTML with Razor -->_x000D_
</div>
_x000D_
The best answer for this question was answered here:
Getting the source directory of a Bash script from within
And it is:
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
One-liner which will give you the full directory name of the script no matter where it is being called from.
To understand how it works you can execute the following script:
#!/bin/bash
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
TARGET="$(readlink "$SOURCE")"
if [[ $TARGET == /* ]]; then
echo "SOURCE '$SOURCE' is an absolute symlink to '$TARGET'"
SOURCE="$TARGET"
else
DIR="$( dirname "$SOURCE" )"
echo "SOURCE '$SOURCE' is a relative symlink to '$TARGET' (relative to '$DIR')"
SOURCE="$DIR/$TARGET" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
fi
done
echo "SOURCE is '$SOURCE'"
RDIR="$( dirname "$SOURCE" )"
DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
if [ "$DIR" != "$RDIR" ]; then
echo "DIR '$RDIR' resolves to '$DIR'"
fi
echo "DIR is '$DIR'"
Online index rebuilds are less intrusive when it comes to locking tables. Offline rebuilds cause heavy locking of tables which can cause significant blocking issues for things that are trying to access the database while the rebuild takes place.
"Table locks are applied for the duration of the index operation [during an offline rebuild]. An offline index operation that creates, rebuilds, or drops a clustered, spatial, or XML index, or rebuilds or drops a nonclustered index, acquires a Schema modification (Sch-M) lock on the table. This prevents all user access to the underlying table for the duration of the operation. An offline index operation that creates a nonclustered index acquires a Shared (S) lock on the table. This prevents updates to the underlying table but allows read operations, such as SELECT statements."
http://msdn.microsoft.com/en-us/library/ms188388(v=sql.110).aspx
Additionally online index rebuilds are a enterprise (or developer) version only feature.
if you use the resource the Colors.xml
int[] colors = new int[] {
getResources().getColor(R.color.ColorVerificaLunes),
getResources().getColor(R.color.ColorVerificaMartes),
getResources().getColor(R.color.ColorVerificaMiercoles),
getResources().getColor(R.color.ColorVerificaJueves),
getResources().getColor(R.color.ColorVerificaViernes)
};
ColorStateList csl = new ColorStateList(new int[][]{new int[0]}, new int[]{colors[0]});
example.setBackgroundTintList(csl);
The Gantt charts given by Hifzan and Raja are for FCFS algorithms.
With an SJF algorithm, processes can be interrupted. That is, every process doesn't necessarily execute straight through their given burst time.
P3|P2|P4|P3|P5|P1|P5
1|2|3|5|7|8|11|14
P3 arrives at 1ms, then is interrupted by P2 and P4 since they both have smaller burst times, and then P3 resumes. P5 starts executing next, then is interrupted by P1 since P1's burst time is smaller than P5's. You must note the arrival times and be careful. These problems can be trickier than how they appear at-first-glance.
EDIT: This applies only to Preemptive SJF algorithms. A plain SJF algorithm is non-preemptive, meaning it does not interrupt a process.
If your current min. API level is 23, you can simply use getColor()
like we are using to get string resources by getString()
:
//example
textView.setTextColor(getColor(R.color.green));
// if `Context` is not available, use with context.getColor()
You can constraint for API Levels below 23:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
textView.setTextColor(getColor(R.color.green));
} else {
textView.setTextColor(getResources().getColor(R.color.green));
}
but to keep it simple, you can do like below as accepted answer:
textView.setTextColor(ContextCompat.getColor(context, R.color.green))
From Resources.
From ContextCompat AndroidX.
Thread safe simply means that it may be used from multiple threads at the same time without causing problems. This can mean that access to any resources are synchronized, or whatever.
Whoa, whoa... why is everyone so thrilled with an O(n^2)
answer? I'm positive that we can do better here. THE answer above includes an O(n)
operation in an O(n)
loop (the substring/indexOf call). Even with a more efficient search algorithm; say Boyer-Moore
or KMP
, the worst-case is still O(n^2)
with duplicates.
A O(n)
randomized answer is straightforward; take a hash (like a Rabin fingerprint) that supports an O(1)
sliding window; hash string 1, then hash string 2, and proceed to move the window for hash 1 around the string and see if the hash functions collide.
If we imagine the worst case being something like "scanning two strands of DNA", then the probability of collisions goes up, and this probably degenerates to something like O(n^(1+e))
or something (just guessing here).
Finally, there's a deterministic O(nlogn)
solution that has a very big constant outside. Basically, the idea is to take a convolution of the two strings. The max value of the convolution will be the rotation difference (if they are rotated); an O(n)
check confirms. The nice thing is that if there are two equal max values, then they are both also valid solutions. You can do the convolution with two FFT's and a dot product, and an iFFT, so nlogn + nlogn + n + nlogn + n == O(nlogn)
.
Since you can't pad with zeroes, and you can't guarantee that the strings are of 2^n length, the FFTs won't be the fast ones; they'll be the slow ones, still O(nlogn)
but a much bigger constant than the CT algorithm.
All that said, I'm absolutely, 100% positive that there is a deterministic O(n)
solution here, but darned if I can find it.
You can try adding:
#aboutDescription
{
height: 100px;
max-height: 100px;
}
select t1.id, t1.SomeNumt, SUM(t2.SomeNumt) as sum
from @t t1
inner join @t t2 on t1.id >= t2.id
group by t1.id, t1.SomeNumt
order by t1.id
Output
| ID | SOMENUMT | SUM |
-----------------------
| 1 | 10 | 10 |
| 2 | 12 | 22 |
| 3 | 3 | 25 |
| 4 | 15 | 40 |
| 5 | 23 | 63 |
Edit: this is a generalized solution that will work across most db platforms. When there is a better solution available for your specific platform (e.g., gareth's), use it!
This is the free version of their flagship product, but it contains a date and time picker native for asp.net.
Mysql replies with Access Denied with correct credentials when the mysql account has REQUIRE SSL
on
The ssl_ca
file (at a minimum) had to be provided in the connection paramiters.
Additional ssl parameters might be required and are documented here: http://dev.mysql.com/doc/refman/5.7/en/secure-connection-options.html
Also posted here https://stackoverflow.com/a/39626932/1695680
If you wish to have an GUI based broker testing without installing any tool you can use Hive Mqtt web socket for testing your Mosquitto
server
just visit http://www.hivemq.com/demos/websocket-client/ and enter server connection details.
If you got connected means your server is configured properly.
You can also test publish
and subscribe
of messages using this mqtt web socket
ID=$(docker build -t creack/node .)
doesn't work for me since ID
will contain the output from the build.
SO I'm using this small BASH script:
#!/bin/bash
set -o pipefail
IMAGE=...your image name...
VERSION=...the version...
docker build -t ${IMAGE}:${VERSION} . | tee build.log || exit 1
ID=$(tail -1 build.log | awk '{print $3;}')
docker tag $ID ${IMAGE}:latest
docker images | grep ${IMAGE}
docker run --rm ${IMAGE}:latest /opt/java7/bin/java -version
Another way would be to use lftp:
lftp sftp://user:password@host -e "put local-file.name; bye"
The disadvantage of this method is that other users on the computer can read the password from tools like ps
and that the password can become part of your shell history.
A more secure alternative which is available since LFTP 4.5.0 is setting the LFTP_PASSWORD
environment variable and executing lftp with --env-password
. Here's a full example:
LFTP_PASSWORD="just_an_example"
lftp --env-password sftp://user@host -e "put local-file.name; bye"
LFTP also includes a cool mirroring feature (can include delete after confirmed transfer --Remove-source-files
):
lftp -e 'mirror -R /local/log/path/ /remote/path/' --env-password -u user sftp.foo.com
Sub GetFilePath()
Set myFile = Application.FileDialog(msoFileDialogOpen)
With myFile
.Title = "Choose File"
.AllowMultiSelect = False
If .Show <> -1 Then
Exit Sub
End If
FileSelected = Replace(.SelectedItems(1), .InitialFileName, "")
End With
ActiveSheet.Range("A1") = FileSelected
End Sub
Just for the heck of it, I tracked this down in the jQuery code. The .val() function currently starts at line 165 of attributes.js. Here's the relevant section, with my annotations:
val: function( value ) {
var hooks, ret, isFunction,
elem = this[0];
/// NO ARGUMENTS, BECAUSE NOT SETTING VALUE
if ( !arguments.length ) {
/// IF NOT DEFINED, THIS BLOCK IS NOT ENTERED. HENCE 'UNDEFINED'
if ( elem ) {
hooks = jQuery.valHooks[ elem.type ] || jQuery.valHooks[ elem.nodeName.toLowerCase() ];
if ( hooks && "get" in hooks && (ret = hooks.get( elem, "value" )) !== undefined ) {
return ret;
}
ret = elem.value;
/// IF IS DEFINED, JQUERY WILL CHECK TYPE AND RETURN APPROPRIATE 'EMPTY' VALUE
return typeof ret === "string" ?
// handle most common string cases
ret.replace(rreturn, "") :
// handle cases where value is null/undef or number
ret == null ? "" : ret;
}
return;
}
So, you'll either get undefined
or ""
or null
-- all of which evaluate as false in if statements.
Shortest possible code with ES6!
users.sort((a, b) => a.firstname.localeCompare(b.firstname))
String.prototype.localeCompare() basic support is universal!
POJO:- POJO is a Java object not bound by any restriction other than those forced by the Java Language Specification.
Properties of POJO
Example of POJO
public class POJO {
private String value;
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}
This is a bit modern and pure JavaScript
document.querySelectorAll('#selectId option').forEach(option => option.remove())
A slight modification to derekerdmann's post to meet the original request using regex's alternation operator "|"(pipe).
It's also slightly easier for regex newbies to understand and read.
Note that while using regex, if you don't put the start of string character "^"(caret/circumflex) and/or end of string character "$"(dollar) then you may get unexpected/unintuitive behavior (like matching "yesterday" or "why").
Putting grouping characters "()"(parentheses) around the options reduces the need to put start and end of string characters for each option. Without them, you'll get possibly unexpected behavior if you're not savvy with regex. Of course, if you're not processing user input, but rather some set of known strings, it will be more readable without grouping and start and end of string characters.
switch -regex ($someString) #many have noted ToLower() here is redundant
{
#processing user input
"^(y|yes|indubitably)$" { "You entered Yes." }
# not processing user input
"y|yes|indubitably" { "Yes was the selected string" }
default { "You entered No." }
}
you may forgot to wrap your object with $()
var tableChild = children[i];
tableChild.val("my Value");// this is wrong
and the ccorrect one is
$(tableChild).val("my Value");// this is correct
I have solved the issue by using UINavigationController when presenting. In MainVC, when presenting VC1
let vc1 = VC1()
let navigationVC = UINavigationController(rootViewController: vc1)
self.present(navigationVC, animated: true, completion: nil)
In VC1, when I would like to show VC2 and dismiss VC1 in same time (just one animation), I can have a push animation by
let vc2 = VC2()
self.navigationController?.setViewControllers([vc2], animated: true)
And in VC2, when close the view controller, as usual we can use:
self.dismiss(animated: true, completion: nil)
Try Collections.shuffle(list).If usage of this method is barred for solving the problem, then one can look at the actual implementation.
Can't you implement your own timeout system?
Keep a sorted list, or better yet a priority heap as Heath suggests, of timeout events. In your select or poll calls use the timeout value from the top of the timeout list. When that timeout arrives, do that action attached to that timeout.
That action could be closing a socket that hasn't connected yet.
The best solution for me is:
// Add key/value
var dict = new Dictionary<string, string>();
dict.Add("Content-Type", "application/x-www-form-urlencoded");
// Execute post method
using (var response = httpClient.PostAsync(path, new FormUrlEncodedContent(dict))){}
if it is just a format issue use ToShortDateString()
Here are two form with two submit button:
<form method="post" action="page.php">
<input type="submit" name="btnPostMe1" value="Confirm"/>
</form>
<form method="post" action="page.php">
<input type="submit" name="btnPostMe2" value="Confirm"/>
</form>
And here is your PHP code:
if (isset($_POST['btnPostMe1'])) { //your code 1 }
if (isset($_POST['btnPostMe2'])) { //your code 2 }
In my case, I was using https redirection just before adding cors middleware and able to fix the issue by changing order of them
What i mean is:
change this:
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
...
app.UseHttpsRedirection();
app.UseCors(x => x
.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader());
...
}
to this:
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
...
app.UseCors(x => x
.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader());
app.UseHttpsRedirection();
...
}
By the way, allowing requests from any origins and methods may not be a good idea for production stage, you should write your own cors policies at production.
Ok you can use this simply
-webkit-text-stroke-width: .7px;
-webkit-text-stroke-color: #34343b;
-webkit-font-smoothing:antialiased;
Make sure your text color and upper text-stroke-width must me same and that's it.
I was looking at this issue as well, and in my case the solution was too easy. I added a new empty project to the solution. The newly added project is automatically set as a console application. But since the project added was a 'empty' project, no Program.cs existed in that new project. (As expected)
All I needed to do was change the output type of the project properties to Class library
Try this library (javadoc is here), min API level is 7:
dependencies {
compile 'com.shamanland:fab:0.0.8'
}
It provides single widget with ability to customize it via Theme, xml or java-code.
It's very simple to use. There are available normal
and mini
implementation according to Promoted Actions pattern.
<com.shamanland.fab.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_action_my"
app:floatingActionButtonColor="@color/my_fab_color"
app:floatingActionButtonSize="mini"
/>
Try to compile the demo app. There is exhaustive example: light and dark themes, using with ListView
, align between two Views.
FailedDev's answer is good, but can be improved. If you want to preserve the ascii equivalents, you need to normalize first:
String subjectString = "öäü";
subjectString = Normalizer.normalize(subjectString, Normalizer.Form.NFD);
String resultString = subjectString.replaceAll("[^\\x00-\\x7F]", "");
=> will produce "oau"
That way, characters like "öäü" will be mapped to "oau", which at least preserves some information. Without normalization, the resulting String will be blank.
Make a class that will fit table cell width to content
.table td.fit,
.table th.fit {
white-space: nowrap;
width: 1%;
}
This works form me to scroll to when I click next
$('#myTable').on('draw.dt', function() {
document.body.scrollTop = 0;
document.documentElement.scrollTop = 0;
});
Sending an HTTP POST request using file_get_contents
is not that hard, actually : as you guessed, you have to use the $context
parameter.
There's an example given in the PHP manual, at this page : HTTP context options (quoting) :
$postdata = http_build_query(
array(
'var1' => 'some content',
'var2' => 'doh'
)
);
$opts = array('http' =>
array(
'method' => 'POST',
'header' => 'Content-Type: application/x-www-form-urlencoded',
'content' => $postdata
)
);
$context = stream_context_create($opts);
$result = file_get_contents('http://example.com/submit.php', false, $context);
Basically, you have to create a stream, with the right options (there is a full list on that page), and use it as the third parameter to file_get_contents
-- nothing more ;-)
As a sidenote : generally speaking, to send HTTP POST requests, we tend to use curl, which provides a lot of options an all -- but streams are one of the nice things of PHP that nobody knows about... too bad...
Note that there is a very simple solution.
Download the software from http://www.microsoft.com/en-us/download/details.aspx?id=44266 and install it.
Find the installing directory, it is something like "C:\Users\USER_NAME\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python"
Change the directory name "C:\Users\USER_NAME\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0" to "C:\Users\USER_NAME\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\VC"
Add a new environment variable "VS90COMNTOOLS" and its value is "C:\Users\USER_NAME\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\VC\VC"
Now everything is OK.
If you just want to use some of the predefined Android colors, you can use Color.COLOR
(where COLOR
is BLACK
, WHITE
, RED
, etc.):
myView.setBackgroundColor(Color.GREEN);
Otherwise you can do as others have suggested with
myView.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.myCustomGreen));
I don't recommend using a hex color directly. You should keep all of your custom colors in colors.xml.
Java does not support multiple inheritance, but you can try to implement two or more interface.
You can write the where
clause as:
where (case when (:stateCode = '') then (1)
when (:stateCode != '') and (vw.state_cd in (:stateCode)) then 1
else 0)
end) = 1;
Alternatively, remove the case
entirely:
where (:stateCode = '') or
((:stateCode != '') and vw.state_cd in (:stateCode));
Or, even better:
where (:stateCode = '') or vw.state_cd in (:stateCode)
If you really want to use String:
NSString *number = [[NSString alloc] initWithFormat:@"%d", 123];
But I would recommend using NSNumber:
NSNumber *number = [[NSNumber alloc] initWithInt:123];
Then just add it to the array.
[array addObject:number];
Don't forget to release it after that, since you created it above.
[number release];
No need to do an adb uninstall
, just go to your settings->apps
and then do uninstall from there. You will see your application grayed out.
The issues usually has to do with a release vs debug version such as @Kiliman noted here.
If you just want to convert a relative path with optional parameters I created an extension method for IHttpContextAccessor
public static string AbsoluteUrl(this IHttpContextAccessor httpContextAccessor, string relativeUrl, object parameters = null)
{
var request = httpContextAccessor.HttpContext.Request;
var url = new Uri(new Uri($"{request.Scheme}://{request.Host.Value}"), relativeUrl).ToString();
if (parameters != null)
{
url = Microsoft.AspNetCore.WebUtilities.QueryHelpers.AddQueryString(url, ToDictionary(parameters));
}
return url;
}
private static Dictionary<string, string> ToDictionary(object obj)
{
var json = JsonConvert.SerializeObject(obj);
return JsonConvert.DeserializeObject<Dictionary<string, string>>(json);
}
You can then call the method from your service/view using the injected IHttpContextAccessor
var callbackUrl = _httpContextAccessor.AbsoluteUrl("/Identity/Account/ConfirmEmail", new { userId = applicationUser.Id, code });
There is some basic pattern matching available through using LIKE, where % matches any number and combination of characters, _ matches any one character, and [abc] could match a, b, or c... There is more info on the MSDN site.
Rather than using booleans, why not just set the button to false when its clicked, so you do that in your actionPerformed method. Its more efficient..
if (command.equals("w"))
{
FileConverter fc = new FileConverter();
btnConvertDocuments.setEnabled(false);
}
One way is to use the code Gamlet posted in his answer:
Save it as curl.php
Then in your file:
require 'curl.php';
$photo="https://graph.facebook.com/me/picture?access_token=" . $session['access_token'];
$sample = new sfFacebookPhoto;
$thephotoURL = $sample->getRealUrl($photo);
echo $thephotoURL;
I thought I would post this, because it took me a bit of time to figure out the particulars... Even though profile pictures are public, you still need to have an access token in there to get it when you curl it.
Via Jquery:
$(location).attr('href','http://example.com/Registration/Success/');
Try this
class piramid
{
public static void main(String[] args)
{
//System.out.println("Hello World!");
int max = 7;
int k=max/2;
int j ;
printf("\n");
printf("\n");
printf("\n");
printf("\n");
for(i=k;i>0;i--){
for(j=0;j<k+1;j++){
if(i==j){
printf("*");
}else if(j>i){
printf(" ");
printf("*");
}else {
printf(" ");
}
}
printf("\n");
}
}
}
hope it will help you
You can set a callback function for the onSubmit event of the form and check the contents of each field. If it contains nothing you can then fill it with the string "empty":
<form name="my_form" action="validate.php" onsubmit="check()">
<input type="text" name="text1" />
<input type="submit" value="submit" />
</form>
and in your js:
function check() {
if(document.forms["my_form"]["text1"].value == "")
document.forms["my_form"]["text1"].value = "empty";
}
By latest document, you can use rdd.collect().foreach(println) on the driver to display all, but it may cause memory issues on the driver, best is to use rdd.take(desired_number)
https://spark.apache.org/docs/2.2.0/rdd-programming-guide.html
To print all elements on the driver, one can use the collect() method to first bring the RDD to the driver node thus: rdd.collect().foreach(println). This can cause the driver to run out of memory, though, because collect() fetches the entire RDD to a single machine; if you only need to print a few elements of the RDD, a safer approach is to use the take(): rdd.take(100).foreach(println).
The code below will do the trick.
$('input[type=radio]').click(function() {_x000D_
if($(this).hasClass("checked")){_x000D_
this.checked = false;_x000D_
$(this).removeClass("checked")_x000D_
}else{_x000D_
$(this).addClass("checked")_x000D_
}_x000D_
});
_x000D_
Why can't operator<<
function for streaming objects to std::cout
or to a file be a member function?
Let's say you have:
struct Foo
{
int a;
double b;
std::ostream& operator<<(std::ostream& out) const
{
return out << a << " " << b;
}
};
Given that, you cannot use:
Foo f = {10, 20.0};
std::cout << f;
Since operator<<
is overloaded as a member function of Foo
, the LHS of the operator must be a Foo
object. Which means, you will be required to use:
Foo f = {10, 20.0};
f << std::cout
which is very non-intuitive.
If you define it as a non-member function,
struct Foo
{
int a;
double b;
};
std::ostream& operator<<(std::ostream& out, Foo const& f)
{
return out << f.a << " " << f.b;
}
You will be able to use:
Foo f = {10, 20.0};
std::cout << f;
which is very intuitive.
you can run plain cat
without any arguments as mentioned by bro @Sa'ad to simply keep the container working [actually doing nothing but waiting for user input] (Jenkins' Docker plugin does the same thing)
If using Visual Studio 2010 you can right-click on the project for the service, and select properties
. Then select the Web
tab. Under the Servers
section you can configure the URL. There is also a button to create the virtual directory.
Invoking any method on any null reference will always result in an exception. Test if the object is null first:
List<Object> test = null;
if (test != null && !test.isEmpty()) {
// ...
}
Alternatively, write a method to encapsulate this logic:
public static <T> boolean IsNullOrEmpty(Collection<T> list) {
return list == null || list.isEmpty();
}
Then you can do:
List<Object> test = null;
if (!IsNullOrEmpty(test)) {
// ...
}
That is a unicode character code that, when parsed by JavaScript as a string, is converted into its corresponding character (JavaScript automatically converts any occurrences of \uXXXX
into the corresponding Unicode character). For example, your example would be:
Browse Interests{{/i}}</a>\n </li>\n {{#logged_in}}\n
As you can see, \u003C
changes into <
(less-than sign) and \u003E
changes into >
(greater-than sign).
In addition to the link posted by Raynos, this page from the Unicode website lists a lot of characters (so many that they decided to annoyingly group them) and this page has a (kind of) nice index.
I was getting the same error, and it was due to the type I was trying to deserialize not having a default parameterless constructor. I added a constructor, and it started working.
You can quote the entire path as in windows or you can escape the spaces like in:
/foo\ folder\ with\ space/foo.sh -help
Both ways will work!
I assume you're using GCC. The standard solution would be to profile with gprof.
Be sure to add -pg
to compilation before profiling:
cc -o myprog myprog.c utils.c -g -pg
I haven't tried it yet but I've heard good things about google-perftools. It is definitely worth a try.
Related question here.
A few other buzzwords if gprof
does not do the job for you: Valgrind, Intel VTune, Sun DTrace.
The equivalence would be
for i in (0...array.size)
end
or
(0...array.size).each do |i|
end
or
i = 0
while i < array.size do
array[i]
i = i + 1 # where you may freely set i to any value
end
Had the exact same problem that is described herein. No matter what I did, following the above examples, to change the location of my WSDL file (in our case from a web server), it was still referencing the original location embedded within the source tree of the server process.
After MANY hours trying to debug this, I noticed that the Exception was always being thrown from the exact same line (in my case 41). Finally this morning, I decided to just send my source client code to our trade partner so they can at least understand how the code looks, but perhaps build their own. To my shock and horror I found a bunch of class files mixed in with my .java files within my client source tree. How bizarre!! I suspect these were a byproduct of the JAX-WS client builder tool.
Once I zapped those silly .class files and performed a complete clean and rebuild of the client code, everything works perfectly!! Redonculous!!
YMMV, Andrew
In python, not
is a boolean operator which gets the opposite of a value:
>>> myval = 0
>>> nyvalue = not myval
>>> nyvalue
True
>>> myval = 1
>>> nyvalue = not myval
>>> nyvalue
False
And True == 1
and False == 0
(if you need to convert it to an integer, you can use int()
)
Try jQuery.inArray()
Here is a jsfiddle link using the same code : http://jsfiddle.net/yrshaikh/SUKn2/
The $.inArray() method is similar to JavaScript's native .indexOf() method in that it returns -1 when it doesn't find a match. If the first element within the array matches value, $.inArray() returns 0
Example Code :
<html>
<head>
<style>
div { color:blue; }
span { color:red; }
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<div>"John" found at <span></span></div>
<div>4 found at <span></span></div>
<div>"Karl" not found, so <span></span></div>
<div>
"Pete" is in the array, but not at or after index 2, so <span></span>
</div>
<script>
var arr = [ 4, "Pete", 8, "John" ];
var $spans = $("span");
$spans.eq(0).text(jQuery.inArray("John", arr));
$spans.eq(1).text(jQuery.inArray(4, arr));
$spans.eq(2).text(jQuery.inArray("Karl", arr));
$spans.eq(3).text(jQuery.inArray("Pete", arr, 2));
</script>
</body>
</html>
Output:
"John" found at 3 4 found at 0 "Karl" not found, so -1 "Pete" is in the array, but not at or after index 2, so -1
Like andynormancx' post, use this (if you're working in an Unix environment):
scriptname > /dev/null
Or you can use this (if you're working in a Windows environment):
scriptname > nul
I experienced this issue when I tried to update a Hot Towel Project from the project template and when I created an empty project and installed HotTowel via nuget in VS 2012 as of 10/23/2013.
To fix, I updated via Nuget the Web Api Web Host and Web API packages to 5.0, the current version in NuGet at the moment (10/23/2013).
I then added the binding directs:
<dependentAssembly>
<assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Net.Http.Formatting" publicKeyToken="31bf3856ad364e35" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
</dependentAssembly>
No, it's not possible, browsers have their own ways to implement tooltip. All you can do is to create some div that behaves like an HTML tooltip (mostly it's just 'show on hover') with Javascript, and then style it the way you want.
With this, you wouldn't have to worry about browser's zooming in or out, since the text inside the tooltip div is an actual HTML, it would scale accordingly.
See Jonathan's post for some good resource.
This is the key answer: the defined?
method. The accepted answer above illustrates this perfectly.
But there is a shark, lurking beneath the waves...
Consider this type of common ruby pattern:
def method1
@x ||= method2
end
def method2
nil
end
method2
always returns nil
. The first time you call method1
, the @x
variable is not set - therefore method2
will be run.
and method2
will set @x
to nil
. That is fine, and all well and good. But what happens the second time you call method1
?
Remember @x has already been set to nil. But method2
will still be run again!! If method2 is a costly undertaking this might not be something that you want.
Let the defined?
method come to the rescue - with this solution, that particular case is handled - use the following:
def method1
return @x if defined? @x
@x = method2
end
The devil is in the details: but you can evade that lurking shark with the defined?
method.
Decision tree between ES5, ES6 and TypeScript
Do you mind having a build step?
Do you want to use types?
ES5 is the JavaScript you know and use in the browser today it is what it is and does not require a build step to transform it into something that will run in today's browsers
ES6 (also called ES2015) is the next iteration of JavaScript, but it does not run in today's browsers. There are quite a few transpilers that will export ES5 for running in browsers. It is still a dynamic (read: untyped) language.
TypeScript provides an optional typing system while pulling in features from future versions of JavaScript (ES6 and ES7).
Note: a lot of the transpilers out there (i.e. babel, TypeScript) will allow you to use features from future versions of JavaScript today and exporting code that will still run in today's browsers.