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Returning multiple values from a C++ function
Is there a preferred way to return multiple values from a C++ function? For example, imagine a function that divides two integers and returns both the quotient and the remainder. One way I commonly see is to use reference parameters:
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Is it possible to await an event instead of another async method?
...lease();
// wait for signal somewhere else
await signal.WaitAsync();
Alternatively, you can use an instance of the TaskCompletionSource<T> Class to create a Task<T> that represents the result of the button click:
private TaskCompletionSource<bool> tcs = new TaskCompletionSour...
Can I have an onclick effect in CSS?
...mouseUp) is to use the checkbox hack. It works by attaching a label to an <input type="checkbox"> element via the label's for="" attribute.
This feature has broad browser support (the :checked pseudo-class is IE9+).
Apply the same value to an <input>'s ID attribute and an accompanying &l...
How to change the status bar color in Android?
.../styles.xml file per androiddocs.com/training/material/theme.html like so <item name="android:statusBarColor">@color/primary_color</item>
– JL West
Dec 17 '18 at 15:33
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What's the difference between jQuery's replaceWith() and html()?
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Take this HTML code:
<div id="mydiv">Hello World</div>
Doing:
$('#mydiv').html('Aloha World');
Will result in:
<div id="mydiv">Aloha World</div>
Doing:
$('#mydiv').replaceWith('Aloha World');
Will result in:
Alo...
Django optional url parameters
... approaches.
One is to use a non-capturing group in the regex: (?:/(?P<title>[a-zA-Z]+)/)?
Making a Regex Django URL Token Optional
Another, easier to follow way is to have multiple rules that matches your needs, all pointing to the same view.
urlpatterns = patterns('',
url(r'^projec...
Spring 3 RequestMapping: Get path value
... foo( @PathVariable String id, HttpServletRequest request ) {
String urlTail = new AntPathMatcher()
.extractPathWithinPattern( "/{id}/**", request.getRequestURI() );
}
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Vertically centering a div inside another div [duplicate]
... example
Tested in:
FF3.5+
FF4+
Safari 5+
Chrome 11+
IE9+
HTML
<div class="cn"><div class="inner">your content</div></div>
CSS
.cn {
display: table-cell;
width: 500px;
height: 500px;
vertical-align: middle;
text-align: center;
}
.inner {
display: in...
When should I use the HashSet type?
I am exploring the HashSet<T> type, but I don't understand where it stands in collections.
11 Answers
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POST unchecked HTML checkboxes
I've got a load of checkboxes that are checked by default. My users will probably uncheck a few (if any) of the checkboxes and leave the rest checked.
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