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What's the _ underscore representative of in Swift References?
...
The underscore is a general token used to indicate a discarded value.
In this specific case, it means that the function will be invoked as runAction(argument) instead of runAction(action:argument)
In other contexts it has other similar meaning, e.g. i...
How do I use extern to share variables between source files?
...ler is informed that a
variable exists (and this is its type); it does not allocate the
storage for the variable at that point.
A variable is defined when the compiler allocates the storage for
the variable.
You may declare a variable multiple times (though once is sufficient);
you may only defin...
Accessing console and devtools of extension's background.js
... answered Jan 10 at 2:33
Token YiToken Yi
911 bronze badge
add ...
How to concatenate text from multiple rows into a single text string in SQL server?
...ppears to be part of the deal. You can workaround by replacing on an added token character. For example, this does a perfect comma-delimited list for any length: SELECT STUFF(REPLACE((SELECT '#!'+city AS 'data()' FROM #cityzip FOR XML PATH ('')),' #!',', '),1,2,'')
– NReilingh
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How to hide elements without having them take space on the page?
...ility: hidden
visibility:hidden means the tag is not visible, but space is allocated for it on the page.
display:none means completely hides elements with its space. (although you can still interact with it through the DOM)
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Bordered UITextView
...roundColor = [UIColor clearColor];
UIImageView *borderView = [[UIImageView alloc] initWithFrame: CGRectMake(0, 0, textView.frame.size.width, textView.frame.size.height)];
borderView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
UIImage *textFieldImage = [[UII...
Why should I avoid std::enable_if in function signatures
...enable_if contains a nested template or type definition (hint: look for :: tokens), then the resolution of these nested tempatles or types are usually a non-deduced context. Any substitution failure on such a non-deduced context is an error.
the various conditions in multiple enable_if overloads can...
Extending the User model with custom fields in Django
...e sites it makes more sense to use an email address as your identification token instead of a username.
[Ed: Two warnings and a notification follow, mentioning that this is pretty drastic.]
I would definitely stay away from changing the actual User class in your Django source tree and/or copying an...
How to tell if a tag failed to load
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@Rudey Uncaught SyntaxError: Unexpected token '<' (in latest Chrome)
– daleyjem
Feb 29 at 5:25
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ReactJS: Modeling Bi-Directional Infinite Scrolling
...ay of all children. Since we do not render them, it's really cheap to just allocate them and discard them. If 10k allocations is too big, you can instead pass a function that takes a range and return the elements.
<List>
{thousandelements.map(function() { return <Element /> })}
</L...