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How to properly check if std::function is empty in C++11?
I was wondering how to properly check if an std::function is empty. Consider this example:
3 Answers
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Using an if statement to check if a div is empty
I'm trying to remove a specific div if a separate div is empty. Here's what I'm using:
10 Answers
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Check if value is in select list with JQuery
How can I, using JQuery, check if a value belongs to dropdown list or not?
6 Answers
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Transposing a NumPy array
...ly as it's supposed to. The transpose of a 1D array is still a 1D array! (If you're used to matlab, it fundamentally doesn't have a concept of a 1D array. Matlab's "1D" arrays are 2D.)
If you want to turn your 1D vector into a 2D array and then transpose it, just slice it with np.newaxis (or None,...
How to Sort Multi-dimensional Array by Value?
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Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
function sortByOrder($a, $b) {
return $a['order'] - $b['order'];
}
usort($myArray, 'sortByOrder');
Starting in PHP 5.3, you can u...
Why doesn't list have safe “get” method like dictionary?
...ection (values are associated with names) where it is inefficient to check if a key is present (and return its value) without throwing an exception, while it is super trivial to avoid exceptions accessing list elements (as the len method is very fast). The .get method allows you to query the value ...
What does the 'b' character do in front of a string literal?
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@Gweebz - if you're actually typing out a string in a particular encoding instead of with unicode escapes (eg. b'\xff\xfe\xe12' instead of '\u32e1').
– detly
Jun 8 '11 at 2:44
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Twig ternary operator, Shorthand if-then-else
Does Twig support ternary (shorthand if-else) operator?
3 Answers
3
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Check if list contains any of another list
...practice - for all non-trivial list lengths the Intersect will be faster - if the lists are trivially short, it does not matter one way or another (in that case performance probably is not your concern at all anyway)
– BrokenGlass
Oct 20 '16 at 15:46
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Check for array not empty: any?
Is it bad to check if an array is not empty by using any? method?
6 Answers
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