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Is there an “exists” function for jQuery?
..., and for numbers 0 means false, everything else true. So you could write:
if ($(selector).length)
You don't need that >0 part.
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How do I check whether a file exists without exceptions?
How do I check if a file exists or not, without using the try statement?
39 Answers
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Python: Get relative path from comparing two absolute paths
Say, I have two absolute paths. I need to check if the location referring to by one of the paths is a descendant of the other. If true, I need to find out the relative path of the descendant from the ancestor. What's a good way to implement this in Python? Any library that I can benefit from?
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Make git automatically remove trailing whitespace before committing
...sing git with my team and would like to remove whitespace changes from my diffs, logs, merges, etc. I'm assuming that the easiest way to do this would be for git to automatically remove trailing whitespace (and other whitespace errors) from all commits as they are applied.
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What is the most efficient way of finding all the factors of a number in Python?
...st.__add__,
([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0)))
This will return all of the factors, very quickly, of a number n.
Why square root as the upper limit?
sqrt(x) * sqrt(x) = x. So if the two factors are the same, they're both the square root. If you make o...
How to compare if two structs, slices or maps are equal?
I want to check if two structs, slices and maps are equal.
5 Answers
5
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Case insensitive comparison NSString
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if( [@"Some String" caseInsensitiveCompare:@"some string"] == NSOrderedSame ) {
// strings are equal except for possibly case
}
The documentation is located at Search and Comparison Methods
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How to check if anonymous object has a method?
How can I check if an anonymous object that was created as such:
6 Answers
6
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Will strlen be calculated multiple times if used in a loop condition?
I'm not sure if the following code can cause redundant calculations, or is it compiler-specific?
18 Answers
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How to check if an element does NOT have a specific class?
How do I check if there isn't a class. For example, I know how to check to see if it has the class "test", but how do I check to see if it doesn't have the class "test"?
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