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How can I get the behavior of GNU's readlink -f on a Mac?
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+200
readli...
Which iOS app version/build number(s) MUST be incremented upon App Store release?
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Reverse a string in Python
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How about:
>>> 'hello world'[::-1]
'dlrow olleh'
This is extended slice syntax. It works by doing [begin:end:step] - by leaving begin and end off and specifying a step of -1, it reverses a string.
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Lambda function in list comprehensions
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271
The first one creates a single lambda function and calls it ten times.
The second one doesn't ca...
Get the index of the nth occurrence of a string?
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Can hash tables really be O(1)?
It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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How to create NS_OPTIONS-style bitmask enumerations in Swift?
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Best way to find if an item is in a JavaScript array? [duplicate]
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As of ECMAScript 2016 you can use includes()
arr.includes(obj);
If you want to support IE or other older browsers:
function include(arr,obj) {
return (arr.indexOf(obj) != -1);
}
EDIT:
This will not work on IE6, 7 or 8 though. The bes...