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How to raise a ValueError?
...s the largest index of a specific character in a string, however I would like it to raise a ValueError when the specified character does not occur in a string.
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How can I determine the current line number in JavaScript?
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var thisline = new Error().lineNumber
If that doesn't work in whatever environment you're using, you can try:
var stack = new Error().stack
Then hunt through the stack for the line number.
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PHP json_decode() returns NULL with valid JSON?
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It could be the encoding of the special characters. You could ask json_last_error() to get definite information.
Update: The issue is solved, look at the "Solution" paragraph in the question.
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how to return index of a sorted list? [duplicate]
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You can use the python sorting functions' key parameter to sort the index array instead.
>>> s = [2, 3, 1, 4, 5]
>>> sorted(range(len(s)), key=lambda k: s[k])
[2, 0, 1, 3, 4]
>>>
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Difference between Big-O and Little-O Notation
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f ∈ O(g) says, essentially
For at least one choice of a constant k > 0, you can find a constant a such that the inequality 0 <= f(x) <= k g(x) holds for all x > a.
Note that O(g) is the set of all functions for which this condition holds.
f ∈ o(g) says, essentially
Fo...
Get the client's IP address in socket.io
When using socket.IO in a Node.js server, is there an easy way to get the IP address of an incoming connection? I know you can get it from a standard HTTP connection, but socket.io is a bit of a different beast.
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Java equivalents of C# String.Format() and String.Join()
I know this is a bit of a newbie question, but are there equivalents to C#'s string operations in Java?
16 Answers
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Vim for Windows - What do I type to save and exit from a file?
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Press ESC to make sure you are out of the edit mode and then type:
:wq
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Using ls to list directories and their total sizes
...tal size of a sub-directory and all its contents as opposed to the usual 4K that (I assume) is just the directory file itself?
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How can we run a test method with multiple parameters in MSTest?
NUnit has a feature called Values, like below:
9 Answers
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