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Meaning of “[: too many arguments” error from if [] (square brackets)
...ightforward resource spelling out the meaning of and fix for the following BASH shell error, so I'm posting what I found after researching it.
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What is this weird colon-member (“ : ”) syntax in the constructor?
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It's a member initialization list. You should find information about it in any good C++ book.
You should, in most cases, initialize all member objects in the member initialization list (however, do note the exceptions listed at the e...
Check if two linked lists merge. If so, where?
This question may be old, but I couldn't think of an answer.
26 Answers
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Convert a list of characters into a string
... empty string to join all of the strings together with the empty string in between, like so:
>>> a = ['a', 'b', 'c', 'd']
>>> ''.join(a)
'abcd'
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Why does Popen.communicate() return b'hi\n' instead of 'hi'?
...an someone explain why the result I want, "hi", is preceded with a letter 'b' and followed with a newline?
4 Answers
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Run an OLS regression with Pandas Data Frame
I have a pandas data frame and I would like to able to predict the values of column A from the values in columns B and C. Here is a toy example:
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What is the best way to use a HashMap in C++?
I know that STL has a HashMap API, but I cannot find any good and thorough documentation with good examples regarding this.
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Is there a way to iterate over a range of integers?
Go's range can iterate over maps and slices, but I was wondering if there is a way to iterate over a range of numbers, something like this:
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Set operations (union, intersection) on Swift array?
Are there any standard library calls I can use to either perform set operations on two arrays, or implement such logic myself (ideally as functionally and also efficiently as possible)?
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Print commit message of a given commit in git
I need a plumbing command to print the commit message of one given commit - nothing more, nothing less.
6 Answers
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