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Operation on every pair of element in a list
Using Python, I'd like to compare every possible pair in a list.
4 Answers
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Why does (1 in [1,0] == True) evaluate to False?
When I was looking at answers to this question , I found I didn't understand my own answer.
1 Answer
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Java rounding up to an int using Math.ceil
...oes it still return 4? 157/32 = 4.90625 , I need to round up, I've looked around and this seems to be the right method.
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Can a pointer to base point to an array of derived objects?
I went to a job interview today and was given this interesting question.
3 Answers
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Returning value that was passed into a method
I have a method on an interface:
3 Answers
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Drop all duplicate rows across multiple columns in Python Pandas
The pandas drop_duplicates function is great for "uniquifying" a dataframe. However, one of the keyword arguments to pass is take_last=True or take_last=False , while I would like to drop all rows which are duplicates across a subset of columns. Is this possible?
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Should I use multiplication or division?
Here's a silly fun question:
25 Answers
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What does $$ mean in the shell?
I once read that one way to obtain a unique filename in a shell for temp files was to use a double dollar sign ( $$ ). This does produce a number that varies from time to time... but if you call it repeatedly, it returns the same number. (The solution is to just use the time.)
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How to print a list of symbols exported from a dynamic library
So I've been trying to get dynamic libraries to work in my XCode project under Mac OS X. So far no joy.
4 Answers
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How to combine multiple conditions to subset a data-frame using “OR”?
I have a data.frame in R. I want to try two different conditions on two different columns, but I want these conditions to be inclusive. Therefore, I would like to use "OR" to combine the conditions. I have used the following syntax before with lot of success when I wanted to use the "AND" conditio...