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Mapping two integers to one, in a unique and deterministic way
Imagine two positive integers A and B. I want to combine these two into a single integer C.
18 Answers
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Formula to determine brightness of RGB color
I'm looking for some kind of formula or algorithm to determine the brightness of a color given the RGB values. I know it can't be as simple as adding the RGB values together and having higher sums be brighter, but I'm kind of at a loss as to where to start.
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Pandas groupby: How to get a union of strings
I have a dataframe like this:
8 Answers
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Why `null >= 0 && null
I had to write a routine that increments the value of a variable by 1 if its type is number and assigns 0 to the variable if not, where the variable is initially null or undefined .
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How to drop rows of Pandas DataFrame whose value in a certain column is NaN
I have this DataFrame and want only the records whose EPS column is not NaN :
12 Answers
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Simplest way to profile a PHP script
What's the easiest way to profile a PHP script?
13 Answers
13
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Pandas index column title or name
How do I get the index column name in python pandas? Here's an example dataframe:
9 Answers
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Should I return EXIT_SUCCESS or 0 from main()?
It's a simple question, but I keep seeing conflicting answers: should the main routine of a C++ program return 0 or EXIT_SUCCESS ?
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What does {0} mean when initializing an object?
When {0} is used to initialize an object, what does it mean? I can't find any references to {0} anywhere, and because of the curly braces Google searches are not helpful.
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Double vs. BigDecimal?
I have to calculate some floating point variables and my colleague suggest me to use BigDecimal instead of double since it will be more precise. But I want to know what it is and how to make most out of BigDecimal ?
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