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Modifying a subset of rows in a pandas dataframe
Assume I have a pandas DataFrame with two columns, A and B. I'd like to modify this DataFrame (or create a copy) so that B is always NaN whenever A is 0. How would I achieve that?
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Version number comparison in Python
I want to write a cmp -like function which compares two version numbers and returns -1 , 0 , or 1 based on their compared valuses.
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PHP date() format when inserting into datetime in MySQL
What is the correct format to pass to the date() function in PHP if I want to insert the result into a MySQL datetime type column?
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Find a value in an array of objects in Javascript [duplicate]
I know similar questions have been asked before, but this one is a little different. I have an array of unnamed objects, which contain an array of named objects, and I need to get the object where "name" is "string 1". Here is an example array.
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Catching java.lang.OutOfMemoryError?
Documentation for java.lang.Error says:
14 Answers
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How to write a multidimensional array to a text file?
In another question, other users offered some help if I could supply the array I was having trouble with. However, I even fail at a basic I/O task, such as writing an array to a file.
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Is MATLAB OOP slow or am I doing something wrong?
I'm experimenting with MATLAB OOP , as a start I mimicked my C++'s Logger classes and I'm putting all my string helper functions in a String class, thinking it would be great to be able to do things like a + b , a == b , a.find( b ) instead
of strcat( a b ) , strcmp( a, b ) , retrieve first...
How to convert date to timestamp in PHP?
How do I get timestamp from e.g. 22-09-2008 ?
19 Answers
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How do I change Eclipse to use spaces instead of tabs?
By default Eclipse indents with a hard tab character. How do I change it to spaces?
21 Answers
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How to tell which version of a gem a rails app is using
I'm investigating a rails app - the prod server has two version of a specific gem installed, how can I tell which version the prod app is using?
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