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Keep only first n characters in a string?
Is there a way in JavaScript to remove the end of a string?
7 Answers
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How to zero pad a sequence of integers in bash so that all have the same width?
I need to loop some values,
13 Answers
13
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Function to convert column number to letter?
Does anyone have an Excel VBA function which can return the column letter(s) from a number?
28 Answers
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How can I configure Logback to log different levels for a logger to different destinations?
How can I configure Logback to log different levels for a logger to different destinations?
12 Answers
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What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
What does ArrayIndexOutOfBoundsException mean and how do I get rid of it?
25 Answers
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Fast check for NaN in NumPy
I'm looking for the fastest way to check for the occurrence of NaN ( np.nan ) in a NumPy array X . np.isnan(X) is out of the question, since it builds a boolean array of shape X.shape , which is potentially gigantic.
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How to remove non-alphanumeric characters?
I need to remove all characters from a string which aren't in a-z A-Z 0-9 set or are not spaces.
9 Answers
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Very simple log4j2 XML configuration file using Console and File appender
I'd like a very simple XML configuration file with a console and a file appender using log4j2.
4 Answers
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How to convert a negative number to positive?
How can I convert a negative number to positive in Python? (And keep a positive one.)
6 Answers
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What is the difference between CHARACTER VARYING and VARCHAR in PostgreSQL?
John uses CHARACTER VARYING in the places where I use VARCHAR .
I am a beginner, while he is an expert.
This suggests me that there is something which I do not know.
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