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Any reason not to use '+' to concatenate two strings?
A common antipattern in Python is to concatenate a sequence of strings using + in a loop. This is bad because the Python interpreter has to create a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, b...
How to get all registered routes in Express?
I have a web application built using Node.js and Express. Now I would like to list all registered routes with their appropriate methods.
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Setting different color for each series in scatter plot on matplotlib
Suppose I have three data sets:
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How to pause / sleep thread or process in Android?
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Why switch is faster than if
Lots of Java books describe the switch statement as being faster than the if else statement. But I did not find out anywhere why switch is faster than if .
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hexadecimal string to byte array in python
I have a long Hex string that represents a series of values of different types. I wish to convert this Hex String into a byte array so that I can shift each value out and convert it into its proper data type.
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What is the best regular expression to check if a string is a valid URL?
How can I check if a given string is a valid URL address?
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Validate decimal numbers in JavaScript - IsNumeric()
What's the cleanest, most effective way to validate decimal numbers in JavaScript?
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