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How to check if a variable is an integer in JavaScript?
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@connorbode in javascript all numbers have the same type (there is no float or double), so 2.0 === 2 since the unnecessary decimal is just a different representation of the same number, thus parseInt(2.0) === 2.0 is equivalent to parseInt(2) === 2 whi...
Define all functions in one .R file, call them from another .R file. How, if possible?
How do I call functions defined in abc.R file in another file, say xyz.R?
1 Answer
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Is there a macro recorder for Eclipse? [closed]
...nd it works great. In order to make it work, then the file PracticallyMacro_0.4.9.jar needs to be put in the eclipse/downloads/plugins directory (create the plugins directory if it doesn't exist). You can edit macros by going to Windows/Preferences/Practically Macro Options and you can run the macro...
What is the bower (and npm) version syntax?
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In a nutshell, the syntax for Bower version numbers (and NPM's) is called SemVer, which is short for 'Semantic Versioning'. You can find documentation for the detailed syntax of SemVer as used in Bower and NPM on the API for the semver parser within Node/npm. You can learn more about the unde...
Where to get “UTF-8” string literal in Java?
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You don't really need to call name() at all. You can directly pass the Charset object into the InputStreamReader constructor.
– Natix
Nov 19 '14 at 10:33
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Bash Templating: How to build configuration files from templates with Bash?
...\}/defined $ENV{$1} ? $ENV{$1} : $&/eg' < template.txt
to replace all ${...} strings with corresponding enviroment variables (do not forget to export them before running this script).
For pure bash this should work (assuming that variables do not contain ${...} strings):
#!/bin/bash
while...
Get list from pandas DataFrame column headers
...input so I won't know how many columns there will be or what they will be called.
19 Answers
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Django rest framework, use different serializers in the same ModelViewSet
... like to provide two different serializers and yet be able to benefit from all the facilities of ModelViewSet :
6 Answers
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Why does typeof NaN return 'number'?
...e or cosine of a number which is less than −1 or
greater than +1.
All these values may not be the same. A simple test for a NaN is to test value == value is false.
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Rails :include vs. :joins
...de functionality was changed with Rails 2.1. Rails used to do the join in all cases, but for performance reasons it was changed to use multiple queries in some circumstances. This blog post by Fabio Akita has some good information on the change (see the section entitled "Optimized Eager Loading")....