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Test if string is a number in Ruby on Rails
...rt of Rails or 1.8? String.is_a?(Numeric) works. See also stackoverflow.com/questions/2095493/….
– Ross Attrill
Jun 16 '14 at 7:10
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How to create directory automatically on SD card
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Make sure external storage is present:
http://developer.android.com/guide/topics/data/data-storage.html#filesExternal
private boolean isExternalStoragePresent() {
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = fals...
css label width not taking effect
... width:125px;
text-transform: uppercase;
display:inline-block
}
http://jsfiddle.net/aqMN4/
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How can I get sin, cos, and tan to use degrees instead of radians?
...onversion function that applies the needed math, and invoke those instead. http://en.wikipedia.org/wiki/Radian#Conversion_between_radians_and_degrees
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ReactJS: Modeling Bi-Directional Infinite Scrolling
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have a look at http://adazzle.github.io/react-data-grid/index.html#
This looks like a powerful and performant datagrid with Excel-like features and lazy loading/optimized rendering (for millions of rows) with rich editing features (MIT lice...
Appending the same string to a list of strings in Python
... it to every string contained in a list, and then have a new list with the completed strings. Example:
11 Answers
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How to validate IP address in Python? [duplicate]
...at's the best way to validate that an IP entered by the user is valid? It comes in as a string.
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Using print statements only to debug
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
JSON.parse vs. eval()
...mes where you need to use eval() to the JSON string. Use JSON parser from http://json.org as that handles everything a lot easier for you.
Eval() is an evil but against some browsers its a necessary evil but where you can avoid it, do so!!!!!
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