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Test if object implements interface
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edited Sep 3 '16 at 1:06
Will Brode
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answered Apr 19 '09 at 21:...
Painless way to install a new version of R?
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answered Oct 20 '10 at 11:16
Joris MeysJoris Meys
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My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
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edited Sep 26 '12 at 20:10
leggetter
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How to ignore xargs commands if stdin input is empty?
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edited May 13 '16 at 20:55
kenorb
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How do you add CSS with Javascript?
...DOM Level 2 CSS interfaces (MDN):
var sheet = window.document.styleSheets[0];
sheet.insertRule('strong { color: red; }', sheet.cssRules.length);
...on all but (naturally) IE8 and prior, which uses its own marginally-different wording:
sheet.addRule('strong', 'color: red;', -1);
There is a theo...
UnboundLocalError on local variable when reassigned after first use
The following code works as expected in both Python 2.5 and 3.0:
12 Answers
12
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indexOf method in an object array?
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1096
I think you can solve it in one line using the map function:
pos = myArray.map(function(e) { ...
Calculate the date yesterday in JavaScript
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var date = new Date();
date ; //# => Fri Apr 01 2011 11:14:50 GMT+0200 (CEST)
date.setDate(date.getDate() - 1);
date ; //# => Thu Mar 31 2011 11:14:50 GMT+0200 (CEST)
share
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Efficient SQL test query or validation query that will work across all (or most) databases
...ir SQL connections for idleness. For example, the JDBC pooling library c3p0 has a property called preferredTestQuery , which gets executed on the connection at configured intervals. Similarly, Apache Commons DBCP has validationQuery .
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Uploading both data and files in one form using Ajax?
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10 Answers
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