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In javascript, is an empty string always false as a boolean?
...avior:
ToBoolean
The result is false if the argument is the empty String (its length is zero);
otherwise the result is true
Quote taken from http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf
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Find if current time falls in a time range
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edited Oct 1 '09 at 17:55
answered Oct 1 '09 at 15:08
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Why is '+' not understood by Python sets?
... as set difference. You can also use ^ for symmetric set difference (i.e., it will return a new set with only the objects that appear in one set but do not appear in both sets).
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Checking if a key exists in a JS object
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edited Dec 5 '14 at 15:30
answered Jun 15 '13 at 18:10
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Linq select objects in list where exists IN (A,B,C)
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edited Jan 10 '13 at 12:20
answered Jan 10 '13 at 11:55
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Add Bootstrap Glyphicon to Input Box
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Without Bootstrap:
We'll get to Bootstrap in a second, but here's the fundamental CSS concepts in play in order to do this yourself. As beard of prey points out, you can do this with CSS by absolutely positioning the icon in...
How do I do redo (i.e. “undo undo”) in Vim?
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edited Oct 12 '09 at 17:24
answered Oct 12 '09 at 17:12
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Batch Renaming of Files in a Directory
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Such renaming is quite easy, for example with os and glob modules:
import glob, os
def rename(dir, pattern, titlePattern):
for pathAndFilename in glob.iglob(os.path.join(dir, pattern)):
title, ext = os.path.splitext(os.path.basena...
Delaying a jquery script until everything else has loaded
...ady() multiple times in a page. The code gets run in the sequence in which it appears.
You can use the $(window).load() event for your code since this happens after the page is fully loaded and all the code in the various $(document).ready() handlers have finished running.
$(window).load(function...
How to test if string exists in file with Bash?
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grep -Fxq "$FILENAME" my_list.txt
The exit status is 0 (true) if the name was found, 1 (false) if not, so:
if grep -Fxq "$FILENAME" my_list.txt
then
# code if found
else
# code if not found
fi
Explanation
Here are the relevant sections of the man page for ...