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jQuery.inArray(), how to use it right?
...
inArray returns the index of the element in the array, not a boolean indicating if the item exists in the array. If the element was not found, -1 will be returned.
So, to check if an item is in the array, use:
if(jQuery.inArray("test", myarray) !=...
Why does “,,,” == Array(4) in Javascript?
...length of the array to that number. So you can say you have four empty indexes (same as [,,,]) and the default string representation of arrays is a comma-separated list of its elements:
> ['a','b','c'].toString()
"a,b,c"
How the comparison works is described in section 11.9.3 of the specif...
Find the most common element in a list
...me tricky logic to well-tested standard library components. Consider for example:
import itertools
import operator
def most_common(L):
# get an iterable of (item, iterable) pairs
SL = sorted((x, i) for i, x in enumerate(L))
# print 'SL:', SL
groups = itertools.groupby(SL, key=operator.ite...
When to use lambda, when to use Proc.new?
...da-created proc's return in action. It behaves in a way that you probably expect:
def whowouldwin
mylambda = lambda {return "Freddy"}
mylambda.call
# mylambda gets called and returns "Freddy", and execution
# continues on the next line
return "Jason"
end
whowouldwin
#=> "Jason"
...
How to read keyboard-input?
... numeric value
just convert it:
try:
mode=int(raw_input('Input:'))
except ValueError:
print "Not a number"
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JavaScript closure inside loops – simple practical example
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IntelliJ IDEA JDK configuration on Mac OS
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If you are on Mac OS X or Ubuntu, the problem is caused by the symlinks to the JDK. File | Invalidate Caches should help. If it doesn't, specify the JDK path to the direct JDK Home folder, not a symlink.
Invalidate Caches menu item is available ...
Fastest way to convert JavaScript NodeList to Array?
...s just not cross-browser. Even though The Times They Are a-Changin'
@kangax (IE 9 preview)
Array.prototype.slice can now convert
certain host objects (e.g. NodeList’s)
to arrays — something that majority of
modern browsers have been able to do
for quite a while.
Example:
Array.pr...
How do I get the time of day in javascript/Node.js?
.... Don't link to that "W3C Schools" fake garbage
– Max
Mar 12 '19 at 12:04
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How to delete duplicate lines in a file without sorting it in Unix?
Is there a way to delete duplicate lines in a file in Unix?
9 Answers
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