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What is the !! (not not) operator in JavaScript?
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Converts Object to boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, true.
!oObject // inverted boolean
!!oObject // non inverted boolean so true boolean representation
So !! is not an operator, it's just the ! operator twice.
Real W...
How can I sanitize user input with PHP?
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answered Sep 24 '08 at 22:30
troelskntroelskn
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Using str_replace so that it only acts on the first match?
... T.Todua
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answered Aug 10 '09 at 0:43
karim79karim79
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How to add text to a WPF Label in code?
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answered Feb 4 '11 at 20:14
Daniel A. WhiteDaniel A. White
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In SQL, how can you “group by” in ranges?
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Neither of the highest voted answers are correct on SQL Server 2000. Perhaps they were using a different version.
Here are the correct versions of both of them on SQL Server 2000.
select t.range as [score range], count(*) as [number of occurences]
from (
select case
when score bet...
Quickly reading very large tables as dataframes
I have very large tables (30 million rows) that I would like to load as a dataframes in R. read.table() has a lot of convenient features, but it seems like there is a lot of logic in the implementation that would slow things down. In my case, I am assuming I know the types of the columns ahead o...
How to get div height to auto-adjust to background size?
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TmacTmac
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Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected:
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answered Apr 30 '10 at 9:55
beny23beny23
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C++ obtaining milliseconds time on Linux — clock() doesn't seem to work properly
...econds, but on this Linux box I'm working on, it rounds it to the nearest 1000 so the precision is only to the "second" level and not to the milliseconds level.
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Cartesian product of x and y array points into single array of 2D points
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kennytmkennytm
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