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How do I check in JavaScript if a value exists at a certain array index?
...y, arrays in JavaScript contain array.length elements, starting with array[0] up until array[array.length - 1]. An array element with index i is defined to be part of the array if i is between 0 and array.length - 1 inclusive. If i is not in this range it's not in the array.
So by concept, arrays...
Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
...ypal singh
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10
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Run JavaScript when an element loses focus
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answered Apr 20 '09 at 16:51
CanavarCanavar
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JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
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109
From http://www.sitepoint.com/javascript-truthy-falsy/
The following values are always falsy:
...
How do .gitignore exclusion rules actually work?
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/a/b/c/*
!foo
Seems to work for me (git 1.7.0.4 on Linux). The * is important as otherwise you're ignoring the directory itself (so git won't look inside) instead of the files within the directory (which allows for the exclusion).
Think of the exclusions as saying "bu...
Akka Kill vs. Stop vs. Poison Pill?
... |
edited Sep 15 '14 at 20:16
Kamiel Wanrooij
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a...
Unique constraint on multiple columns
...LL,
[scode] [int] NULL,
[dcode] [int] NULL,
[name] [nvarchar](50) NULL,
[address] [nvarchar](50) NULL,
CONSTRAINT [PK_user_1] PRIMARY KEY CLUSTERED
(
[userID] ASC
),
CONSTRAINT [UQ_codes] UNIQUE NONCLUSTERED
(
[fcode], [scode], [dcode]
)
) ON ...
Putting a simple if-then-else statement on one line [duplicate]
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered May 10 '10 at 13:00
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Difference between json.js and json2.js
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edited Feb 4 '11 at 19:07
Chris
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answered Fe...
Rails migrations: Undo default setting for a column
...shua Pinter
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answered Nov 17 '09 at 2:36
Jeremy MackJeremy Mack
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