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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...
Is it valid to have a tag inside another tag?
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Yes, since a website is generally divided into one or more sections, use it as long as you feel ...
Create empty queryset by default in django form fields
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marianobianchimarianobianchi
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python tuple to dict
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answered Sep 24 '10 at 1:07
Greg HewgillGreg Hewgill
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Difference between final static and static final
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edited Jul 20 '16 at 10:31
NatNgs
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answered Jun 27 ...
Jquery .on() submit event
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You need to delegate event to the document level
$(document).on('submit','form.remember',functi...
RelativeLayout is taking fullscreen for wrap_content
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edited Jun 20 at 9:12
Community♦
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answered Jun 26 '11 at 20:15
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What's the need of array with zero elements?
...lloc(sizeof(*var) + extra);
You can access var->data with indices in [0, extra). Note that sizeof(struct something) will only give the size accounting for the other variables, i.e. gives data a size of 0.
It may be interesting also to note how the standard actually gives examples of mallocin...
What exactly is Arel in Rails 3.0?
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What exactly is Arel in Rails 3.0?
It's an object model for an algebra of relational query operators.
I understand that it is a replacement for ActiveRecord
No, it isn't. It's a replacement for hand-crafting SQL queries in strings. It is a common query l...
How to get an array of specific “key” in multidimensional array without looping
...ap(function ($ar) {return $ar['id'];}, $users);
Before(Technically php 4.0.6+), you must create an anonymous function with create_function instead:
$ids = array_map(create_function('$ar', 'return $ar["id"];'), $users);
s...