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javascript set a variable if undefined
...efined. It would therefore not only match undefined but also null, false, 0, NaN, "" (but not "0").
If you want to set to default only if the variable is strictly undefined then the safest way is to write:
var x = (typeof x === 'undefined') ? your_default_value : x;
On newer browsers it's actu...
HTTP Content-Type Header and JSON
...
Luke Stevenson
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answered Dec 16 '13 at 20:48
Rocket HazmatRock...
How to start two threads at “exactly” the same time
...|
edited Mar 24 '14 at 16:01
answered Jul 31 '10 at 3:14
En...
What are Transient and Volatile Modifiers?
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answered Aug 23 '10 at 6:03
Stephen CStephen C
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How to specialize std::hash::operator() for user-defined type in unordered containers?
... |
edited Nov 16 '11 at 20:14
answered Nov 16 '11 at 20:07
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Is module __file__ attribute absolute or relative?
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Ioannis Filippidis
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answered Aug 19 '11 at 4:23
agfagf
140k323...
What is a provisioning profile used for when developing iPhone applications?
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answered Jul 29 '10 at 13:02
AkuseteAkusete
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What is the advantage of GCC's __builtin_expect in if else statements?
...e the assembly code that would be generated from:
if (__builtin_expect(x, 0)) {
foo();
...
} else {
bar();
...
}
I guess it should be something like:
cmp $x, 0
jne _foo
_bar:
call bar
...
jmp after_if
_foo:
call foo
...
after_if:
You can see that the instr...
Why does Java's Arrays.sort method use two different sorting algorithms for different types?
...
202
The most likely reason: quicksort is not stable, i.e. equal entries can change their relative p...
How can I set the max-width of a table cell using percentages?
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answered Dec 11 '11 at 17:30
Jukka K. KorpelaJukka K. Korpela
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