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Immanuel Bendahan edited this page Sep 30, 2017
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This version is called Amur Tiger
isset(object);
What does it do?
isset()
is used to check if a variable is set.
How to use? (example)
var x = 10;
// x is set
if (isset(x)) {
alert('x is set!');
} else {
alert('x is NOT set!');
}
// y is NOT set
if (isset(y)) {
alert('y is set!');
} else {
alert('y is NOT set!');
}
Explanation
isset(object);
will give an output either
true
or
false
So if the object
(here x
and y
) is set, isset()
will give an output of true
. When not set, it will give an output of false
.