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javascript function to determine whether an array contains an element_javascript skills

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Release： 2016-05-16 18:26:05
Original
1025 people have browsed it
Copy code The code is as follows:

Array.prototype.contains = function(obj) {
var i = this.length;
while (i–) {
if (this[i] === obj) {
return true;
}
}
return false;
}

or
Copy the code The code is as follows:

Array.prototype.contains = function (element) {
for (var i = 0; i < this.length; i ) {
if (this[i] == element) {
return true;
}
}
return false;
}

It is said that while minus iteration is the fastest method in js, I don’t know if it is true.
Related labels：
element Include array
source：php.cn
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