Break statement in javascript array map method
Possible Duplicate:
How to short circuit Array.forEach like calling break?
Is there a way so that I can break out of array map method after my condition is met ? I tried the following which throws "Illegal Break Statement" Error. This is some random example I came up with.
var myArray = [22,34,5,67,99,0];
var hasValueLessThanTen = false;
myArray.map(function (value){
if(value<10){
hasValueLessThanTen = true;
break;
}
}
);
We can do using for loops, but I wanted to know whether we can accomplish the same using map method ?
That's not possible using the built-in Array.prototype.map . However, you could use a simple for -loop instead, if you do not intend to map any values:
var hasValueLessThanTen = false;
for (var i = 0; i < myArray.length; i++) {
if (myArray[i] < 10) {
hasValueLessThanTen = true;
break;
}
}
Or, as suggested by @RobW , use Array.prototype.some to test if there exists at least one element that is less than 10. It will stop looping when some element that matches your function is found:
var hasValueLessThanTen = myArray.some(function (val) {
return val < 10;
});