JavaScript Array filter() Method
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JavaScript Array filter() Method
The filter() method creates a new array with all elements that pass the test implemented by the provided function.
Note: This method does not alter the original array.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>Filter all odd numbers<p>
<script>
var myNumber = [1, 2, 3, 4, 5, 6, 7];
function odd(num) {
return (num % 2) != 0;
}
document.write(myNumber.filter(odd));
</script>
</body>
</html>
Syntax
Array.filter(function(value, index, arr), thisArg);
//or
Array.filter(functionName);
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| function(value, index, arr) | Required | Function to test for each element in an array. Value - Specifies a value or element in an array. index - Specifies the index of a value or element in an array. arr - Specifies the whole array. |
| thisArg | Optional | Specifies a value against which each element in an array is tested. |
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>Filter all odd numbers<p>
<script>
var myNumber = [1, 2, 3, 4, 5, 6, 7];
function odd(num, index, arr){
return (num % this) != 0;
}
document.write(myNumber.filter(odd, 2));
</script>
</body>
</html>
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