TypeScript | Array filter() Method

The Array.filter() is an inbuilt TypeScript function which is used to creates a new array with all elements that pass the test implemented by the provided function. 
Syntax:

array.filter(callback[, thisObject])

Parameter: This methods accepts two parameter as mentioned and described below:

• callback : This parameter is the Function to test for each element.
• thisObject : This parameter is the Object to use as this when executing callback.

Return Value: This method returns created array. 
Below examples illustrate the Array filter() method in TypeScript
Example 1:

JavaScript

<script>
    // check for positive number
    function ispositive(element, index, array)
    {
       return element > 0;
    }

    // Driver code
    var arr = [ 11, 89, -23, 7, 98 ];

    // check for positive number
    var value = arr.filter(ispositive);
    console.log( value );
</script>

Output:

[11,89,7,98]

Example 2:

JavaScript

<script>
    // check for odd number
    function isodd(element, index, array)
    {
       return (element % 2 == 1);
    }
    // Driver code
    var arr = [ 11, 89, 23, 7, 98 ];

    // check for odd number
    var value = arr.filter(isodd);
    console.log( value );
</script>

Output:

[11,89,23,7]