The Array.lastIndexOf() is an inbuilt TypeScript function which is used to get the last index at which a given element can be found in the array.
Syntax:
array.lastIndexOf(searchElement[, fromIndex])
Parameter: This method accepts two parameter as mentioned above and described below:
- searchElement : This parameter is the element to locate in the array.
- fromIndex : This parameter is the index at which to start searching backwards.
Return Value: This method returns the index of the found element from the last.
Below examples illustrate the Array lastIndexOf() method in TypeScript.
Example 1:
JavaScript
<script> // Driver code var arr = [ 11, 89, 23, 7, 98 ]; // use of lastIndexOf() method var val = arr.lastIndexOf(7) // printing element console.log( val ); </script> |
Output:
3
Example 2:
JavaScript
<script> // Driver code var arr = [ 'a','b','c','a','e' ]; // use of lastIndexOf() method var val = arr.lastIndexOf("a") var val1 = arr.lastIndexOf("c") // printing element console.log(val); console.log(val1); </script> |
Output:
3 2
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