How to search a Javascript array from start
Description
Array indexOf() has the following syntax:
indexOf(item_To_Look_For, optional_Index_To_Start_With)
indexOf() starts searching from the
front of the array.
indexOf() returns the position of the item
in the array or -1 if the item isn't in the array.
An identity comparison is used during comparing.
Example
var numbers = [1,2,3,4,5,4,3,2,1];
console.log(numbers.indexOf(4)); //3
console.log(numbers.indexOf(4, 4)); //5
//from ww w . ja v a 2 s . com
var person = { name: "JavaScript" };
var people = [{ name: "JavaScript" }];
var morePeople = [person];
console.log(people.indexOf(person)); //-1
The code above generates the following result.
