indexOf
array.indexOf('search_string');<script type="text/javascript">
var scripts = new Array();
scripts[0] = "PHP";
scripts[1] = "ASP";
scripts[2] = "JavaScript";
scripts[3] = "HTML";
document.write(scripts.indexOf("HTML"));
</script>
Let us search for SQL and we will get the output as -1 ( as this element is not present inside array )
Searching from the start
If we have same element at two different places then indexOf will return the position of fist matching starting from the start of the array. ( not from end ). This code will explain that<script type="text/javascript">
var scripts = new Array();
scripts[0] = "PHP";
scripts[1] = "ASP";
scripts[2] = "JavaScript";
scripts[3] = "HTML";
scripts[4] = "ASP";
document.write(scripts.indexOf("ASP"));
</script>
lastIndexOf
We can search and if found get the position of the element inside Array by using lastIndexOf function. The difference between indexOf and lastIndexOf is searching the array starts from end in later case.Here is an example.
<script type="text/javascript">
var scripts = new Array();
scripts[0] = "PHP";
scripts[1] = "ASP";
scripts[2] = "JavaScript";
scripts[3] = "HTML";
scripts[4] = "ASP";
document.write(scripts.lastIndexOf("ASP"));
</script>Array Reference Sort the elements of an Array
This article is written by plus2net.com team.
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