JavaScript Array Methods Part5 - JavaScript Tutorial 102
Notes for You:: JavaScript Array Methods Part5 - JavaScript Tutorial 102
JavaScript Array indexOf() and lastIndexOf() Methods.
indexOf() Method:
- returns an index of the first occurrence of given search element.
Syntax:
indexOf(searchElement:*):number
where:
searchElement: indicates element to be searched.
number: indicates index of the first occurrence of the element to be searched.
lastIndexOf() Method:
- returns an index of the last occurrence of given search element.
Syntax:
lastIndexOf(searchElement:*):number
where:
searchElement: indicates element to be searched.
number: indicates index of the last occurrence of the element to be searched.
Example Code:
var studNames = ["Ram","Ravi","Raju","Raghu","Gopla","Ravi"];
document.write(studNames); // Ram,Ravi,Raju,Raghu,Gopla,Ravi
document.write("<br/>");
document.write(studNames.indexOf("Ravi") ); // 1
document.write("<br/>");
document.write(studNames.lastIndexOf("Ravi") ); // 5
document.write("<br/>");
Note:
- replace < with less-than symbol.
- replace > with greater-than symbol.
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