JavaScript function equivalent to Arraygetindex

 

This js function will find the index of an array element with the given value in an array.
for Example you are having an array like

var mnuArray = new Array("Groups","Services","Applications");

And want to know the index/position of and element in an array, then
Ex. you can call mnuArray.findIndex("Services");
This will return "1″.

 

This will be helpful if you are having a large size array/the elements are unknown which you have populated from an dB

 

Array.prototype.findIndex = function(value){
var ctr = "";
for (var i=0; i < this.length; i++) {
// use === to check for Matches. ie., identical (===), ;
if (this[i] == value) {
return i;
}
}
return ctr;
};

And advanced version of this function is,
If you want to do the same in the case of multidimensional arrays
then use the following

 

Array.prototype.findIndexByCol = function(value,cIdx){
var ctr = "";
for (var i=0; i < this.length; i++) {
// use === to check for Matches. ie., identical (===), ;
if (this[i][cIdx] == value) {
//alert(this[i][cIdx]+"===="+value);
return i;
}
}
return ctr;
};