A couple of useful features

Once I needed to make an array of unique elements in javascript. Sincerely believing in the power of jQuery, I began to look for the necessary opportunity in the manual, but I did not find anything useful. Because This opportunity was extremely necessary for me, I had to write the function myself.

Array.prototype.unique = function () {
var nArray = new Array;
for (i = 0; i <= this .length-1; i ++) {
if (! nArray.contains ( this [i])) {
nArray.length + = 1;
nArray [nArray.length-1] = this [i];
}
}
return nArray;
}

Array.prototype.contains = function (val) {
for (j = 0; j <= this .length-1; j ++) {
if ( this [j] == val) return true ;
}
return false ;
} * This source code was highlighted with Source Code Highlighter .

unique - returns a new array consisting of unique elements;
contains - checks the presence of the specified element in the array. In general, this function is necessary for the work of the first, but can be used separately.
')
That's probably all :)

PS
If something similar has already appeared on Habré, then please write about it in the comments. I also enjoy reading your wishes and suggestions.