Javascript: take every nth Element of Array
var log = function(val){document.body.innerHTML+='<div></pre>'+val+'</pre></div>'} var oldArr = [0,1,2,3,4,5,6,7,8,9,10] var arr = []; var maxVal = 5; var delta = Math.floor( oldArr.length / maxVal ); // avoid filter because you don't want // to loop over 10000 elements ! // just access them directly with a for loop ! // | // V for (i = 0; i < oldArr.length; i=i+delta) { arr.push(oldArr[i]); } log('delta : ' + delta + ' length = ' + oldArr.length) ; log(arr); Run code snippet
Source: stackoverflow.com