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Javascript: take every nth Element of Array

Shibu Sarkar answered on May 27, 2022 Popularity 4/10 Helpfulness 1/10

answer Javascript: take every nth Element of Array

Javascript: take every nth Element of Array

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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

Popularity 4/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: javascript nth-element take

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