Javascript-форум - Как подсчитать сумму всех индексов в массиве?

man=Array(); man[0]=Array(); man[0][0]="30"; man[0][1]="40"; man[0][2]="50"; man[0][3]="50"; man[0][4]="40"; //--------------------------------------------------------- man[1]=Array(); man[1][0]="20"; man[1][1]="31"; man[1][2]="31"; man[1][3]="351"; man[1][4]="31"; //--------------------------------------------------------- man[2]=Array(); man[2][0]="123"; man[2][1]="123"; man[2][2]="51"; man[2][3]="190"; man[2][4]="87"; //--------------------------------------------------------- man[3]=Array(); man[3][0]="22"; man[3][1]="56"; man[3][2]="1000"; man[3][3]="220"; man[3][4]="100"; var sum=0, i = man.length; while(i--) sum+=+man[i][4]; alert(sum);

<!DOCTYPE HTML>

<html>

<head>
  <title>Untitled</title>
  <meta charset="utf-8">
</head>

<body>
<script src="https://nervgh.github.io/js/recursive-iterator.min.js"></script>
<script>
man=Array();

man[0]=Array();
man[0][0]="30";
man[0][1]="40";
man[0][2]="50";
man[0][3]="50";
man[0][4]="40";
//---------------------------------------------------------
man[1]=Array();
man[1][0]="20";
man[1][1]="31";
man[1][2]="31";
man[1][3]="351";
man[1][4]="31";
//---------------------------------------------------------
man[2]=Array();
man[2][0]="123";
man[2][1]="123";
man[2][2]="51";
man[2][3]="190";
man[2][4]="87";
//---------------------------------------------------------
man[3]=Array();
man[3][0]="22";
man[3][1]="56";
man[3][2]="1000";
man[3][3]="220";
man[3][4]="100";



      var iterator = new RecursiveIterator(man),
      sum = 0;
      for(var item = iterator.next(); !item.done; item = iterator.next()) {
          var state = item.value;
          if (state.key  == 4 && state.deep == 2 )  sum += +state.node
      }
  alert(sum)

</script>
</body>

</html>

man=Array(); man[0]=Array(); man[0][0]="30"; man[0][1]="40"; man[0][2]="50"; man[0][3]="50"; man[0][4]="40"; //--------------------------------------------------------- man[1]=Array(); man[1][0]="20"; man[1][1]="31"; man[1][2]="31"; man[1][3]="351"; man[1][4]="31"; //--------------------------------------------------------- man[2]=Array(); man[2][0]="123"; man[2][1]="123"; man[2][2]="51"; man[2][3]="190"; man[2][4]="87"; //--------------------------------------------------------- man[3]=Array(); man[3][0]="22"; man[3][1]="56"; man[3][2]="1000"; man[3][3]="220"; man[3][4]="100"; alert(man.map(val=>+val[4]).reduce((c,t)=>t+=c)); //alert(man.map(function(val){return +val[4];}).reduce(function(c,t){return t+=c;})); /*var t=0; man.map(val=>t+=+val[4]); alert(t);*/ /*var t=0; man.map(function(val){return t+=+val[4];}); alert(t);*/