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JS example of how to get the value of the same key in a multidimensional array

高洛峰
高洛峰Original
2017-01-14 10:56:411417browse

The example of this article describes the JS implementation method of obtaining the value of the same key in a multi-dimensional array. Share it with everyone for your reference, the details are as follows: 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Demo </TITLE>
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script>
function jstest(){
  var arr=[{&#39;key1&#39;:&#39;value1&#39;,&#39;key2&#39;:&#39;value2&#39;,&#39;key3&#39;:&#39;value3&#39;},{&#39;key1&#39;:&#39;value4&#39;,&#39;key2&#39;:&#39;value5&#39;,&#39;key3&#39;:&#39;value6&#39;},{&#39;key1&#39;:&#39;value7&#39;,&#39;key2&#39;:&#39;value8&#39;,&#39;key3&#39;:&#39;value9&#39;}] ;
  var obj={};
  var narr=new Array();
  for(var i=0;i<arr.length;i++){
    for(var j in arr[i]){
      if(obj[j]!=undefined)
      obj[j]+=arr[i][j];
      else
      obj[j]=arr[i][j];
    }
  }
  for(var i in obj){
    narr.push(eval("({&#39;"+i+"&#39;:&#39;"+obj[i]+"&#39;})"));
  }
  //alert(narr[0].key1);
  console.log(narr[1].key2);
}
jstest();
</script>
</HEAD>
<BODY>
</BODY>
</HTML>

The operation effect diagram is as follows:

JS example of how to get the value of the same key in a multidimensional array

Hope What this article describes will be helpful to everyone in JavaScript programming.

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