D3 Examples - fresh blockarrays

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>
​
<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)
​
    svg.append("text")
      .text("Edit the code below to change me!")
      .attr("y", 200)
      .attr("x", 120)
      .attr("font-size", 36)
      .attr("font-family", "monospace")
    
   array1 = [{name: "Arizona",
             location: "Southwest"},
            {name: "Virginia",
             location: "East"},
            {name: "Florida",
             location: "Southeast"}];
    
  array2 = [{name: "Arizona", id: "AZ"},
            {name: "Virginia", id: "VA"},
            {name: "Florida", id: "FL"}];
​
  // modify array1 so that each object it contains includes the 2 letter state "id"
   /* 
   array1.forEach(function(a1){
      //console.log(a1);
        })
    array2.forEach(function(a2) {
      //console.log(a2);
        if (a1.name==a2.name) {
        //console.log(a1.name,a2.name) {
          a1.id = a2.id;
        }
    })
    })     
    */
    
    // print all items that are in both array3 
  // and array4 to the console.
  
  array3 = ['a','b','c','d'];
  array4 = ['a','c','e','f','g'];
   array3.forEach(function(a3){
   array4.forEach(function(a4){
     if (a3 == a4){
       a3=a4;
       console.log(a3,a4)
     }
   })
   })
   
     
    
  //console.log(array1);
  </script>
</body>
​
    