D3 Examples - homework set 1

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homework set 1!
<!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>
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<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)
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    svg.append("text")
      .text("homework set 1!")
      .attr("y", 200)
      .attr("x", 120)
      .attr("font-size", 36)
      .attr("font-family", "monospace")
    
    // Problem 1: modify array1 so that each object it contains includes the 2 letter state "id"
console.log("question 1")
  array1 = [
                    {name: "Arizona",  location: "Southwest"},
            {name: "Virginia", location: "East"},
            {name: "Florida",  location: "Southeast"}
           ];
    
  array2 = [
            {name: "Virginia", id: "VA"},
                    {name: "Arizona", id: "AZ"},
            {name: "Florida", id: "FL"}
                 ];
  
  array1.forEach(function(a1) {
    array2.forEach(function(a2) {
      if (a1.name == a2.name) {
        a1.id = a2.id;
     }
    })
  })
  //check if successfully combined arrays.    
  console.log(array1)
  // Problem 2: print all items that are in both array3 
  // and array4 to the console.
  console.log("problem 2")
  array3 = ['a','b','c','d'];
  array4 = ['a','c','e','f','g'];
  
  // console.log("first solution:")
  array3.forEach(function (a3) {
    array4.forEach(function (a4) {
      if (a3 == a4) {
        console.log(a3)
      }
    })
  })
  
  // console.log("second solution:")
  array3.forEach(function (a3) {
    if (array4.includes(a3)) {
        
        }
  })
  
  // Problem 3: 'states' is an array of objects. Sort the array in ascending order by population
  
  states = [{name: "Alaska", id: "AK", population: 741894},
            {name: "Virginia", id: "VA", population: 8411808},
                    {name: "Arizona", id: "AZ", population: 6931071},
            {name: "Florida", id: "FL", population: 20984400}]
      
  console.log("question 3")  
  
  //loop through (sort) through states.
  states.sort (function(a,b){
   //order the population element into ascending order 
     if (a.population < b.population) {return -1}
    else if (a.population == b.population) {return 0}
    else {return 1}
  })
  //check if you sorted it correctly
  console.log(states)
  
  // Problem 4: using console.log() and the appropriate index on the sorted 'states' array, print the state with the smallest population.
  console.log("problem 4")
  //print the state name with the lowest population value
  console.log(states[0].name)
  
  // someNumbers is an array containing all integers from 1-10 inclusively
 // Problem 5: using console.log(), a loop,and the modulus operator, print those members of someNumbers that are NOT multiples of 3.
    
  someNumbers = d3.range(1,11)
​
    console.log("question 5")
//loop through someNumbers
someNumbers.forEach(function(n){
  //est. a condition for non multiples of 3 
  if (n % 3 !== 0) {console.log(n);}       
})
  
​
​
  </script>
</body>
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