D3 Examples - Sample problems 2

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  <h1>Please look in the code below for 4 JavaScript practice problems.</h1>
  <p>(These problems don't include any SVG manipulation, so you will need to open the developer console in order to see the output of your code)</p>
  <script>
  // Problem 1: search array1 for those states whose location is "East"
  // using console.log(), print just the state name(s).
​
  array1 = [
                    {name: "Arizona",  location: "Southwest"},
            {name: "Virginia", location: "East"},
            {name: "Florida",  location: "Southeast"}
           ];
    
array1.forEach(function(s){
  if (s.location == "East"){
     console.log(s.name);
  }
});
​
  // Problem 2: search array1 (above) for those states whose location contains the substring "South"
  // using console.log(), print just the state name(s) for these states.
       
    array1.forEach(function(s){
  if (s.location.includes("South")){
     console.log(s.name);
  }
});
    
    
  // Problem 3: using iteration(loop) and console.log(), print those items that are in
  // array2 but NOT in array3
    // i == item in the array
    
  array2 = ['a','b','c', 65, 'd'];
  array3 = ['a','c','e','f','g', 87];
    
    array2.forEach(function(i) {
   if (array3.includes(i) == false) {
        console.log (i)
   }
  })
  
  // Problem 4: 'states' is an array of objects. Sort the array in ascending order
  // by state name
  
  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}]
  
  states.sort(function(a, b){
   if (a.name < b.name) { return -1 }
    else if (a.name == b.name) { return 0; }
  })
  console.log(states);
            
  // Problem 5: write code that determines which state(s) have a population value that is an even number. Print out the state(s) to the console
    // multiple of 2 or the remainder will be 0
​
  states.forEach(function (s) {
    console.log(s.name, s.population, s.population % 2 == 0)
    if (s.population % 2 == 0) ( console.log(S); }
                                
  })
  
​
  </script>
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