D3 Examples - JS Bin character frequency part 2 // source http://jsbin.com/kaduruy

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<!DOCTYPE html>
<html>
<head>
<meta name="description" content="character frequency part 2">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
​
<script id="jsbin-javascript">
var maxSpeed = {
    car: 300, 
    bike: 60, 
    motorbike: 200, 
    airplane: 1000,
    helicopter: 400, 
    rocket: 8 * 60 * 60
};
​
​
function getLetterCount(arr){
    return arr.reduce(function(prev,next)
     {
        prev[next] = (prev[next] + 1) || 1;
 
      return prev;
    },{});
}
 
​
var xx ="hayjf".split('') ;
​
console.clear();
console.log(getLetterCount(xx));
///////////////////////////////////////////////////////////////////////
​
var sortable = [];
for (var vehicle in maxSpeed) {
  console.log(vehicle+ ' ' + maxSpeed[vehicle]);
    sortable.push([vehicle, maxSpeed[vehicle]]);
}
​
​
sortable.sort(function(a, b) {
    return a[1] - b[1];
});
​
​
​
function compareNumbers(a, b) {
  return a[1] - b[1];
}
console.log('Sorted without a compare function:', sortable.sort());
​
console.log('Sorted with compareNumbers:', sortable.sort(compareNumbers));
</script>
​
​
​
<script id="jsbin-source-javascript" type="text/javascript">var maxSpeed = {
    car: 300, 
    bike: 60, 
    motorbike: 200, 
    airplane: 1000,
    helicopter: 400, 
    rocket: 8 * 60 * 60
};
​
​
function getLetterCount(arr){
    return arr.reduce(function(prev,next)
     {
        prev[next] = (prev[next] + 1) || 1;
 
      return prev;
    },{});
}
 
​
var xx ="hayjf".split('') ;
​
console.clear();
console.log(getLetterCount(xx));
///////////////////////////////////////////////////////////////////////
​
var sortable = [];
for (var vehicle in maxSpeed) {
  console.log(vehicle+ ' ' + maxSpeed[vehicle]);
    sortable.push([vehicle, maxSpeed[vehicle]]);
}
​
​
sortable.sort(function(a, b) {
    return a[1] - b[1];
});
​
​
​
function compareNumbers(a, b) {
  return a[1] - b[1];
}
console.log('Sorted without a compare function:', sortable.sort());
​
console.log('Sorted with compareNumbers:', sortable.sort(compareNumbers));</script></body>
</html>
    