Андрей Буров

var arrmap = {}
for (x in arr['data']) {
  var v = arr['data'][x]
  arrmap[v['IDNum']] = v['count']
}

for (x in foo['data']) { 
  var v = foo['data'][x]
  if (arrmap[v['id']]) {
    console.log(arrmap[v['id']])
  }
}

echo date('r', 1493316022);
// Thu, 27 Apr 2017 18:00:22 +0000

date = new Date(1493316022 * 1000);
console.log(date.toString());
//Thu Apr 27 2017 21:00:22 GMT+0300 (MSK)

function c4() {
  var theCanvas = document.getElementById('canvas4');
  if(theCanvas && theCanvas.getContext) {
    theCanvas.width = 550;
    theCanvas.height = 250;
    var ctx = theCanvas.getContext('2d');
    if(ctx) {                 
      
    }
  }
}

In jQuery's case, $ is just an alias for jQuery

Object.keys(obj).map(function (key) { return obj[key]; });

var counter = 0;
document.addEventListener('keydown', function(e){
  if (e.shiftKey) {
    counter++;
  }
})