loop through json object javascript

1var person={
2 	first_name:"johnny",
3  	last_name: "johnson",
4	phone:"703-3424-1111"
5};
6for (var property in person) {
7  	console.log(property,":",person[property]);
8}

1var p = {
2    0: "value1",
3    "b": "value2",
4    key: "value3"
5};
6
7for (var key of Object.keys(p)) {
8    console.log(key + " -> " + p[key])
9}

1var arr = [ {"id":"10", "class": "child-of-9"}, {"id":"11", "class": "child-of-10"}];
2    
3for (var i = 0; i < arr.length; i++){
4  document.write("<br><br>array index: " + i);
5  var obj = arr[i];
6  for (var key in obj){
7    var value = obj[key];
8    document.write("<br> - " + key + ": " + value);
9  }
10}

1var arr = [ "one", "two", "three", "four", "five" ];
2var obj = { one:1, two:2, three:3, four:4, five:5 };
3
4jQuery.each(arr, function() {
5  $("#" + this).text("My id is " + this + ".");
6  return (this != "four"); // will stop running to skip "five"
7});
8
9jQuery.each(obj, function(i, val) {
10  $("#" + i).append(document.createTextNode(" - " + val));
11});

1let a = {x: 200, y: 1}
2let attributes = Object.keys(a)
3console.log(attributes)
4//output: ["x", "y"]

1var p = {
2    "p1": "value1",
3    "p2": "value2",
4    "p3": "value3"
5};
6
7for (var key in p) {
8    if (p.hasOwnProperty(key)) {
9        console.log(key + " -> " + p[key]);
10    }
11}