That’s not JSON. It’s just Javascript objects, and has nothing at all to do with JSON. You can use brackets to set the properties dynamically. Example: var obj = {}; obj[‘name’] = value; obj[‘anotherName’] = anotherValue; This gives exactly the same as creating the object with an object literal like this: var obj = { … Read more
data.replace(/([‘”])?([a-zA-Z0-9]+)([‘”])?:/g, ‘”$2″:’); That will replace any single quotes on the parameter name, and add any that are missing.
As Russ Cam said, you avoid polluting the global namespace, which is very important in these days of combining scripts from multiple locations (TinyMCE, etc.). As Alex Sexton said, it makes for good code organisation as well. If you’re using this technique, I’d suggest using the module pattern. This still uses object literals, but as … Read more
This is supported in node.js and newer environments. var obj = {a: “a”, b: “b”}; Object.keys(obj).length // 2
You could make var3 a function, and calling it will allow you to use ‘this’: x= { v1:4, v2:5, v3:function(){return this.v1 + this.v2;} }; alert(x.v3());
var arr = []; var len = oFullResponse.results.length; for (var i = 0; i < len; i++) { arr.push({ key: oFullResponse.results[i].label, sortable: true, resizeable: true }); }
The prototype object is meant to be used on constructor functions, basically functions that will be called using the new operator to create new object instances. Functions in JavaScript are first-class objects, which means you can add members to them and treat them just like ordinary objects: var STORE = { item : function() { … Read more
If you want to use a variable for a property name, you can use Computed Property Names. Place the variable name between square brackets: var foo = “bar”; var ob = { [foo]: “something” }; // ob.bar === “something” If you want Internet Explorer support you will need to use the ES5 approach (which you … Read more
Because “key” + test is an expression and not an identifier nor a string literal nor a number literal, which are the only things that are allowed as the key in an object literal. You have to use the [] notation after creating the object for such a dynamic key: var test123 = {}; test123[“key” … Read more
Note that the Babel translation is assuming strict mode, but your result with window indicates you’re running your code in loose mode. If you tell Babel to assume loose mode, its transpilation is different: var _this = this; // ** var arrowObject = { name: ‘arrowObject’, printName: function printName() { console.log(_this); // ** } }; … Read more