Is there a better way to get the type of a variable in JS than typeof? It works fine when you do:  > typeof 1 "number" > typeof "hello" "string"   But it's useless when you try:  > typeof [1,2] "object"...
What are the general rules that dictate when, where, how and why angle brackets, i.e. "<...>", should be used in TypeScript?  While I think I understand many individual uses of these brackets, I have a hard time seeing general patterns...
I just stumbled upon the documentation for the new (proposed for ES6, but already implemented in Firefox, Chrome & Opera) datatype in JavaScript, Symbol:  https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol htt...
Consider empty JavaScript array:  var a = []; alert(a == false); // shows true alert(!a); // shows false!   How to explain this? What are the rules?...
I don't know why I never asked myself that questioned the last years before, but suddenly I could not find any answer for myself or with google.  Javascript is known to have no types for variables. A really nice thing. But somehow it must determi...
How can I check if a variable's type is of type Boolean?  I mean, there are some alternatives such as:  if(jQuery.type(new Boolean()) === jQuery.type(variable))       //Do something..   But that doesn't seem pretty to me.  Is there a cleaner...
For example, I've made a JavaScript library called lowclass and I'm wondering how to make it work in the TypeScript type system.  The library lets us define a class by passing in an object-literal into the API, like the following, and I'm...
The MDN said :   Six data types that are primitives:   Boolean  Null  Undefined  Number  String  Symbol (new in ECMAScript 6)  and Object   But I confused, the function data type and object data type.   Let's see :   var func = function() {...
Suppose you are creating the data type and expose its behavior.   Can you give some examples of when would you use:   a function & new:  // define new data type var CustomDataType= function(){                        this.a='whatever';...

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