JavaScript object literal length === undefined?
This is supported in node.js and newer environments. var obj = {a: “a”, b: “b”}; Object.keys(obj).length // 2
object-literal
What is the call signature of an object literal type and how can they be used with generic types?
Functions can have properties, that’s what the object literal syntax is for: it allows to define a call signature and additional properties. Your two examples are equivalent because the second doesn’t define additional properties on the object literal. You can read more on that in the section on hybrid types. Additionally, the object literal allows …
Call functions from function inside an object (object literal)
That code is only a declaration. You need to actually call the function: RunApp.init(); Demo: http://jsfiddle.net/mattball/s6MJ5/
Use a concatenated (dynamic) string as JavaScript object key? [duplicate]
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” …
Are object literals Pythonic?
Why not just use a dictionary? p = {‘name’: ‘John Smith’, ‘age’: 23} print p print p[‘name’] print p[‘age’]
Adding Prototype to JavaScript Object Literal
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() { …
How to fill a Javascript object literal with many static key/value pairs efficiently?
In ES2015 a.k.a ES6 version of JavaScript, a new datatype called Map is introduced. let map = new Map([[“key1”, “value1”], [“key2”, “value2”]]); map.get(“key1”); // => value1 check this reference for more info.
Javascript ‘colon’ for labeling anonymous functions?
You are missing some code there, but I assume its part of an object declaration like this: var obj = { queryString: function() { //some code } }; obj.queryString(); It assigns a function as a property of an object literal. It would be equivalent to this: var obj = {}; obj.queryString = function() { … …
PHP object literal
As BoltClock mentioned there is no object literal in PHP however you can do this by simply type casting the arrays to objects: $testArray = array( (object)array(“name” => “John”, “hobby” => “hiking”), (object)array(“name” => “Jane”, “hobby” => “dancing”) ); echo “Person 1 Name: “.$testArray[0]->name; echo “Person 2 Hobby: “.$testArray[1]->hobby;
Dynamically Add Variable Name Value Pairs to JSON Object
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 = { …