The keyword const is a little misleading. Note: map() does not execute the function for array Why do the guys at Angular care to deliver a .js.map file? The keys in Map are ordered in a simple, straightforward way: A Map object iterates entries, keys, and values in the order of entry insertion. Accéder aux paramètres de votre navigateur. In a block body, you must use an explicit return statement. Published Mar 02, 2018. The iterator function passed to forEach receives a key / value pair on every iteration. JavaScript possède plusieurs fonctions natives, disponibles au plus haut niveau : eval() La fonction eval() permet d'évaluer du code JavaScript contenu dans une chaîne de caractères. ES2015 introduced two important new JavaScript keywords: let and const. Google Maps created before this date are grandfathered in and do not require an API key. Object to Map. Grandfathered Google Maps will continue to work without a key for the near future. The Google Map block allows you to embed a Google Maps map in your page. JavaScript is now disabled. Keys and Values can be object references or primitive types. The do/while statement creates a loop that executes a block of code once, before checking if the condition is true, then it will repeat the loop as long as the condition is true. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. Instead of compiling from a source language to machine code, it compiles from JavaScript to better JavaScript. In this post, we are going to look at how to overlay images on top of the Bing Maps V7 AJAX and Windows Store JavaScript controls. const PI; PI = 3.14159265359; Correct. (for-in includes only enumerable string-keyed properties; Object.keys includes only own, enumerable, string-keyed properties; Object.getOwnPropertyNames includes own, string-keyed properties even if non-enumerable; Object.getOwnPropertySymbols does the same for just Symbol-keyed properties, etc.). Note: The above map with default options is in an