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Тема в разделе "Другие языки", создана пользователем Juan2000, 27 янв 2011.

Модераторы: Цукер
  1. Juan2000

    Juan2000 Создатель

    10 окт 2008
    Although you now have a functioning map, you’re not quite done. You are currently cluttering the global
    namespace with all your variables. This might not be a big deal in a simple web page like the one you’re
    currently working on. But if you’re constructing a map that will be part of a bigger project, using global
    variables can turn out to be a big problem. The problem that can arise is that naming collisions between
    conflicting code occur. It’s therefore important to contain your code so that you isolate it from the
    outside world.

    To make sure that your code doesn’t clutter the global namespace, you will encapsulate it inside a
    self-executing anonymous function. The pattern looks like this:

    (function() {
    // The code

    It might look a bit odd, but it’s really quite clever. First, an anonymous function looks like function() {
    }. By encapsulating it inside a set of parentheses, you return the function to the rest of the code. The
    parentheses at the end immediately execute the function, which means that the code inside will run
    immediately but will be invisible to all code outside it.
    It might be easier to understand if you add an argument to the function:

    (function(message) {
    })('Hello Google Maps lovers');

    Поясните, пожалуйста.
  2. Mr.Emm

    Mr.Emm Постоялец

    5 май 2008
    1) Анонимная функция, с предотвращением засорения глобального пространства имен, т.е. все переменные что внутри не существуют снаружи;
    2) Объявляем функцию и сразу же исполняем ее с передачей строки в качестве параметра