About JavaScript function objects those obfuscation analysis _js object-oriented

The function object in JS is a fascinating thing, but because he is too flexible and often confusing, I post some code:

Most people have this shorthand:

Copy Code code as follows:

function Test () {}

The whole book of the Jsvascript language:

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var test = function () {}

Functions can run immediately and assign values:

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var test = function () {} ()//test = = undefined
var test2 = function () {return ' Sugar Pie '} ()//Test2 = = ' Sugar Pie '

But the function shorthand does not run directly, the following code will complain:

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function Test () {} ()//Syntaxerror:syntax Error

Normal after wrapping with the "()" Run:

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(function Test () {}) ();

In fact, this function name test has no meaning, the removal of the anonymous function, can still automatically execute the function in vivo code, commonly used to write anonymous functions:

Copy Code code as follows:

(function () {}) ();

Anonymous functions can also be said to be "beautiful" point:

Copy Code code as follows:

(function () {} ());

See this, just contact JS brother is it going crazy? I have seen my project to engage in C-language cab, I saw the anonymous function immediately after the petrochemical ...