Simple Example of jQuery extend

Copy codeThe Code is as follows:
JQuery. extend = jQuery. fn. extend = function (){
Var options, name, src, copy, copyIsArray, clone,
Target = arguments [0] | | {},
I = 1,
Length = arguments. length,
Deep = false;

// Handle a deep copy situation
If (typeof target = "boolean "){
Deep = target;
Target = arguments [1] || {};
// Skip the boolean and the target
I = 2;
}

// Handle case when target is a string or something (possible in deep copy)
If (typeof target! = "Object "&&! JQuery. isFunction (target )){
Target = {};
}

// Extend jQuery itself if only one argument is passed
If (length = I ){
Target = this;
-- I;
}

For (; I <length; I ++ ){
// Only deal with non-null/undefined values
If (options = arguments [I])! = Null ){
// Extend the base object
For (name in options ){
Src = target [name];
Copy = options [name];

// Prevent never-ending loop
If (target = copy ){
Continue;
}

// Recurse if we're merging plain objects or arrays
If (deep & copy & (jQuery. isPlainObject (copy) | (copyIsArray = jQuery. isArray (copy )))){
If (copyIsArray ){
CopyIsArray = false;
Clone = src & jQuery. isArray (src )? Src: [];

} Else {
Clone = src & jQuery. isPlainObject (src )? Src :{};
}

// Never move original objects, clone them
Target [name] = jQuery. extend (deep, clone, copy );

// Don't bring in undefined values
} Else if (copy! = Undefined ){
Target [name] = copy;
}
}
}
}

// Return the modified object
Return target;
};