Supplemental $.extend ()

Thanks for the reminder of a child's shoes! Say my last essay. jquery plug-in development of the way one can also be used for merging parameters and deep clone, although the way to do a method of a combination of parameters, but not described in detail, so today do a bit of a supplement here!

first, merging parameters

The Extend extension prototype for jquery is:

Extend (arg,arg1,arg2,......);

return value not arg1,arg2 ... Merge to Arg. There are two ways to use it.

• Omit the arg parameter, then arg1,arg2 ... Returns after merging, such as:

var results=$.extend ({name: ' Nick '},{sex: ' Handsome '});//Then the return value is results={name: ' Nick ', Sex: ' Handsome '}, custom arg parameter, The arg of the custom type is returned. For example://defines ARG as an object var results=$.extend ({},{name: ' Nick '},{sex: ' Handsome '});//Then, the return value is arg object results={name: ' Nick ', sex: The ' handsome '};//here defines arg as an array var results=$.extend ([],{name: ' Nick '},{sex: ' Handsome '});//Then, the return value is the arg array results=[name: ' Nick ', Sex: ' Handsome '];

Attention:
When merging parameters, if the attribute name of the parameter in $.extend () conflicts, the following value replaces the previous value. Such as:

This defines arg as an object var results=$.extend ({},{name: ' Nick ', Sex: ' Male '},{sex: ' Handsome '});//Then, the return value is the Arg object. Sex attribute conflicts, the following value handsome replace Maleresults={name: ' Nick ', Sex: ' Handsome '};

Second, clone

The Extend clone of jquery is:

$.extend (Boolean,arg,arg1,arg2 ...);

• When Boolean is true, deep clone:

var results=$.extend (true,{},{user:{name: ' Nick ', Love: ' Money '},age:25},{user:{name: ' Summer ', like: ' Car '},sex: ' Handsome '});//return value results={"user": {"name": "Summer", "Love": "Money", "like": "Car"}, "age": "Sex": "Handsome"};

• 　　When the Boolean is False (default):

var results=$.extend (false,{},{user:{name: ' Nick ', Love: ' Money '},age:25},{user:{name: ' Summer ', like: ' Car '},sex: ' Handsome '});//return value results={"user": {"name": "Summer", "like": "Car"}, "age": "Sex": "Handsome"};

Have you noticed, dear? Take a good look at the return value!
Attention:

• It is best to set the Boolean to True when $.extend () is used for clone.
• Since earlier versions of jquery had only shallow clones, but later versions were fixed, use the jquery CDN as much as possible with the higher version.

Supplemental $.extend ()