JS of learning notes -- split(), replace(), join()

Recently used split() This function , Suddenly, it feels very convenient

string.split(separator,limit)

Parameters 1： Optional . String or regular expression , Split from where specified by this parameter string Object.

Parameters 2： Optional . This parameter specifies the maximum length of the returned array . If this parameter is set , No more substrings will be returned than the array specified by this parameter . If the parameter is not set , The entire string will be split , Regardless of its length .

Returns an array of strings .

Take a chestnut ：

Break this sentence down into words one by one ,

var str="How are you doing today?";

In this case, a space can be passed in ,
var n=str.split(" ");

n That's what it looks like ：

n=[ 'How' , 'are' , 'you' , 'doing' , 'today?' ]

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replace() Method is used to replace some characters with others in a string , Or replace a substring that matches a regular expression .

string.replace(searchvalue,newvalue)

Parameters 1： Mandatory , Replaced string

Parameters 2： Mandatory , Replace string

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join() Method is used to convert all elements in the array into a string .

The elements are separated by the specified separator .

array.join(separator)

Parameters can be chosen . Specifies the separator to use . If this parameter is omitted , Then use comma as separator .