Use js to replace character replace () in a string

Source: Internet
Author: User

In js, we can use replace () to replace the characters, numbers, or letters in the string, or replace () with regular expressions, below I will introduce some common methods of character replacement.

For example

The Code is as follows:

Var str = "are all men? Isn't it! ";
Str = str. replace ');
Alert (str );

In the above Code, only the first "?" is replaced, and the output is "Everyone is a man, isn't it! ", Hey

If you want to replace all the content in the string that meets the conditions, it is good to replace it with a regular expression. The following code can replace all

The Code is as follows:

Var str = 'are all men? Isn't it? ';
Str = str. replace (/?/g, well ');
Alert (str );

In this way, we will output "Everyone is a man, isn't it? ", All the content that meets the condition is replaced. Note that the regular expression/?/g indicates g, which indicates global, if this configuration item is not set, it will not be completely replaced.


The Code is as follows:

<Script type = "text/javascript">
Var str = "www. bKjia. c0paa"
Document. write (str. replace (/aa/, ") // The output result is www. bKjia. c0m.


The Code is as follows:

// Make sure that the word "javascript" is in the correct case.
Text. replace (/javascript/I, 'javascript ');
// Replace all double quotation marks with the correct single quotation marks
Text. replace (/"([^"]) "/g," ''$1 ''");
// Convert a separate name from the format "Mack, Xu" to "Xu Mack"
Name. replace (/(w +) s *, s * (w +)/, "$2 $1 ");
// Capital the first letter of all words in a string
Text. replace (/bw + B/g, function (word ){
Return word. substring (0, 1). toUpperCase () + word. substring (1 );

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