JS Implementation ReplaceAll

Need to replace multiple double-quotes inside the string, no nonsense, directly on the code:

var filePath = ' D:/IMG/1.JGP '; filePath = Filepath.replace (New RegExp (/(")/g)," ");

Results after substitution:

<pre name= "Code" class= "JavaScript" >D:/IMG/1.JGP

The Replace function is also available:

JavaScript Replace () method

JavaScript String Object

Defining and Using methods

The replace () method is used to replace some characters in a string with some characters, or to replace a substring that matches a regular table.

Grammar

Stringobject.replace (regexp/substr,replacement)

number of references	Descriptive narrative
regexp/substr	required. The Specifies the substring or RegExp object of the pattern to replace. Notice that the value is assumed to be a string. It is used as the direct volume text pattern to be retrieved, instead of being converted to the RegExp object first.
Replacement	Necessary. A string value. A function that specifies replacement text or generates alternate text.

return value

A new string that is obtained after the first match or all matches of regexp have been replaced with replacement .

Description

The replace () method of the string Stringobject runs a find-and-replace operation. It looks for substrings in Stringobject that match regexp, and then replaces them with replacement . Assume that RegExp has the global flag G. Then the replace () method replaces all of the matched substrings. Otherwise. It simply replaces the first matching substring.

A replacement can be a string, or it can be a function. Suppose it is a string. Then each match will be replaced by a string.

However, the $ character in replacement has a specific meaning. For example, see the following table. It shows that the resulting string from the pattern match will be used for substitution.

character	Replace text
$, $ 、...、	The text that matches the 1th to 99th sub-expression in RegExp.
$&	A substring that matches the regexp.
$`	The text at the left side of the matching substring.
$	The text at the right side of the matching substring.
$$	Direct volume symbol.

Note: ECMAScript v3 stipulates that the parameter of the replace () method replacement can be a function rather than a string. In this case, each match calls the function, and the string it returns is used as the replacement text. The first parameter of the function is a string that matches the pattern. The next parameter is a string that matches the subexpression in the pattern and can have 0 or more of these parameters.

The next parameter is an integer that declares where the match appears in the Stringobject. The last parameter is the stringobject itself.

Example Sample 1

In this example. We will replace "Microsoft" in the string with "W3school":

<script type= "Text/javascript" >var str= "Visit microsoft!" document.write ( str.replace(/Microsoft/, "W3School") ) </script>

Output:

Visit w3school!

Example 2

In this case, we will run a global substitution. Whenever "Microsoft" is found. It is replaced with "W3school":

<script type= "Text/javascript" >var str= "Welcome to microsoft! "Str=str +" We are proud to announce that Microsoft have "Str=str +" one of the largest WEB developers sites in the world. " document.write ( str.replace(/Microsoft/g, "W3School") ) </script>

Output:

Welcome to w3school! We is proud to announce this W3schoolhas one of the largest WEB developers sites in the world.

Example 3

You can use the code provided in this example to ensure the correct matching string uppercase characters:

Text = "JavaScript Tutorial"; Text.replace (/javascript/i, "JavaScript");

Example 4

In this example. We will convert "Doe, John" to the form of "John Doe":

Name = "Doe, John"; Name.replace (/(\w+) \s*, \s* (\w+)/, "$ $");

Example 5

In this example, we will replace all the flower quotes with the direct arguments:

name = ' A ', "B" '; Name.replace (/"([^"]*) "/g," ' $ ' ");

Example 6

In this example. We will convert all of the words in the string to uppercase in the first letter:

Name = ' aaa bbb ' CCC '; Uw=name.replace (/\b\w+\b/g, function (word) {  return word.substring (0,1). toUpperCase () + Word.substring (1);}  );

Tiy

Replace () 1

How to replace characters in a string with replace ().

Replace () 2-Global Search

How to use replace () for global substitution.

Replace () 3-non-sensitive search for uppercase and lowercase

How to use replace () to ensure that uppercase letters are correct.

Replace () 4

How to use replace () to convert the name format.

Replace () 5

How to use replace () to convert an argument.

Replace () 6

How to use replace () to convert the first letter of a word to uppercase.

JS Implementation ReplaceAll