JS Basic article--replace Replace all the correct application

General use

var str = "Test-test-test"= "Test-test-test". Replace ("Test", "OK"); Console.log (str);

Use the Regular:

var str = "Test-test-test"= "Test-test-test". Replace (/test/g, "OK"); Console.log (str);

Loop Replace

In this case, the substitution of emoticons, we need a normal string substitution, for example with the while + INDEXOF implementation.

varfaces = {  "/::)": "Weixiao",  "/::~": "Pizui",  "/::b": "Se",  "/::|": "Fadai",  "/:8-"): "Deyi",  "/::<": "Liulei",  "/::$": "Haixiu",  "/:: ' (": "Daku",  "/::-|": "Gangga"};varstr = "/::)-/::b-/::)-/:8-)-/:8-)"; for(varKinchfaces) {   while(Str.indexof (k) >-1) {str=str.replace (k, faces[k]); }}console.log (str);

In this way, the basic skills can be achieved, but this is problematic, if there is a key value of the same, it will die loop for example:

var faces = {  "/::)": "Weixiao",  "/:hehe": "/:hehe"}; var str = "/::)-/::b-/:hehe-/:8-)-/:8-)";  for (var in faces) {  while (Str.indexof (k) >-1) {    = str.replace (k, faces[k]);}  } Console.log (str);

Modify the following code to resolve the dead loop problem:

varfaces = {  "/::)": "Weixiao",  "/:hehe": "/:hehe"};varstr = "/::)-/::b-/:hehe-/:8-)-/:8-)"; for(varKinchfaces) {  varp =-1;//where characters appear  vars = 0;//Next start position   while(P = Str.indexof (k, s)) >-1) {s= p + faces[k].length;//position + length of valuestr =str.replace (k, faces[k]); }}console.log (str);

Then simply encapsulate:

/** * String substitution * @param {string} str to be replaced by String * @param {string} substr string to replace * @param {string} newstr string to replace * @r Eturn the new string after the {string} substitution*/functionreplace (str, substr, newstr) {varp =-1;//where characters appear  vars = 0;//Next start position   while(P = str.indexof (substr, s)) >-1) {s= p + newstr.length;//position + length of valuestr =str.replace (substr, NEWSTR); }  returnstr;} Console.log (replace ("Ssssss", "SS", "S"));//SSS

Using the RegExp Package

 /*  * * string substitution * @param {string} str string to be replaced * @ param {String} substr the string to replace * @param {string} newstr the string to replace * @return {string} after the replacement of the new string  */ function   replace (str, substr, NEWSTR {substr  = Substr.replace (/[.\\[\]{} () |^$?*+]/g, "\\$&"); //   metacharacters  in the escaped string var  re = new  RegExp (substr, "G"); //   generate regular  return   Str.replace (re, NEWSTR);} Console.log (replace ( "Ssssss", "SS", "S")); //  SSS  

Reference Address: http://www.52cik.com/2015/11/06/replace-all.html

JS Basic article--replace Replace all the correct application