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This article mainly explains how javascript can improve the efficiency and performance of string concatenation. Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how javascript can improve the efficiency and performance of string concatenation.

/ * use the Array object join method to simulate StringBuilder in C # to improve the efficiency and performance of string stitching in JS. The function is the same as the StringBuilder.js file under the JS folder. Because of the different implementation methods and in order to avoid conflicts, this file is placed under this folder for the monthly funding plan to use Author: panwb Date: 2012-11-29*/function StringBuilder (str) {/ / string array this.arrstr = (str = = undefined? New Array (): new Array (str.toString ()); / / string length (any method that affects newstr string length must also reset length) this.length = (str = undefined? 0: str.length); / / string template conversion, similar to the StringBuilder.Append method this.append = StringBuilder_append in C# / / string template conversion, similar to the StringBuilder.AppendFormat method this.appendFormat = StringBuilder_appendFormat; / / rewrite toString () method this.toString = StringBuilder_toString; / / rewrite replace () method this.replace = StringBuilder_replace; / / add remove () method this.remove = StringBuilder_remove; / / remove all characters this.clear = StringBuilder_clear from the current instance } / / string template conversion, similar to the StringBuilder.Append method function StringBuilder_append (f) {if (f = undefined | | f = null) {return this;} this.arrstr.push (f) in C #; this.length + = f. Duration; return this } / / string template conversion, which is similar to the StringBuilder.AppendFormat method function StringBuilder_appendFormat (f) {if (f = undefined | | f = null) {return this;} / / stores parameters in C #, so that the parameter var params = arguments passed by calling this method cannot be obtained in the replace callback function Var newstr = f.toString () .replace (/\ {(\ d +)\} / g, function (I, h) {return params [parseInt (h, 10) + 1];}); this.arrstr.push (newstr); this.length + = newstr.length; return this;} / / override the toString () method function StringBuilder_toString () {return this.arrstr.join ('') } / / re-replace () method function StringBuilder_replace () {if (arguments.length > = 1) {var newstr = this.arrstr.join ('') .replace (arguments [0], arguments [1]); this.arrstr.length = 0; this.length = newstr.length; this.arrstr.push (newstr);} return this } / / add remove () method function StringBuilder_remove () {if (arguments.length > 0) {var oldstr = this.arrstr.join (''); var substr = (arguments.length > = 2? Oldstr.substring (arguments [0], arguments [1]): oldstr.substring (arguments [0]); var newstr = oldstr.replace (substr, ""); this.arrstr.length = 0; this.length = newstr.length; this.arrstr.push (newstr);} return this;} / / remove all characters function StringBuilder_clear () {this.arrstr.length = 0; this.length = 0 from the current instance Return this;} at this point, I believe you have a deeper understanding of "how javascript improves the efficiency and performance of string concatenation". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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