首页 / 脚本样式 / JavaScript / js实现C#的StringBuilder效果完整实例

/*##################### DO NOT MODIFY THIS HEADER ###################### Title: StringBuilder Class## Description: Simulates the C# StringBuilder Class in Javascript. ## Author: Adam Smith## Email: ibulwark@hotmail.com## Date: November 12, 2006######################################################################*/// Simulates the C# StringBuilder Class in Javascript.// Parameter["stringToAdd"] - The string to add. StringBuilder = function（stringToAdd）{var h = new Array（）;if（stringToAdd）{h[0] = stringToAdd;} this.Append = Append;this.AppendLine = AppendLine;this.ToString = ToString;this.Clear = Clear;this.Length = Length;this.Replace = Replace;this.Remove = Remove;this.Insert = Insert;this.GetType = GetType; // Appends the string representation of a specified object to the end of this instance.// Parameter["stringToAppend"] - The string to append. function Append（stringToAppend）{h[h.length] = stringToAppend;} // Appends the string representation of a specified object to the end of this instance with a carriage return and line feed.// Parameter["stringToAppend"] - The string to append. function AppendLine（stringToAppend）{h[h.length] = stringToAppend;h[h.length] = "
";} // Converts a StringBuilder to a String.function ToString（）{if（！h）{ return ""; }if（h.length<2）{ return （h[0]）?h[0]:""; }var a = h.join（""）;h = new Array（）;h[0] = a;return a;}// Clears the StringBuilderfunction Clear（）{h = new Array（）;}// Gets the StringBuilder Lengthfunction Length（）{if（！h）{return 0;}if（h.length<2）{ return （h[0]）?h[0].length:0; }var a = h.join（""）;h = new Array（）;h[0] = a;return a.length;}// Replaces all occurrences of a specified character or string in this instance with another specified character or string.// Parameter["oldValue"] - The string to replace. // Parameter["newValue"] - The string that replaces oldValue. // Parameter["caseSensitive"] - True or false for case replace.// Return Value - A reference to this instance with all instances of oldValue replaced by newValue.function Replace（oldValue, newValue, caseSensitive）{var r = new RegExp（oldValue,（caseSensitive==true）?"g":"gi"）;var b = h.join（""）.replace（r, newValue）;h = new Array（）;h[0] = b;return this;}// Removes the specified range of characters from this instance.// Parameter["startIndex"] - The position where removal begins. // Parameter["length"] - The number of characters to remove.// Return Value - A reference to this instance after the excise operation has occurred.function Remove（startIndex, length）{var s = h.join（""）;h = new Array（）;if（startIndex<1）{h[0]=s.substring（length, s.length）;}if（startIndex>s.length）{h[0]=s;}else{h[0]=s.substring（0, startIndex）; h[1]=s.substring（startIndex+length, s.length）;}return this;}// Inserts the string representation of a specified object into this instance at a specified character position.// Parameter["index"] - The position at which to insert.// Parameter["value"] - The string to insert. // Return Value - A reference to this instance after the insert operation has occurred.function Insert（index, value）{var s = h.join（""）;h = new Array（）;if（index<1）{h[0]=value; h[1]=s;}if（index>=s.length）{h[0]=s; h[1]=value;}else{h[0]=s.substring（0, index）; h[1]=value; h[2]=s.substring（index, s.length）;}return this;}// Gets the typefunction GetType（）{return "StringBuilder";}};