javascript StringBuilder class implementation_javascript skills

Copy code The code is as follows:

// Initializes a new instance of the StringBuilder class
// and appends the given value if supplied
function StringBuilder(value)
{
this.strings = new Array("");
this.append(value);
}
// Appends the given value to the end of this instance.
StringBuilder.prototype.append = function (value)
{
if (value)
{
this.strings .push(value);
}
}

// Clears the string buffer

StringBuilder.prototype.clear = function ()
{
this. strings.length = 1;
}

// Converts this instance to a String.
StringBuilder.prototype.toString = function ()
{
return this.strings.join ("");
}

The code looks simple and straightforward. In fact, it is implemented using array, push, join, etc. The following is how to use this class

Copy the code The code is as follows:

// create a StringBuilder
var sb = new StringBuilder();
// append some text
sb.append("Some of those preparing for international ");
sb.append("exams such as the TOEFL ");
sb.append("need extra practice for the listening section");
// get the full string value
var s = sb. toString();
alert(s);

is very simple and does not require much explanation. If you have used StringBuilder in .NET, you will also know how to use it here.