Does JavaScript have a built in stringbuilder class?

Question

I see a few code project solutions.

But is there a regular implementation in JavaScript?

Answer 1

In C# you can do something like

 String.Format("hello {0}, your age is {1}.",  "John",  29) 

In JavaScript you could do something like

 var x = "hello {0}, your age is {1}";
 x = x.replace(/\{0\}/g, "John");
 x = x.replace(/\{1\}/g, 29);

Answer 2

For those interested, here's an alternative to invoking Array.join:

var arrayOfStrings = ['foo', 'bar'];
var result = String.concat.apply(null, arrayOfStrings);
console.log(result);

The output, as expected, is the string 'foobar'. In Firefox, this approach outperforms Array.join but is outperformed by + concatenation. Since String.concat requires each segment to be specified as a separate argument, the caller is limited by any argument count limit imposed by the executing JavaScript engine. Take a look at the documentation of Function.prototype.apply() for more information.

Answer 3

How about sys.StringBuilder() try the following article.

https://msdn.microsoft.com/en-us/library/bb310852.aspx

Answer 4

The ECMAScript 6 version (aka ECMAScript 2015) of JavaScript introduced string literals.

var classType = "stringbuilder";
var q = `Does JavaScript have a built-in ${classType} class?`;

Notice that back-ticks, instead of single quotes, enclose the string.