String format with {0} - Node.js String

Node.js examples for String:Format

  1. HOME
  2. Node.js
  3. String
  4. Format

Description

String format with {0}

Demo Code

// from http://www.codeproject.com/Tips/201899/String-Format-in-JavaScript
String.prototype.format = function (args) {
    var str = this;
    return str.replace(String.prototype.format.regex, function(item) {
        var intVal = parseInt(item.substring(1, item.length - 1));
        var replace;
        if (intVal >= 0) {
            replace = args[intVal];/*from   w  ww  .  j  a v a2s  . c  om*/
        } else if (intVal === -1) {
            replace = "{";
        } else if (intVal === -2) {
            replace = "}";
        } else {
            replace = "";
        }
        return replace;
    });
};
String.prototype.format.regex = new RegExp("{-?[0-9]+}", "g");

/* Sample usage.
var str = "She {1} {0}{2} by the {0}{3}. {-1}^_^{-2}";
str = str.format(["sea", "sells", "shells", "shore"]);
alert(str); */

Related Tutorials