Chainable formatters

formatters.js

"use strict";

/*
Chainable formatters

Usage:

function trim(value) {
  return value.trim();
}

function append(str) {
  return function(value) {
    return value + str;
  }
}

f(' foo ').p(trim).p(append('bar')).exec(); > foobar

or with lazy rendering

var chain = f().p(trim).p(append('bar'));
chain.exec(' foo '); > foobar
chain.exec(' baz '); > bazbar;
 */

function f(value) {
  this.value = value || null;
}

f.prototype = new Array();

// create aliases for native push method
f.prototype.pipe = f.prototype.p = Array.prototype.push;

// add execute method
f.prototype.e = f.prototype.exec = function(value) {
  return this.reduce(function(prev, curr, index) {
   return curr(prev);
  }, value || this.value || null);
};

module.exports = function(value) {
  return new f(value);
};