doc

Runtime documentation tool for REPL.

Usage

Have you ever wished you could see docs for the given function right out of the REPL? If so, this tool is for you!

var doc = require('doc').doc
doc(doc) // Prints following output:

/*
function doc(source) { ... }
-----------------------------------------------
Prints documentanion of the given function
*/

// You can also document your own functions:

function compose() {
  doc: "Returns the composition of a list of functions, where each function"
     | "consumes the return value of the function that follows. In math"
     | "terms, composing the functions `f()`, `g()`, and `h()` produces"
     | "`f(g(h()))`."
     | "Usage:"
     | "var greet = function(name) { return 'hi: ' + name }"
     | "var exclaim = function(statement) { return statement + '!' }"
     | "var welcome = compose(exclaim, greet)"
     | "welcome('moe')"
     | "//> 'hi: moe!'"

  var funcs = Array.prototype.slice.call(arguments)
  return function composed() {
    var args = slice.call(arguments)
    var i = funcs.length
    while (0 <= --i) args = [ funcs[i].apply(this, args) ]
    return args[0]
  }
}

doc(compose) // Prints following output:

/*
function compose() { ... }
-----------------------------------------------
Returns the composition of a list of functions, where each function
consumes the return value of the function that follows. In math
terms, composing the functions `f()`, `g()`, and `h()` produces
`f(g(h()))`.
Usage:
var greet = function(name) { return 'hi: ' + name }
var exclaim = function(statement) { return statement + '!' }
var welcome = compose(exclaim, greet)
welcome('moe')
//> 'hi: moe!'
*/

// Alternative way to documenting functions (Not cross platform though):

function sum(a, b) {
  /**
  Takes arbitary number of arguments and returns their sum.
  Usage:
  sum(7, 2, 8) //> 17
  **/

  var count = arguments.length, index = 0, value = 0
  while (index < count) value += arguments[index++]
  return value
}

doc(sum) // Prints following output:

/*
function sum(a, b) { ... }
-----------------------------------------------
Takes arbitary number of arguments and returns their sum.
Usage:
sum(7, 2, 8) //> 17
*/

Install

npm install doc