cuipengfei

function repeat(operation, num) {
    if (num <= 0) {
        return num
    }
    else {
        operation()
        num--
        return num
    }
}

cuipengfei

  function repeat(operation, num) {
    if (num <= 0) return

    operation()

    // release control every 10 or so
    // iterations.
    // 10 is arbitrary.
    if (num % 10 === 0) {
      setTimeout(function() {

cuipengfei

  function Spy(target, method) {
    var originalFunction = target[method]
    var result = {
      count: 0
    }

    target[method] = function() {
      result.count++
      return originalFunction.apply(target, arguments)
    }

cuipengfei

module.exports = function arrayMap(arr, fn) {
    return arr.reduce(function (acc, current) {
        acc.push(fn(current))
        return acc
    }, [])
}

cuipengfei

  module.exports = function(namespace) {
    return console.log.bind(console, namespace)
  }

cuipengfei

  function duckCount() {
    return Array.prototype.slice.call(arguments).filter(function(obj) {
      return Object.prototype.hasOwnProperty.call(obj, 'quack')
    }).length
  }

  module.exports = duckCount

cuipengfei

module.exports = function reduce(arr, fn, initial) {
	function justDoOne(index, value) {
		if (index >= arr.length) {
			return value
		}
		return justDoOne(index + 1, fn(value, arr[index]))
	}
	
	return justDoOne(0, initial)
}

cuipengfei

module.exports = function countWords(arr) {
	return arr.reduce(function(prev, curr) {
		prev[curr] = prev[curr] + 1 || 1
		return prev
	}, {})
}

cuipengfei

var express = require('express')
var fs = require('fs')

var app = express()

app.get('/books', function (req, res) {
    fs.readFile(process.argv[3], function (err, data) {
        var jsonFromFile = JSON.parse(data.toString());
        res.json(jsonFromFile)
    })

cuipengfei

var express = require('express')
var app = express()

app.get('/search', function (req, res) {
    res.send(req.query)
})

app.listen(process.argv[2])