node.js core modules 核心模组 the modules do need to u npm install

the modules installed locally with you install node js

1. path module

load:

var path = require(“path”)

using:

path.baname(__filename) # pluck out the file name from the path

path.join(*args) join a ries of path name with “/”

2. utilie module

var util = require(“util)

util.log() have a same result as console.log(), but it has log the time of the code loading time staple

//++++++++++++++

util.inherits(object1, ob2)

help ob1 to inherits all of function in ob2

3. v8

get current memory

var v8 = require(“v8”)

util.log(v8.getheapstatistics())

4. reading module

ask question to ur in termial and saving tho answers

var写景诗句 readline = require('readline')v面子问题ar rl = readline.createinterf马奔腾ace(process.stdin, proce枣庄大学ss.stout)# readline helps us to control thoes objectrl.question(string, function(answer))# ask question# handle the answer

rl.tprompt宁波九龙湖(”);

in the question() function to repeat the question prompt

5. eventemitter

require(‘events’);

var emitter = new events.eventemitter();

emitter.on(‘customevent’, function(string));

emitter.emit(‘customevent’, string1)

emit will push the cond argument into customevent and run it! \