wenzhixin

function pad(len, num) {
    return (new Array(len + 1).join('0') + num).slice(-len);
}

pad(2, 1); // 01
pad(2, 11); // 11

pad(10, 12345); // 0000012345
pad(10, 12345678); // 0012345678
pad(10, 1234567890); // 1234567890

wenzhixin

/**
 * @author zhixin wen <wenzhixin2010@gmail.com>
 * @version 0.0.1
 * @github https://github.com/wenzhixin/
 * @blog http://wenzhixin.net.cn
 */
 
(function($) {
                        
        'use strict';

wenzhixin

function getSize(value) {
	var b1 = Math.pow(2, 10), //KB
		b2 = Math.pow(2, 20), //MB
		b3 = Math.pow(2, 30), //GB
		b4 = Math.pow(2, 40), //TB
		value = value.toLowerCase(), 
		size = parseFloat(value);
		
	if (!size) {
		return 0;

wenzhixin

function parse(search) {
	var query = {}, 
		params = search.substring(1).split('&');
	for (var i = 0, l = params.length; i < l; i++) {
		var p = params[i].split('=');
		query[p[0]] = p[1] || '';
	}
	return query;
}

wenzhixin

/**
 * var u = url('http://wenzhixin.net.cn:12345/test?name=wenzhixin#about');
 * console.log(u.protocol); // http:
 * console.log(u.hostname); // wenzhixin.net.cn
 * console.log(u.port); // 12345
 * console.log(u.pathname); // /test
 * console.log(u.search); // ?name=wenzhixin
 * console.log(u.hash); // #about
 */
function url(href) {

wenzhixin

function timer(func, start, interval, end) {
	start = start || 0;
	if (arguments.length <= 2) {
		setTimeout(func, start);
	} else {
		var repeat = function() {
			var i = setInterval(func, interval);
			end && setTimeout(function() {
				clearInterval(i);
			}, end);

wenzhixin

var fs = require('fs'),
	MongoClient = require('mongodb').MongoClient,
	Server = require('mongodb').Server,

	options = null;
	mongoClient = null;

if (process.argv.length <= 2 || process.argv.indexOf('--help') !== -1) {
	showHelp();
	return;