Zhiye Li zhiyelee

common used phrases

AFAIK == as far as I know
IMO == in my opinion
IMHO == in my humble opinion
LGTM == look good to me
AKA == also know as
ASAP == as sone as possible
BTW == by the way
FAQ == frequently asked questions

When is it appropriate to use CRC for error detection versus more modern hashing functions such as MD5 or SHA1? Is the former easier to implement on embedded hardware?

http://stackoverflow.com/questions/996843/when-is-crc-more-appropriate-to-use-than-md5-sha1

by @defines http://stackoverflow.com/a/996873/775783
CRC works fine for detecting random errors in data that might occur, for example, from network interference, line noise, distortion, etc.

CRC is computationally much less complex than MD5 or SHA1. Using a hash function like MD5 is probably overkill for random error detection. However, using CRC for any kind of security check would be much less secure than a more complex hashing function such as MD5.

Introduction to the YUI Test

View gists in a more grace page.

Usage

visit http://g.zhiye.li/:gistid to view the gist, eg

// for below gitst 
https://gist.github.com/zhiyelee/9403314

yui oop demo gist

merge mix
OOP
- extend
- augment
- aggregate
bind rbind

	// http://codeforces.com/contest/236/problem/A
	function judge(str) {
	var arr = str.split('');
	var obj = {};
	var len = 0;

	for (var i = 0; i < arr.length; i++) {
	if (!obj[arr[i]]) {
	obj[arr[i]] = 1;
	len ++;

	<!DOCTYPE html>
	<html>
	<head>
	<meta name="description" content="instanceof cross iframe" />
	<meta charset="utf-8">
	<title>instanceof cross iframe</title>
	</head>
	<body>
	<iframe id="fr" ></iframe>

	var animal = { eats: true }
	var rabbit = { jumps: true }

	rabbit.__proto__ = animal // inherit

	console.log(rabbit.eats) // true

	var animal = { eats: true }
	rabbit = Object.create(animal);

	/**
	* @description check dot whether in a triangle
	* @author zhiyelee
	*/

	/**
	* for tri like below:
	* A
	* * *
	* B * * * C