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邓杰 hello2dj

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@hello2dj
hello2dj / build.sh
Created April 26, 2019 02:50 — forked from bobbytables/build.sh
Protocol Buffer build script for multiple folders
#!/usr/bin/env bash
# This script is meant to build and compile every protocolbuffer for each
# service declared in this repository (as defined by sub-directories).
# It compiles using docker containers based on Namely's protoc image
# seen here: https://github.com/namely/docker-protoc
set -e
REPOPATH=${REPOPATH-/opt/protolangs}
CURRENT_BRANCH=${CIRCLE_BRANCH-"branch-not-available"}
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hello2dj / 计算js字符串字节长度
Created September 27, 2017 03:09
/**
* 计算字符串所占的内存字节数，默认使用UTF-8的编码方式计算，也可制定为UTF-16
* UTF-8 是一种可变长度的 Unicode 编码格式，使用一至四个字节为每个字符编码
*
* 000000 - 00007F(128个代码) 0zzzzzzz(00-7F) 一个字节
* 000080 - 0007FF(1920个代码) 110yyyyy(C0-DF) 10zzzzzz(80-BF) 两个字节
* 000800 - 00D7FF
00E000 - 00FFFF(61440个代码) 1110xxxx(E0-EF) 10yyyyyy 10zzzzzz 三个字节
* 010000 - 10FFFF(1048576个代码) 11110www(F0-F7) 10xxxxxx 10yyyyyy 10zzzzzz 四个字节
*
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hello2dj / 使用bufferpool的iocopy
Created September 26, 2017 08:14
import (
"io"
"sync"
)
var bufpool *sync.Pool
func init() {
bufpool = &sync.Pool{}
bufpool.New = func() interface{} {
@hello2dj
hello2dj / 使用bufferpool的iocopy
Created September 26, 2017 08:14
import (
"io"
"sync"
)
var bufpool *sync.Pool
func init() {
bufpool = &sync.Pool{}
bufpool.New = func() interface{} {
@hello2dj
hello2dj / go-epoll-server
Created September 16, 2017 03:23 — forked from skoowoo/go-epoll-server
这是一个用 Go 基于 epoll 写的服务器程序，虽然 epoll 的实现不是很完善，还有许多细节需要改善，但此程序可以作为 Go epoll 开发的样例。这个程序也是在一个特定的需求场景下写的。
package main
import (
"bytes"
"encoding/binary"
"flag"
"io"
"log"
"os"
"runtime"
@hello2dj
hello2dj / 极简route实现
Created August 13, 2017 08:00
route实现基本原理
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>router</title>
</head>
<body>
<ul>
<li><a href="#/">turn white</a></li>
<li><a href="#/blue">turn blue</a></li>
@hello2dj
hello2dj / 移动技术.md
Created August 8, 2017 09:44 — forked from reygreen1/移动技术.md
@hello2dj
hello2dj / random.md
Created August 8, 2017 00:32 — forked from joepie91/random.md
Secure random values (in Node.js)

Not all random values are created equal - for security-related code, you need a specific kind of random value.

A summary of this article, if you don't want to read the entire thing:

  • Don't use Math.random(). There are extremely few cases where Math.random() is the right answer. Don't use it, unless you've read this entire article, and determined that it's necessary for your case.
  • Don't use crypto.getRandomBytes directly. While it's a CSPRNG, it's easy to bias the result when 'transforming' it, such that the output becomes more predictable.
  • If you want to generate random tokens or API keys: Use uuid, specifically the uuid.v4() method. Avoid node-uuid - it's not the same package, and doesn't produce reliably secure random values.
  • If you want to generate random numbers in a range: Use random-number-csprng.

You should seriously consider reading the entire article, though - it's

@hello2dj
hello2dj / wave.js
Created June 22, 2017 01:26 — forked from island205/wave.js
window.requestAnimFrame = (function() {
return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function(a) {
window.setTimeout(a, 1000 / 60)
}
})();
window.onload = function() {
var m = canvas.getContext("2d"),
k, g;
canvas.width = k = window.innerWidth * 2.1;
canvas.height = g = window.innerHeight * 1.4;