blanklin030

#!/bin/sh
#
# This script should be run via curl:
#   sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
# or wget:
#   sh -c "$(wget -qO- https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
#
# As an alternative, you can first download the install script and run it afterwards:
#   wget https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh
#   sh install.sh

blanklin030

#!/bin/bash
set -u

# First check if the OS is Linux.
if [[ "$(uname)" = "Linux" ]]; then
  HOMEBREW_ON_LINUX=1
fi

# On macOS, this script installs to /usr/local only.
# On Linux, it installs to /home/linuxbrew/.linuxbrew if you have sudo access

blanklin030

create table test( id int(10) not null AUTO_INCREMENT,name varchar(3), PRIMARY KEY(id), UNIQUE KEY uqe_name(name) ) engine=innodb charset=utf8;
INSERT INTO test (id, name) VALUES (1, 'aa'), (2, 'bb'), (3, 'cc');

myisam索引

非聚集索引，索引和记录是分开存放的

blanklin030

prototype

标识原型，对象通过原型可挂载到类上（继承）

function Obj(param) {
  this.a = param
}
Obj.prototype.print = function() {
  console.log(this.a)
}

blanklin030

<script type="text/javascript">
const a = {a:1}
console.log(a)
console.log("===================")
const b = Object.create(null,{
	a: {
		writable:true,
		configurable:true,
 value: 2

blanklin030

<script>
var obj = {
	"name": "hello"
}
function test(a,b,c) {
	console.log(this.name)
	console.log(a,b,c)
}
test.call(obj,1,2,3)

blanklin030

install go

download from this url:https://golang.org/dl/

check if install success

go version
ll /usr/local/go

set config

vim ~/.bash_profile

blanklin030

centos7下安装Hadoop2.6

• 假设当前有三台机器，分别是
• 192.168.33.100 hadoop-master
• 192.168.33.200 hadoop-slave01
• 192.168.33.300 hadoop-slave02

配置系统环境

3台机器均要做以下操作

• 配置host

blanklin030

http请求报头

Query String Parameters

// General
Request URL: http://foo.com?x=1&y=2
Request Method: GET

// Query String Parameters
x=1&y=2

blanklin030

#nginx的gzip模块需要zlib库，rewrite模块需要pcre库，ssl模块需要openssl库，查看程序是否已安装：
rpm -q pcre
rpm -q openssl
rpm -q zlib
rpm -q nginx

#!/usr/bin/env bash
#创建用户和组
echo "======创建用户和组======"
/usr/sbin/groupadd -f www