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@jack-nie
jack-nie / rails http status codes
Created Jan 3, 2019 — forked from mlanett/rails http status codes
HTTP status code symbols for Rails
View rails http status codes
HTTP status code symbols for Rails
Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.
Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing
View sed cheatsheet
FILE SPACING:
# double space a file
sed G
# double space a file which already has blank lines in it. Output file
# should contain no more than one blank line between lines of text.
sed '/^$/d;G'
View color_text.js
function colorText(str,phase)
{
if (phase == undefined) phase = 0;
center = 128;
width = 127;
frequency = Math.PI*2/str.length;
for (var i = 0; i < str.length; ++i)
{
red = Math.sin(frequency*i+2+phase) * width + center;
green = Math.sin(frequency*i+0+phase) * width + center;
View socket-connection-timeout.ruby
# url: https://spin.atomicobject.com/2013/09/30/socket-connection-timeout-ruby/
def connect(host, port, timeout = 5)
# Convert the passed host into structures the non-blocking calls
# can deal with
addr = Socket.getaddrinfo(host, nil)
sockaddr = Socket.pack_sockaddr_in(port, addr[0][3])
Socket.new(Socket.const_get(addr[0][0]), Socket::SOCK_STREAM, 0).tap do |socket|
socket.setsockopt(Socket::IPPPROTO_TCp, Socket::TCP_NODELAY, 1)
@jack-nie
jack-nie / shadowsocks-server.service
Created Apr 25, 2018 — forked from guyskk/shadowsocks-server.service
shadowsocks server systemd service
View shadowsocks-server.service
[Unit]
Description=Shadowsocks Server
After=network.target
[Service]
ExecStart=/usr/local/bin/ssserver -c /etc/shadowsocks/ss-config.json
Restart=on-abort
[Install]
WantedBy=multi-user.target
@jack-nie
jack-nie / time.js
Last active Apr 14, 2018
javascript 获取当前时间
View time.js
function getNowFormatDate() {
var date = new Date();
var dashSeperator = "-";
var colonSeperator = ":";
var month = date.getMonth() + 1;
var strDate = date.getDate();
if (month >= 1 && month <= 9) {
month = "0" + month;
}
if (strDate >= 0 && strDate <= 9) {
@jack-nie
jack-nie / vm-setup.sh
Created Dec 27, 2016 — forked from nf/vm-setup.sh
Script for setting up Debian Jessie VM with my development environment
View vm-setup.sh
#!/bin/bash -e
echo '
PATH=$HOME/go/bin:$PATH
export GOPATH=$HOME
export CDPATH=.:$HOME/src/golang.org/x:$HOME/go/src:$HOME/src/github.com:$HOME/src/github.com/nf:$HOME/src/github.com/adg
export EDITOR=vim
' >> ~/.profile
sudo apt-get update
View gist:69a4a51f441113f2aa9163ac78bdea7c
CREATE UNLOGGED TABLE exclude_test(id integer primary key);
INSERT INTO exclude_test(id) SELECT generate_series(1,50000);
CREATE UNLOGGED TABLE exclude AS SELECT x AS item FROM generate_series(1,40000,4) x;
-- Horrific AND list, takes 80s to plan and execute here:
EXPLAIN ANALYZE SELECT id FROM exclude_test WHERE id <> 1 AND id <> 5 AND id <> 9 AND id <> 13 AND id <> 17 AND id <> 21 AND id <> 25 AND id <> 29 AND id <> 33 AND id <> 37 AND id <> 41 AND id <> 45 AND id <> 49 AND id <> 53 AND id <> 57 AND id <> 61 AND id <> 65 AND id <> 69 AND id <> 73 AND id <> 77 AND id <> 81 AND id <> 85 AND id <> 89 AND id <> 93 AND id <> 97 AND id <> 101 AND id <> 105 AND id <> 109 AND id <> 113 AND id <> 117 AND id <> 121 AND id <> 125 AND id <> 129 AND id <> 133 AND id <> 137 AND id <> 141 AND id <> 145 AND id <> 149 AND id <> 153 AND id <> 157 AND id <> 161 AND id <> 165 AND id <> 169 AND id <> 173 AND id <> 177 AND id <> 181 AND id <> 185 AND id <> 189 AND id <> 193 AND id <> 197 AND id <> 201 AND id <> 205 AND id <>
@jack-nie
jack-nie / bench_rails_memory_usage.rb
Created Aug 29, 2016 — forked from brianhempel/bench_rails_memory_usage.rb
A script to test the memory usage of your Rails application over time. It will run 30 requests against the specified action and report the final RSS. Choose the URL to hit on line 45 and then run with `ruby bench_rails_memory_usage.rb`.
View bench_rails_memory_usage.rb
require "net/http"
def start_server
# Remove the X to enable the parameters for tuning.
# These are the default values as of Ruby 2.2.0.
@child = spawn(<<-EOC.split.join(" "))
XRUBY_GC_HEAP_FREE_SLOTS=4096
XRUBY_GC_HEAP_INIT_SLOTS=10000
XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0
View leak.rb
#!/usr/bin/env ruby
# encoding: utf-8
require 'memory_profiler'
gem 'redis', ENV['RVERSION']
require 'redis'
puts Process.pid
puts Redis::VERSION
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