tianchaijz

function print_lua_table (lua_table, indent)
	indent = indent or 0
	for k, v in pairs(lua_table) do
		if type(k) == "string" then
			k = string.format("%q", k)
		end
		local szSuffix = ""
		if type(v) == "table" then
			szSuffix = "{"
		end

tianchaijz

key bindings	explanation
M-x shell-command-on-region(M-|)	send current region to shell
C-u M-! <shell-command>	insert command result into buffer
C-u M-| <shell-command>	current region is sent to the shell-command and replaced with the result
M-^	join line
M-g g	jump to the specified line
M-x apply-macro-to-region-lines	apply macro to region lines
C-u C-space(or C-u C-@)	go back to previous line position

tianchaijz

* ls *Page.h | while read one; do mv "$one" "$(echo "$one" | perl -ne 'print join("_", split(/(?=[A-Z])/))')"; done;
* for i in `ls *.t`; do perl -pi.bak -e 'print "\$ENV{TEST_NGINX_CHECK_LEAK} = 1;\n" if /HUP/' $i; done
* sudo watch -n 5 pkill -USR1 (-n -x) unxz
* TERM=xterm-256color emacs -nw
* for i in `seq 1 254` ; do arping -I enp9s0 -c 1 172.16.2.$i | grep reply ; done
* sudo tcpdump -i enp3s0 -nt -s 500 port domain  
* du -sh .[^.]*
* To find all files modified in the last 24 hours (last full day) in a particular specific directory and its sub-directories:
* -> find /directory_path -mtime -1 -ls
* find . -mtime 0

tianchaijz

• 管道是传递信息的手段而已，高级的功能都是通过在机制上设计协议完成的。要设计复杂的协议多看看状态机、编译原理一类的资料。计算机的奥妙就在于用最简洁的方式纪录最复杂的信息。在一个管道上控制双方的行为尤其需要这种技巧。

tianchaijz

#!/bin/bash
# Copyright 2010 Eric Ryan Harrison <[email protected]>
# Inspired by:
#       http://daniel.haxx.se/blog/2010/12/14/add-latency-to-localhost/

if [ -n "$1" ]
then
        if [ "$1" = "off" ]
        then
                tc qdisc del dev lo root

tianchaijz

use Capture::Tiny 'tee';
my $output = tee { system( "some command" ) };

# http://stackoverflow.com/questions/634508/how-can-i-send-perl-output-to-a-both-stdout-and-a-variable
----

use IPC::System::Simple qw(capture);

# Capture output into $result and throw exception on failure
my $result = capture("some_command"); 

tianchaijz

import java.util.Collection;
import java.util.SortedMap;
import java.util.TreeMap;
// From: http://www.tom-e-white.com/2007/11/consistent-hashing.html
public class ConsistentHash<T> {
 
    private final HashFunction hashFunction;
    private final int numberOfReplicas;
    private final SortedMap<Integer, T> circle =
        new TreeMap<Integer, T>();

tianchaijz

This started out as a fork of the progress bar class which I first hosted on ActiveState Code.

It builds a text progress bar and displays it with the draw() method.

The methods are showcased below:

from progressBar import progressBar

# Initiates the progessBar
prog = progressBar(maxValue = 50)

tianchaijz

#!/usr/bin/perl

## 使い方： $ perl simple-fork-httpd.pl [ポート番号（デフォルト8080）]

use strict;
use warnings;

use encoding 'utf8';
use Encode;
use Socket;

tianchaijz

#!/usr/bin/luajit

local M = {}
local ffi = require "ffi"

ffi.cdef[[
/*
LZ4_compress() :
	isize  : is the input size. Max supported value is ~1.9GB
	return : the number of bytes written in buffer dest