zhijia,.zhang jiahut

Please make fork of this, as this can be removed by Github.com sooner or later.

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generate uuid

cat /proc/sys/kernel/random/uuid

https://coderwall.com/p/t_sz3q/generate-uuid-at-shell-prompt

uuidgen

alias uuid="python -c 'import sys,uuid; sys.stdout.write(uuid.uuid4().hex)' | pbcopy && pbpaste && echo"

usage

https://stackoverflow.com/questions/17895306/passing-binding-or-arguments-to-erb-from-the-command-line

erb context=torrentkitty.html hello.html.erb

demo the begin-end block

https://stackoverflow.com/questions/14050296/what-does-rubys-begin-do

cat ruby-begin-end-block.md | grep -v -E '`|^#' | bash -xe

curl -s https://gist.githubusercontent.com/jiahut/25d90714eb9f9181af36559ec4148f51/raw/ | grep -v -E '`|^#' | bash -xe

cat <<-EOF | ruby 
 END { puts 'END block' }

file with blank

https://askubuntu.com/questions/343727/filenames-with-spaces-breaking-for-loop-find-command

touch '1 2.sss' && echo '1 2.sss' > '1 2.sss'
touch '2 1.sss'
touch 1 && echo 1 > 1
touch 2 && echo 2 > 2

find . -name '*.sss' | while read file; do file "$file" ; done

regex

https://rubular.com/ https://stackoverflow.com/questions/6673847/what-are-rubys-numbered-global-variables https://www.jianshu.com/p/974dee8953e6

$` and $' : before $& after match

cat <<- EOF | ruby -ne ' puts $& if $_ =~ /
.*?</div>/ ' a1
test1
b1
test2
c1

statistics

https://unix.stackexchange.com/questions/18506/recursive-statistics-on-file-types-in-directory

find . -type f | sed 's/.*\.//' | sort | uniq -c

find . -type f| ruby -ne 'puts $1 if $_ =~ /.*\.(\S+)/ ' | sort | uniq -c

	package main

	import (
	"bufio"
	"fmt"
	"log"
	"net"
	"time"
	)

	#!/bin/bash

	set -o errexit # set -e
	set -o pipefail

	# https://superuser.com/questions/100288/how-can-i-check-the-integrity-of-a-video-file-avi-mpeg-mp4

	OPTIONS=dio:v
	LONGOPTS=debug,info,output:,verbose

	#!/usr/bin/env ruby

	abort("please spectify a word") unless word = ARGV[0]
	puts `curl -s 'http://dict-co.iciba.com/api/dictionary.php?key=79085A8D69548E2DC4CBEC053A8124FC&type=json&w=#{word}' \| jq -r '.symbols[]?.parts[]?.means[]?'`