Yi Liu liuyix

liuyix / py-stack-mid-expression.py

Created August 30, 2013 15:42

python stack 实现 + 中缀表达式计算

	import logging

	class Stack:
	def __init__(self):
	self.__space = []
	self.cur = -1
	def pop(self):
	if self.cur == -1:
	logging.warn("pop an empty stack")
	return None

liuyix / py-linked-queue.py

Last active December 22, 2015 00:29

	class QueueItem:
	def __init__(self, data):
	self.data = data
	self.next = None
	def __repr__(self):
	string = "Data: {}".format(str(self.data))
	return string

	class LinkedQueue:
	def __init__(self):

liuyix / bash-read-line-by-line.sh

Created August 28, 2013 02:27

bash script: read line by line

	#Credit: http://stackoverflow.com/a/4642213/668223

	FILE=test

	while read CMD; do
	echo "$CMD"
	done < "$FILE"

liuyix / command.sh

Created August 27, 2013 03:01

android screenshot by adb command

adb shell screencap -p | sed 's/\r$//' > screen.png

liuyix / bulk_start_thread_wrapper.py

Created August 20, 2013 09:12

	def start_thread_wrapper(target_func,name='thread-', thread_number=1,daemon=True, args=()):
	assert target_func != None and hasattr(target_func, '__call__')
	for i in xrange(thread_number):
	t = threading.Thread(target=target_func,name=name+str(i), args=args)
	t.daemon = daemon
	t.start()

liuyix / python-call-external-program.py

Last active December 21, 2015 08:18

python 调用外部程序，拿到返回值

	# http://stackoverflow.com/a/707001/668223
	import os
	from subprocess import Popen, PIPE

	process = Popen(["ls", "-la", "."], stdout=PIPE)
	exit_code = os.waitpid(process.pid, 0)
	output = process.communicate()[0]

	# 更好的做法应该是
	# http://docs.python.org/2/library/subprocess.html

liuyix / gist:6217694

Created August 13, 2013 03:37

PF_UNIX, AF_UNIX, PF_LOCAL, AF_LOCAL

	http://blog.csdn.net/qiaoliang328/article/details/4722377
	http://alas.matf.bg.ac.rs/manuals/lspe/snode=38.html

liuyix / yank_select.md

Created August 13, 2013 03:21

emacs Cut, Copy, and Paste

copy/cut多个文本，可以通过 C-y 粘贴，之后通过多次 M-y 逐个选择

liuyix / c_native_log.h

Last active December 20, 2015 17:59

	#define LOGE(fmt,args...) fprintf(stderr, fmt, ##args)
	#define LOGD(fmt,args...) fprintf(stderr, fmt, ##args)
	#define LOGW(fmt,args...) fprintf(stderr, fmt, ##args)

	#include <errno.h>
	#include <string.h>
	#define PLOGE(fmt,args...) LOGE(fmt " failed with %d: %s", ##args, errno, strerror(errno))
	#define PLOGEV(fmt,err,args...) LOGE(fmt " failed with %d: %s", ##args, err, strerror(err))

liuyix / python-distribution.md

Created August 5, 2013 05:41

Python program distribution

deploy时需要解决的问题就是moduler的依赖问题。比如使用BeautifulSoup开发