new file:   algorithm/sort/counting.py
	modified:   algorithm/sort/heap.py
	algorithm/statics/
	java/simple-code/
	python/learn-threading/thread_queue.py
	python/performance_test.py
	shell/test
	shell/trunc_begin_end.sh
	new file:   algorithm/statics/rand-select.py
	new file:   java/simple-code/main/class.java
	new file:   python/learn-threading/thread_queue.py
	new file:   python/performance_test.py
	new file:   shell/trunc_begin_end.sh