转自: http://blog.csdn.net/zzjjiandan/article/details/23828953
yield和sleep的区别
JDK1.5.0的API文档里的描述: yield:Causes the currently executing thread object to temporarily pause and allow other threads to execute. sleep:Causes the currentl…
1.yield是放在函数里面的,且带有yield的函数就叫做生成器,这时函数就成了一个对象,而不能把它作为函数来对待
def foo(num):print("introduction:")while:if num < 10:num 1yield num
g foo()看上面的代码,我们把…
摘选 stackoverflow 一段: http://stackoverflow.com/questions/11048946/stdthis-threadyield-vs-stdthis-threadsleep-for
std::this_thread::yield tells the implementation to reschedule the execution of threads, that should be used in a case where you are in a…
1 yield表达式(generator)
其实感觉就是为了让它能用for i in (这个东西)中,构造了一个生成器,需要一个就生成给你,例如:
这里每次生成列表中的一个数字,可以直接用for
l [2,3,4]
def foo(list2gen):fo…
总结:通常的for...in...循环中,in后面是一个数组,这个数组就是一个可迭代对象,类似的还有链表,字符串,文件。它可以是mylist [1, 2, 3],也可以是mylist [x*x for x in range(3)]。它的缺陷是所…
sleep原理
sleep是Thread类中的静态方法,首先看下sleep的源码
/*** Causes the currently executing thread to sleep (temporarily cease* execution) for the specified number of milliseconds, subject to* the precision and accuracy of system timers and …