list comprehension 后面可以有多个for loops,每个for后面可以有if [(x, y, x * y)for x in(0,1,2,3)for y in(0,1,2,3)if x < y]等同于: for x in (0,1,2,3): for y in (0,1,2,3): if x < y: print (x, y, x*y) It also supports both “if" statements and referencing the outer i…
#!pyton2 #-*- coding:utf-8 -*- for letter in "Python": print "Current letter is:",letter fruits=["apple","mango","pear"] for fruit in fruits: print fruit for index in range(len(fruits)): print fruits[index…
// // main.c // Pointer_search // // Created by ma c on 15/8/2. // 要求:通过指针查找,实现比较两个有序数组中的元素,输出两个数组中的第一个相同的元素值. #include <stdio.h> int *searchSameElement(int *a,int *b,int len1,int len2); int main(int argc, const char * argv[]) { int a[] = {5,11,…
from :http://masnun.com/2015/11/20/python-asyncio-future-task-and-the-event-loop.html Event Loop On any platform, when we want to do something asynchronously, it usually involves an event loop. An event loop is a loop that can register tasks to be ex…
Don't Block the Event Loop (or the Worker Pool) | Node.js https://nodejs.org/en/docs/guides/dont-block-the-event-loop/ Don't Block the Event Loop (or the Worker Pool) Should you read this guide? If you're writing anything more complicated than a brie…
将spam_keyword表word字段的字符全部拆分,只是利用过程语言完成循环的操作而已. create or replace function proc1() returns setof text as $$ declare str text; strlength int; strreturn text; i int; curs1 refcursor; --声明游标 begin open curs1 for select replace(word,' ','') from spam_keyw…
Run loops是线程的基础架构部分.一个run loop就是一个事件处理循环,用来不停的调配工作以及处理输入事件.使用run loop的目的是使你的线程在有工作的时候工作,没有的时候休眠. Run loop的管理并不完全是自动的.你仍必须设计你的线程代码以在适当的时候启动run loop并正确响应输入事件.Cocoa和CoreFundation都提供了run loop对象方便配置和管理线程的run loop.你创建的程序不需要显示的创建run loop:每个线程,包括程序的主线程(main…
