for (int i = 0; i < 1000; i++) { for (int j = 0; j < 10000; j++) { int x = sin(i) + cos(j); } } } void loop1() { for (int i = 0; i < 10; i++) { for_loop(); } } void loop2() { for (int i = 0; i < 100; i++) { for_loop(); } } int...
linux shell 脚本实现tcp/upd协议通讯(重定向应用) /dev/loop 在类UNIX操作系统中,Loop设备 可以把loop 文件,作为块设备挂载使用。 如: [chengmo@centos5 shell]$mount -o loop example.img /home/chengmo/img #将img镜像文件挂载到/home/chengmo/img目录下面,有了这个设备,我们不需要通过虚拟光驱就可以读虚...
* The use of signed ints for order and current_order is a deliberate * deviation from the rest of this file, to make the for loop * condition simpler. */ static __always_inline bool __rmqueue_fallback(struct zone *zone, int order, int start_migratetype, unsigned int alloc_flags) {...
作者写了一段测试代码: #include <linux/kernel.h> #include <linux/string.h> #include <linux/gfp.h> #include <linux/highmem.h> #include <linux/module.h> static int __init test_memcpy_init(void) { struct page *spage, *dpage; char *saddr, *daddr; int loop; u64 start_time, delta...
The payload, on the other hand, is the actual application data that the computer wants to send (for example, HTML or image data). 计算机通过网络以小块称为数据包的形式传输数据,数据包由两部分组成:头部和有效载荷。 头部包含识别信息,例如源/目标主机和基本协议。 而有效载荷则是计算机要发送的实际...
Commands you enter on the Linux terminal are case-sensitive and follow a syntax like “command -options arguments.” You can combine them for complex tasks using pipelines and redirection.Some key things to know about Linux commands:They are case-sensitive; for example, “ls” and “LS” ...
Command mode: It is the default mode, in this mode you can use any vi command, from command mode we can enter into insert mode by using multiple ways, for example we can use i. To enter into exit mode we press : key. Insert mode: In this mode we can insert/modify/append data, ...
$test变量保持了其值,也允许我们修改它的值,并在for命令循环之外跟其他变量一样使用。 1.2、读取列表中的复杂值 事情并不会总像你在for循环中看到的那么简单。有时会遇到难处理的数据。下面是给shell脚本程序员带来麻烦的典型例子。 1$catbadtest12#!/bin/bash3# another example of how not to use theforco...
of the article. Some sites may be known by a number of valid names. For example, some sites use their fully qualified domain name in this field, or an alias likenews.site.domain. To ensure the loop prevention mechanism works, it is important to add all aliases to the exclusion list, ...
In the above syntax, there are two expressions inside the square bracket. one for the “if statement”and another for the “else statement”. The expression value will be iterated on any object using for loop. Let’s understand “List comprehension with if-else” with an example of the cod...