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...
There might be other ways to get this done, but remember, this is just an example of things youcando with aforloop. What if you have a mountain of files named something likeFILE002.txt, and you want to replaceFILEwith something likeTEXT. Remember that in addition to Bash itself, you ...
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 lo loopback interface is often the only place you’ll see static network configuration in boot-time scripts. For example, Ubuntu’s ifup command reads /etc/network/interfaces and Fedora uses /etc/sysconfig/network interfaces/ ifcfg-lo. You can often find the loopback device configuration by...
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...
$test变量保持了其值,也允许我们修改它的值,并在for命令循环之外跟其他变量一样使用。 1.2、读取列表中的复杂值 事情并不会总像你在for循环中看到的那么简单。有时会遇到难处理的数据。下面是给shell脚本程序员带来麻烦的典型例子。 1$catbadtest12#!/bin/bash3# another example of how not to use theforco...
for test in Nevada New Hampshire New Mexico New York North Carolina do echo "Now going to $test" done 示例 for命令用空格来划分列表中的每个值。如果在单独的数据值中有空格,就必须用双引号将这些值圈起来。 #!/bin/bash # an example of how to properly define values ...
(); for (loop = 0; loop < 1000; loop++) { memcpy(daddr, saddr, 4096); } delta = ktime_get_ns() - start_time; printk("run memcpy %d times, total time : %lu ns, average time : %lu ns\n", loop, delta, delta / loop); if (daddr) { kunmap_atomic(daddr); } if (d...
When you want to iterate over the sequence one way is to iterate using the for loop given below that gives the position of the desired element. The example below iterates over the list of fruits and returns the position of fruit "Mango". ...
-eq 0 ] && return 0 || return 1 } checkrs() { local I=1 while [ $I -le $CHKLOOP ]; do if curl --connect-timeout 1 http://$1 &> /dev/null; then return 0 fi let I++ done return 1 } initstatus() { local I local COUNT=0; for I in ${RS[*]}; do if ipvsadm ...