The Bourne shell’s while loop uses exit codes, like the if conditional. For example, this script does 10 iterations: Bourne shell 的 while 循环使用退出代码,就像 if 条件一样。例如,此脚本进行了 10 次迭代: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #!/bin/sh FILE=/tmp/whiletest....
As a beginner in shell scripting, my knowledge about it is limited since I have recently started learning it. My attempts to locate a sample of a while loop based on time have been fruitless. I need to execute a loop for a predetermined duration, such as one hour, and have it terminate...
1、死循环学会用法 a = 1 while True: print(a) a +=1 2、无限次输入，直到输对，...
|&是一个Bash扩展,已被弃用。它在sh模式下不受支持。无论如何,不要使用|&,忘记它的存在。使用2>&1 |。见https://wiki.bash-hackers.org/scripting/obsolete aws自动缩放组ec2实例以每分钟运行一次脚本 您需要在S3或Cloudwatch上存储脚本日志吗?然后使用EventBridge规则和SSM运行命令文档。 你不在乎这些日志吗?然...
items = reader.Read(1); }// While loop for reading one line at a time. }// Foreach loop for reader collection. }// Foreach loop for processing referenced paths. }// Foreach loop for walking of path list. // Store the list of non-matches in the // session state variable ...
《Linux Command Line and Shell Scripting Bible》Part 13 更多的结构化命令(for while until) for命令 基本语法格式 for var in list do commands done 也可以写成 for var in list; do commands done 读取列表中的值 1 2 3 4 5 6 7 8 9
A handy way to iterate through all of the parameters passed involves the use of a while loop and the shift command. This command is what lets you iterate through all the arguments in the argument list (rather than remaining in an infinite loop)....
$tests= @{'Simple for-loop'= {param([int]$RepeatCount, [random]$RanGen)for($i=0;$i-lt$RepeatCount;$i++) {$null=$RanGen.Next() } }'Wrapped in a function'= {param([int]$RepeatCount, [random]$RanGen)functionGet-RandomNumberCore{param($rng)$rng.Next() }for($i=0;$i-lt$...
This is a very useful way to filter the results, which would be cumbersome and time-consuming in a for or while loop in a shell script. The uniq command is also rather unique in that if passed a second filename on the command line, it will write the output to that file instead of ...
Uma forma simples de iterar através de todos os parâmetros usados envolve o uso de um loop while e o comando shift. Esse comando é o que permite iterar através de todos os argumentos na matriz de argumentos, em vez de ficar em um loop infinito....