如何正确嵌套Bash反引号 [英] How to properly nest Bash backticks
本文介绍了如何正确嵌套Bash反引号的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
要么我错过了一些反冲,要么反冲似乎不适用于过多的程序员引用循环.
Either I missed some backlash or backlashing does not seem to work with too much programmer-quote-looping.
$ echo "hello1-`echo hello2-\`echo hello3-\`echo hello4\`\``"
hello1-hello2-hello3-echo hello4
想要
hello1-hello2-hello3-hello4-hello5-hello6-...
推荐答案
使用$(commands)
代替:
$ echo "hello1-$(echo hello2-$(echo hello3-$(echo hello4)))"
hello1-hello2-hello3-hello4
$(commands)
与反引号的作用相同,但是您可以嵌套它们.
$(commands)
does the same thing as backticks, but you can nest them.
您可能还对Bash范围扩展感兴趣:
You may also be interested in Bash range expansions:
echo hello{1..10}
hello1 hello2 hello3 hello4 hello5 hello6 hello7 hello8 hello9 hello10
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