如何在电源外壳中替换字符串"var num = ['asd23','asd31']"

Question

替换给定字符串

var num = ['red222','edr223']; //this value is always changing

如下

var num = ['rev11111','rev222']; //replace with any string

试：

num = @('rev11111','rev222') // text present in file say file.txt
(Get-Content "C:file.txt").Replace('var num = *',"var num = ["+(@($Num) -join ",")+"];" )| Set-Content "C:file.txt"

这并没有多大帮助。当[ ]不为空时，它无法替换。如何替换字符串。请帮忙！

Answer 1

我认为您必须使用-replace运算符，而不是字符串对象的Replace方法。由于Replace不支持正则表达式。

如果更改为：

$Num = @('rev11111','rev222') # text present in file say file.txt
(Get-Content "C:tempinput.txt") -replace ('var num = [.*]', "var num = [$(@($Num) -join ",")]") | Set-Content "C:file.txt"

它似乎有效。我还将正则表达式扩展到var num = [.*]。

希望有帮助。