如何从 powershell 中的文件的每一行打印出第二个单词？

Question

For example: sample.txt contains:

John Doe data
Jane Doe data

An the output would be:

Doe
Doe

I've tried (Get-Content sample.txt).Split(' ')[1] but that doesn't work since it prints the second word of the first line only (second element of the array).

Output:

Doe

Answer 1

You need to call .Split() (and index into the result) on each line read by Get-Content , such as with the intrinsic .ForEach() method :

(Get-Content sample.txt).ForEach({ $_.Split(' ')[1] })

If there's a chance that multiple spaces separate the words on a line, you can use the unary form of PowerShell's -split operator instead:

(Get-Content sample.txt).ForEach({ (-split $_)[1] })

The streaming alternative, using the pipeline and the ForEach-Object cmdlet :

Get-Content sample.txt | ForEach-Object { $_.Split(' ')[1] }

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As for what you tried :

 (Get-Content sample.txt).Split(' ')[1]

• Thanks to member-access enumeration , the .Split() call is applied to each line of the array of lines returned by Get-Content .

• Each .Split() call in turn returns an array.

• Member-access enumeration concatenates these arrays to form a single, flat array containing the words across all lines.

• Your [1] index is then applied only once , namely to this flat array, and returns its second element only (only the first line's second word).