在PowerShell中過濾帶.txt文件中的行

我試圖在PowerShell中過濾我的文件，因此它只包含具有值的行。有沒有辦法確定[CAR]標籤背後是否有值？或者我會不得不寫這樣的東西？在PowerShell中過濾帶.txt文件中的行

$file = Get-Content C:\file.txt 
foreach ($line in $file){ 
    if ($line.Length -gt 47){ 
     #somehow safe those lines in another file 
    } 
}

例原始文件：這應該是在新文件中的內容的

25 13:58:09.680 (0410041011) >>> DIAG[CAR] 
25 13:58:09.788 (0410041120) <<< [NAK]#99[CAR]0998034398[CAR]0998028069[CAR] 
25 13:58:29.789 (0410061120) >>> DIAG[CAR] 
25 13:58:29.896 (0410061227) <<< [NAK]#99[CAR]0998023613[CAR] 
25 13:58:49.897 (0410081228) >>> DIAG[CAR] 
25 13:58:49.981 (0410081311) <<< [NAK]#99[CAR]0998007552[CAR]0998019114[CAR]0998007115[CAR] 
25 13:59:09.982 (0410101312) >>> DIAG[CAR] 
25 13:59:10.069 (0410101399) <<< [NAK]#99[CAR]0998024143[CAR] 
25 13:59:29.070 (0410120400) >>> DIAG[CAR] 
25 13:59:29.177 (0410120507) <<< [NAK]#99[CAR]

例子：

25 13:58:09.788 (0410041120) <<< [NAK]#99[CAR]0998034398[CAR]0998028069[CAR] 
25 13:58:29.896 (0410061227) <<< [NAK]#99[CAR]0998023613[CAR] 
25 13:58:49.981 (0410081311) <<< [NAK]#99[CAR]0998007552[CAR]0998019114[CAR]0998007115[CAR] 
25 13:59:10.069 (0410101399) <<< [NAK]#99[CAR]0998024143[CAR]

來源

2016-11-29 Byakko_Haku

$data = @(
    "25 13:58:09.680 (0410041011) >>> DIAG[CAR]", 
    "25 13:58:09.788 (0410041120) <<< [NAK]#99[CAR]0998034398[CAR]0998028069[CAR]", 
    "25 13:58:29.789 (0410061120) >>> DIAG[CAR]", 
    "25 13:58:29.896 (0410061227) <<< [NAK]#99[CAR]0998023613[CAR]", 
    "25 13:58:49.897 (0410081228) >>> DIAG[CAR]", 
    "25 13:58:49.981 (0410081311) <<< [NAK]#99[CAR]0998007552[CAR]0998019114[CAR]0998007115[CAR]", 
    "25 13:59:09.982 (0410101312) >>> DIAG[CAR]", 
    "25 13:59:10.069 (0410101399) <<< [NAK]#99[CAR]0998024143[CAR]", 
    "25 13:59:29.070 (0410120400) >>> DIAG[CAR]", 
    "25 13:59:29.177 (0410120507) <<< [NAK]#99[CAR]" 
) 

# Use lookahead for a digit 
$data -match "\[CAR\](?=\d)"

來源

2016-11-29 07:40:30

本身的lookahed據我所知沒有任何用處？您可以輕鬆地將其刪除並用'「\ [CAR \] \ d]替換它」' –

您是對的。在工程上。 –

在PowerShell中過濾帶.txt文件中的行

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