我不確定我是否錯誤地從函式回傳值，但是當我嘗試訪問它的資訊時，它有上述錯誤，
無法索引到空陣列
我嘗試了幾種不同的方法，我不確定我是否沒有從函式中正確回傳它，或者我是否只是訪問了錯誤回傳的資訊。看著無法索引到空陣列，對他來說，他的一些陣列看起來像空值。但是當我在退出函式之前將資訊列印到螢屏時，它有資訊。如何回傳在函式中找到的值，以便我可以遍歷主代碼中的內容并使用物件中的字串之一？這是決議重復模式的延續。
#parse data out of cpp code and loop through to further process
#function
Function Get-CaseContents{
[cmdletbinding()]
Param ( [string]$parsedCaseMethod, [string]$parseLinesGroupIndicator)
Process
{
# construct regex
$fullregex = [regex]"_stprintf[\s\S]*?_T\D*", # Start of error message, capture until digits
"(?<sdkErr>\d )", # Error number, digits only
"\D[\s\S]*?", # match anything, non-greedy
"(?<sdkDesc>\((. ?)\))", # Error description, anything within parentheses, non-greedy
"([\s\S]*?outError\s*=(?<sdkOutErr>\s[a-zA-Z_]*))", # Capture OutErr string and parse out part after underscore later
"[\s\S]*?", # match anything, non-greedy
"(?<sdkSeverity>outSeverity\s*=\s[a-zA-Z_]*)", # Capture severity string and parse out part after underscore later
'' -join ''
# run the regex
$Values = $parsedCaseMethod | Select-String -Pattern $fullregex -AllMatches
# Convert Name-Value pairs to object properties
$result = foreach ($match in $Values.Matches){
[PSCustomObject][ordered]@{
sdkErr = $match.Groups['sdkErr']
sdkDesc = $match.Groups['sdkDesc']
sdkOutErr = $match.Groups['sdkOutErr']
sdkSeverity = ($match.Groups['sdkSeverity'] -split '_')[-1] #take part after _
}
}
#Write-Host "result:" $result -ForegroundColor Green
$result
return $Values
...
#main code
...
#call method to get case info (sdkErr, sdkDesc, sdkOutErr, sdkSeverity)
$ValuesCase = Get-CaseContents -parsedCaseMethod $matchFound -parseLinesGroupIndicator "_stprintf" #need to get returned info back
$result = foreach ($match in $ValuesCase.Matches){
[PSCustomObject][ordered]@{
sdkErr = $match.Groups['sdkErr']
sdkDesc = $match.Groups['sdkDesc']
sdkOutErr = $match.Groups['sdkOutErr']
sdkSeverity = ($match.Groups['sdkSeverity'] -split '_')[-1] #take part after _
} #result
} #foreach ValuesCase
發送給函式決議的字串的例子是：
...
case kRESULT_STATUS_Undefined_Opcode:
_stprintf( outDevStr, _T("8004 - (Comm. Err 04) - %s(Undefined Opcode)"), errorStr);
outError = INVALID_PARAM;
outSeverity = CCA_WARNING;
break;
case kRESULT_STATUS_Comm_Timeout:
_stprintf( outDevStr, _T("8005 - (Comm. Err 05) - %s(Timeout sending command)"), errorStr);
outError = INVALID_PARAM;
outSeverity = CCA_WARNING;
break;
case kRESULT_STATUS_TXD_Failed:
_stprintf( outDevStr, _T("8006 - (Comm. Err 06) - %s(TXD Failed--Send buffer overflow.)"), errorStr);
outError = INVALID_PARAM;
outSeverity = CCA_WARNING;
break;
...
我嘗試的另一件事是（但它也有索引到空陣列問題）：
foreach($matchRegex in $ValuesCase.Matches)
{
$sdkOutErr = $matchRegex.Groups['sdkOutErr']
Write-Host sdkOutErr -ForegroundColor DarkMagenta
}
Ultimately, I need to grab $sdkOutErr to further process. I'll need to use the other variables too in the returned object, but this is the first one I need. I love the way the output is formatted in the function, but probably don't know how to return the info and use what is returned. I'm not sure what to search for to figure out the issue other than the error message, which leads me to believe I'm returning the info wrong. I don't think I need to return $result, because I think that's just a string with the values in the $values.Matches in the function. I need to access the values returned as I mentioned.
I checked, and the contents sent to the function is not blank.
I tried returning $results, and it looks like this when I write-Host, which would be difficult to access each sdkOutErr:
@{sdkErr=1000; sdkDesc=(Out of Memory); sdkOutErr= NO_MEMORY; sdkSeverity=FATAL} @{sdkErr=1002; sdkDesc=(Failed to load DLL); sdkOutErr= OTHER_ERROR; sdkSeverity=FATAL} @{sdkErr=1003; sdkDesc=(Failed to load DLL); sdk
OutErr= OTHER_ERROR; sdkSeverity=FATAL} @{sdkErr=1004; sdkDesc=(Failed to open); sdkOutErr= OTHER_ERROR; sdkSeverity=FATAL} @{sdkErr=1005; sdkDesc=(Unable to access the specified profile); sdkOutErr= OTHER_ERROR; sdkSeverity=
FATAL} @{sdkErr=100 ...
我如何從函式中回傳它以便它不是空陣列/索引，并且如果我在主代碼中使用 foreach 回圈（或兩個）來獲取 sdkOutErr（開始），則資料是可訪問的。
我對（復雜的）powershell 還很陌生，我感覺我的函式中的陣列內部需要一個映射，但我不確定。
在我回傳函式值或結果之前，它正在列印這樣的東西。一旦我添加了 main $ValuesCase=Get-CaseContents...（從函式回傳 $values）或 $parsedCase = Get-CaseContents...（從函式回傳 $results），它就停止在螢屏上顯示：
sdkErr sdkDesc sdkOutErr sdkSeverity
------ ------- --------- -----------
1000 (Out of Memory) NO_MEMORY FATAL
1002 (Failed to load DLL) OTHER_ERROR FATAL
1003 (Failed to load DLL) OTHER_ERROR FATAL
1004 (Failed to open) OTHER_ERROR FATAL
uj5u.com熱心網友回復：
我嘗試回傳$results，我寫Host的時候是這樣的，每個sdkOutErr都很難訪問：
獲取所有sdkOutErr值并不像您想象的那么困難：
$results.sdkOutErr # this will output the `sdkOutErr` value from each object in the array
或者，在函式之外：
(Get-CaseContents -parsedCaseMethod $matchFound -parseLinesGroupIndicator "_stprintf").sdkOutErr
如果結果集很大，另一個可能會表現得更好的選項是ForEach-Object僅用于獲取sdkOutErr值：
$fullResults = Get-CaseContents -parsedCaseMethod $matchFound -parseLinesGroupIndicator "_stprintf"
$sdkOutErrValuesOnly = $fullResults |ForEach-Object -MemberName sdkOutErr
轉載請註明出處，本文鏈接：https://www.uj5u.com/gongcheng/383748.html
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