Retrieve 1st line only from input file

pm091 · web-flow · commit 2427c61d4613 · 2019-05-20T16:53:39.000+01:00
Retrieves the 1st line only to avoid passing the file object across the pipeline.
diff --git a/Validate-CSVHeaders.ps1 b/Validate-CSVHeaders.ps1
@@ -8,7 +8,7 @@ function Validate-CSVHeaders ($correctHeaders) {
     [ValidateSet('Yes','No')]$validateHeaders = Read-Host "Validate headers?"
     if ($validateHeaders -eq 'Yes') {
 	    # put all the headers into a comma separated array
-	    $headers = (Get-Content $fileName | Select-Object -First 1).Split(",")
+	    $headers = (Get-Content $fileName -TotalCount 1).Split(",")
 	    for ($i = 0; $i -lt $headers.Count; $i++) {
 		
 		    # trim any leading white space and compare the headers
@@ -21,4 +21,4 @@ function Validate-CSVHeaders ($correctHeaders) {
     }
 }
 
-Validate-CSVHeaders $correctHeaders
+Validate-CSVHeaders $correctHeaders

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@ function Validate-CSVHeaders ($correctHeaders) {`
`8`	`8`	`[ValidateSet('Yes','No')]$validateHeaders = Read-Host "Validate headers?"`
`9`	`9`	`if ($validateHeaders -eq 'Yes') {`
`10`	`10`	`# put all the headers into a comma separated array`
`11`		`- $headers = (Get-Content $fileName \| Select-Object -First 1).Split(",")`
	`11`	`+ $headers = (Get-Content $fileName -TotalCount 1).Split(",")`
`12`	`12`	`for ($i = 0; $i -lt $headers.Count; $i++) {`
`13`	`13`
`14`	`14`	`# trim any leading white space and compare the headers`
`@@ -21,4 +21,4 @@ function Validate-CSVHeaders ($correctHeaders) {`
`21`	`21`	`}`
`22`	`22`	`}`
`23`	`23`
`24`		`-Validate-CSVHeaders $correctHeaders`
	`24`	`+Validate-CSVHeaders $correctHeaders`