Using "starts with" in powershell script instead of contains? - powershell

Question

In my current powershell script I have hash table with values. Am using
this syntax
$x = $f.contains("$k")
but I figured recently that am having problems with this approach I was wondering if powershell has something that says "starts with," or related, that would search thru the hash table with "starts with" instead of contains
Example of the hash table:
"bio.txt" = "server1\datafiles\bio";
etc.......
EDIT Sample from comments
foreach ($key in $filehash.keys) {
$path = $filehash.get_Item($key)
$filecount = 0
foreach ($file in $FileArray) {
if ($file.LastWriteTime -lt($(GetDate).adddays(-1))) {
[string] $k = $key.ToLower()
[string] $f = $file.name.ToLower()
if ($x = $f.contains("$k")) { }
}
}
}

Answer 1

Try using -like to check if a string starts with yourvalue. I rewrote your sample in the comments to use it:
$filehash.GetEnumerator() | foreach {
#$_ is now current object from hashtable(like foreach)
#$_.key is key and $_.value is path
$filecount = 0
foreach ($file in $FileArray) {
if ( ($file.LastWriteTime -lt $((Get-Date).AddDays(-1))) -and ($file.name -like "$($_.Key)*") ) {
#process file
}
}
}