How to map 2 arrays of object using PowerShell? - arrays

Question

I would like to map an array object. I need to find the matched object of array. After the object match, I need to stop checking other objects, then continue to the next process.
I tried this, but it always return not match, even if the array object match exists.
$ID = #("8537", "8538", "8539", "8540", "85AC", "85DE", "82EA")
$Signal = #("8537", "8220")
for ($i = 0; $i -lt $Signal.count; $i++)
{
if ($Signal[$i] -like "$ID[$i]")
{
"found ‘$($Signal[$i])’
at index $i"
# Do some process
}
else {
"Not Match"
# Do some process
}
}

Answer 1

If you need to go Match process if exists at least 1 match object, you can try this:
$ID = #("8538", "8539", "8540", "85AC", "85DE", "82EA","8537")
$Signal = #("8537","8220","85DE")
$matched = $false
for ($i = 0; $i -lt $ID.count; $i++) {
if ($matched) {
break
}
for ($j = 0; $j -lt $Signal.count; $j++) {
if ($ID[$i] -like $Signal[$j])
{
$matched = $true
"found $($ID[$i]) at index $i"
break
}
}
}
if ($matched) {
# Do some process
} else {
"Not Match"
# Do some process
}

Answer 2

Something like that you should test :
cls
$ID = #("8538", "8539", "8540", "85AC", "85DE", "82EA","8537")
$Signal = #("8537","8220","85DE")
for ($i = 0; $i -lt $ID.count; $i++) {
for ($j = 0; $j -lt $Signal.count; $j++) {
if ($ID[$i] -like $Signal[$j])
{
"found $($ID[$i]) at index $i"
# Do some process
}
else
{
"Not Match"
# Do some process
}
}
}

Answer 3

As mentioned in my comment above - to make your example work you can use a nested loop like this:
$ID = #("8537", "8538", "8539", "8540", "85AC", "85DE", "82EA")
$Signal = #("8234", "8512", "8220")
$MatchFound = $false
for ($i = 0; $i -lt $Signal.count; $i++) {
for ($x = 0; $x -lt $ID.Count; $x++) {
if ($Signal[$i] -eq $ID[$x]) {
"found '$($Signal[$i])' at index $i"
$MatchFound = $true
}
}
}
if (-not $MatchFound) {
"No match was found"
}
If you have a complex object you want to compare you can take a look at the cmdlet Compare-Object.