Continuous-Groups.ps1

# generate regex match groups from arrays
function ContGroup {
    param([object[]]$Source, [int]$GroupSize)
    0..($Source.Length-$GroupSize) |% { $Source | Select -Skip $_ -First $GroupSize | Join-String }
}

# $ ContGroup -Source (1..9 + 0) -GroupSize 4 | Join-String -Separator '|'
# 1234|2345|3456|4567|5678|6789|7890
# $ ContGroup -Source ('a'..'z') -GroupSize 3 | Join-String -Separator '|'
# abc|bcd|cde|def|efg|fgh|ghi|hij|ijk|jkl|klm|lmn|mno|nop|opq|pqr|qrs|rst|stu|tuv|uvw|vwx|wxy|xyz

# https://stackoverflow.com/q/73943221/1280354