Check first character of each line for a specific value in PowerShell

Question

I am reading in a text file that contains a specific format of numbers. I want to figure out if the first character of the line is a 6 or a 4 and store the entire line in an

Answer 1

If you're running V4:

$fourArray,$sixArray = 
((get-content $file) -match '^4|6').where({$_.startswith('4')},'Split')