This one might make you scratch your head a bit -- but learning about hash tables is definitely worth your time and effort.

Making fast hash tables in programming, which don't cause collision trouble, is one of computing's holy grails. Facebook thinks it's created a good one.

In Windows PowerShell, you most likely have used arrays and hash tables. The latter is simply a different kind of an array called an associative array. When using arrays, you may have a requirement to ...