powershell: how to evaluate a string read from a file

Question

file a.txt is:

delete from test_$suffix

$a=get-content a.txt

$suffix=\"tableA\"

how to manipulate the variab

Answer 1

Invoke-Expression is the equivalent.

$strExpression = "5 + 5 -eq 10"
Invoke-Expression $strExpression
True

See http://technet.microsoft.com/en-us/library/ee176880.aspx for more information.