grep

Syntax: %grep(i,s)

search the ith file and return lines that match the pattern in s.

Example:

#FILE 1 "num_test.txt"

#99 {#WRITE 1 %i}

#CLOSE 1

this just creates a test file containing the numbers 1 to 99 (each on a line)

now:

#FILE 1 "num_test.txt"

#SHOW %grep(1,"[35]$")

#CLOSE 1

displays a list of all lines ending in either a 3 or 5; i.e. it outputs:

Opened num_test.txt as file 1

3|5|13|15|23|25|33|35|43|45|53|55|63|65|73|75|83|85|93|95

Closed num_test.txt on file 1