Ways to arrange the integers 1 to 9 with operators so that the result is 100 Prelude:
This task is taken from Five Problems Every Software Engineer Should Be Able to Solve in Less Than an Hour, which I really recommend.
The task:

Write a program that outputs all possibilities to put + or - or
nothing between the numbers 1, 2, ..., 9 (in this order) such that the result is always 100.

Winning Criteria:
Shortest code in bytes wins.
Perl 5.10.0 - 50 46 45B

say for grep{eval==100}glob join'{,+,-}',1..9


Usage: perl -M5.10.0 scratch.pl (I think I get the version for free)