cheat sheets.

Cheat Sheet Title: [ no_spaces_alphanumeric_only ]

Cheat Sheet:
Overview ======== grep searches for lines matching a pattern. $ grep [OPTION]... PATTERN [FILE] ... PATTERN can be a normal string or a regular expression. For more on regular expressions see: $ cheat regexp Get full help: $ grep --help Basic Usage =========== $ grep index *.rb admin_controller.rb: def index store_controller.rb: def index store_controller.rb: redirect_to_index 'Invalid product' store_controller.rb: redirect_to_index "Your cart is currently empty." Useful Options ============== -h: suppress file names in output -w: restrict search to whole words only -c: displays count of matching lines in each file, not the lines themselves (note this is not the same as $ grep index *.rb | wc -l) -i: ignore case -l: list only file names containing matching lines -n: precede each line with the line number where it was found -v: display all lines NOT matching pattern

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