I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!
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tsiege
/ The Technical Interview Cheat Sheet.md
Last active
April 3, 2025 07:18
This is my technical interview cheat sheet. Feel free to fork it or do whatever you want with it. PLEASE let me know if there are any errors or if anything crucial is missing. I will add more links soon.
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| $: (Dollar Colon) is basically a shorthand version of $LOAD_PATH. $: contains an array of paths that your script will search through when using require. | |
| $0 (Dollar Zero) contains the name of the ruby program being run. This is typically the script name. | |
| $* (Dollar Splat) is basically shorthand for ARGV. $* contains the command line arguments that were passed to the script. | |
| $? (Dollar Question Mark) returns the exit status of the last child process to finish. | |
| $$ (Dollar Dollar) returns the process number of the program currently being ran. | |
| $~ (Dollar Tilde) contains the MatchData from the previous successful pattern match. | |
| $1, $2, $3, $4 etc represent the content of the previous successful pattern match. | |
| $& (Dollar Ampersand) contains the matched string from the previous successful pattern match. | |
| $+ (Dollar Plus) contains the last match from the previous successful pattern match. | |
| $` (Dollar Backtick) contains the string before the actual matched string of the previous successful pattern match. |
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