Reimplement the following programs:

• cat
• grep
• cut
• ls
• head
• tail

in the following languages:

• Python
• C
• C++
• Go
• OCaml
• Haskell
• Rust
• Elixer
• Ruby
• Node.js
• Erlang
• Swift
• Lisp

and solve the following challenges:

• How many files are on my computer?
• What are the top 10 posts on reddit?

• Do not use any third party libraries
• Package an installer for each program in the language's native package manager (e.g. npm, pypi, etc) // SHOUT OUT @schep_

• Must support python2 and python3

• At minimum: Read a file to stdout
• At minimum: Read multiple files to stdout
• At minimum: Output errors to stderr

• At minimum: Read the first 10 lines of a file
• Extra credit: Read the first 10 lines of stdin
• Extra credit: Implement an option to define how many lines to read
• Extra credit: Implement an option to read bytes instead of lines
• Extra credit: Don't read the entire file

• At minimum: Read the last 10 lines of a file
• Extra credit: Read the last 10 lines of stdin
• Extra credit: Implement an option to define how many lines to read
• Extra credit: Implement an option to read bytes instead of lines
• Extra credit: Don't read the entire file

• At minimum: Handle multiple paths or files
• Extra credit: Include an option to show hidden files
• Extra credit: Include an option to show exact file size
• Extra credit: Include an option to show file size in human
• Extra credit: Implement separate terminal colors for files and directories

• At minimum: Read lines from a file and return lines that include a keyword
• Extra credit: Implement case-insensitivity flag
• Extra credit: Implement -v (ignore) flag
• Extra credit: Optionally apply keyword to stdin as well as a file