Sorting

Command line tool to sort files of unlimited size.

Explanations:

• Sorting is ascending.
• Numbers come before lines.
• Strings are sorted lexicographically.
• Invalid input files are skipped with a message.
• Invalid lines (containing spaces) are skipped.
• Asymptotics O(n log n) (merge sort).

Usage:

• the first n - 1 arguments are the names of the input files to be sorted.
• the last n argument presents the directory to save the sorting results.

Example:

sbt "run files.txt to.txt be.txt sorted.txt ~/Downloads"

Output:

• {directory}/sorted.txt – the name of the sorted file. If a file with such a name was passed as arguments to input files, it will be read and overwritten.
• {directory}/sorted-UUID.txt – the name of the temporary file. The file is deleted after sorting is completed. It is needed to store intermediate results outside the memory heap.