Expressive C++ 17 Coding Challenge, in Pony

This is my first foray into Pony. Be gentle.

Details on the challenge

This command line tool should accept the following arguments:

• the filename of a CSV file,
• the name of the column to overwrite in that file,
• the string that will be used as a replacement for that column,
• the filename where the output will be written.

Here is how to deal with edge cases:

if the input file is empty

• the program should write “input file missing” to the console.
• no output file generated

if the input file does not contain the specified column

• the program should write “column name doesn’t exists in the input file” to the console.
• no output file generated

if the program succeeds but there is already a file having the name specified for output

• the program should overwrite this file.

Setup

1. Install Pony
2. make test

Running

> ./cpp17csv test-input City London output.csv