Practical Task №1

Console utility for parsing json and csv files. Utility can work with input file and in generate data mode.

Features

• Parse input file in csv or json format
• Create random data in the specified amount
• Output to the console the name, surname and age of the oldest user.
• Output to the console the name, surname and counter of the user's most frequently encountered surname.
• Create output file in the specified format (json or csv)
• E2E tests for main logic of utility

Installing

npm install

CLI parameters

Option	Short type	by Defualt	Description
--input	-i	false	Path for input file.
--count	-c	10	The numeric value of the number of records in the output file (not compatible with the --count parameter)
--output	-o	output-file.json	The name of the output file. The file is saved in the /output-files folder.
--help	-h	false	Display info for CLI parameters.

By default without any CLI parameters, utility work in generate node with default value in counter.

Example valid files

1. json - https://scr.abz.agency/xQuz4XqO
2. csv - https://scr.abz.agency/P8u604Qj

Run utility (examples)

Note: Output files saved in folder ./output-files.

After running, the utility automatically remove otput folder.

Input file mode :

npm run app -- --input /path/to/input/file.json --output /path/to/output/file.json

Generate data mode :

npm run app -- --count 20 --output /path/to/output/file.json

Run tests

npm run test