leoyuholo / fdt-ai

FDT AI coding test

Usage

Prerequisite: Need to have Node.js installed on system.

Run npm install or yarn to install dependencies first.

Run index.js directly or by node index.js. -h to show the following usage manuel.

  Usage: ./index.js [options]

  Options:

    -h, --help           output usage information
    -i, --input <path>   Input file
    -o, --output <path>  Output file

If input file option is not provided, it will read from stdin instead.

If output file option is not provided, it will write to stdout instead.

Example usage

In the project directory,

./index.js < ./testcases/basic/in > ./testcases0.out

is equivalent to

./index.js -i ./testcases/basic/in -o ./testcases0.out

Example input

This program expects TSV as input:

OrderId	Trader	StkCode	Quantity	Price	TradeType	Fee	Timestamp
1	AAA	222222	100	10	Buy	0.2	2016-05-09 13:38:24
2	BBB	333333	1000	8.8	Sell	10.56	2016-05-09 10:37:16
3	AAA	222222	100	11	Sell	1.32	2016-05-10 13:38:24
4	BBB	333333	800	9.0	Buy	1.6	2016-05-11 14:58:30
5	BBB	333333	400	9.2	Buy	0.8	2016-05-16 10:28:24
6	AAA	555555	600	15.5	Buy	2.0	2016-05-16 10:31:33

Example output

And output TSV as well, but without header column:

AAA	96.48
BBB	-252.96

Assumptions

1. Quantity must be positive integers.
2. When two traders have same profit(loss), tie break with alphabetical order of trader id.
3. Input are sorted in ascending order of OrderId.
4. OrderId is unique and determines the order sequence. An order with smaller OrderId than another order means the former arrives earlier than the latter, and should be processed first.

Development

You can utilize the scripts in package.json to further develop this project.

• To run test, run npm run test.
• To lint code, run npm run lint.
• To run coverage, run npm run coverage and check the generated coverage/lcov-report directory.
• To watch file changes and restart automatically, run npm run dev
• To watch file changes and run test automatically, run npm run test-watch

To avoid inconsistent development environment, you are recommended to do development with docker and docker-compose on Ubuntu.

To start development, simplily run docker-compose up to spin up the development environment. You may edit docker-compose.yaml to run different scripts.