https://github.com/mxssl/topn

Go implementation of topn app that finds top N numbers in a file
https://github.com/mxssl/topn

go golang test-task topn

Last synced: about 2 months ago
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Go implementation of topn app that finds top N numbers in a file

• Host: GitHub
• URL: https://github.com/mxssl/topn
• Owner: mxssl
• Created: 2020-02-28T00:28:01.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-02-28T01:06:34.000Z (almost 5 years ago)
• Last Synced: 2024-11-14T01:33:14.621Z (about 2 months ago)
• Topics: go, golang, test-task, topn
• Language: Go
• Homepage:
• Size: 88.9 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-golang-repositories - topn

README

        
# topn

topn finds top N numbers in a file

## Task

Write a program, topN, that given an arbitrarily large file and a number, N, containing individual numbers on each line (e.g. 200Gb file), will output the largest N numbers, highest first.

## Install

- [Install go](https://golang.org/dl/)

- `make build`

## Usage

### Generate file

`topn generate --lines N --name filename` - generate `file` with `N` lines of random numbers.

### Find the top N of largest numbers

`topn run --file filename --top N`

### Example

- Generate file `numbers.txt` with `1000` lines of random numbers

```sh

./topn generate --name numbers.txt --lines 1000

File numbers.txt with 1000 lines of random numbers was successfully generated!

```

- Find top 5 largest numbers in file `numbers.txt`

```sh

./topn run --file numbers.txt --top 5

[9219151525891662339 9215619702456294450 9207997407084704522 9207450753580197605 9173624551887931713]

```

## Test

```sh

go test -cover -v ./...

?   	github.com/mxssl/topn	[no test files]

=== RUN   TestCase1

expected:  [100 90 80 70 60]

output:  [100 90 80 70 60]

--- PASS: TestCase1 (0.00s)

PASS

coverage: 42.3% of statements

ok  	github.com/mxssl/topn/cmd	0.260s	coverage: 42.3% of statements

```