https://github.com/nilsmagnus/functions

Handy collection functions for the go language
https://github.com/nilsmagnus/functions

generics go golang

Last synced: 11 days ago
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Handy collection functions for the go language

• Host: GitHub
• URL: https://github.com/nilsmagnus/functions
• Owner: nilsmagnus
• License: other
• Created: 2021-12-22T10:13:49.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2024-06-28T08:04:26.000Z (7 months ago)
• Last Synced: 2025-01-06T02:10:07.794Z (19 days ago)
• Topics: generics, go, golang
• Language: Go
• Homepage:
• Size: 22.5 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
![tests passing](https://github.com/nilsmagnus/functions/actions/workflows/go.yml/badge.svg)

# functions to go

Handy collection-functions for the `go` language. 

Functions to support common collection-operations: 

* `map`

* `reduce`

* `filter`

* `associate`,`associateby`

* `contains`, `containsAll`

* `first`, `last`

* `forEach`, `forEachIndexed`

* `distinct`

Coming soon: See godoc for complete documentation.

## getting started

    go get github.com/nilsmagnus/functions

```go

package main

import (

	"fmt"

	"github.com/nilsmagnus/functions"

	"log"

)

func main() {

	items := []int{1, 2, 99}

	mappedItems := functions.Map(items, func(a int) string { return fmt.Sprintf("mapped %d", a) })

	log.Printf("Mapped items: %v", mappedItems)

}

```

Run this example on the [playground](https://go.dev/play/p/tpcenABL62q?v=gotip)

Have a look at [functions_test.go](functions_test.go) for usage.

### Map-function

```go

numbers := []int{1,2,3,199}

mapd := Map(numbers, func(a int) string { return fmt.Sprintf("%d", a)}) 

// mapd => []string{"1", "2", "3", "199"}

```

### AssociateBy-function 

```go

numbers := []int{1,2,3,199}

mapd := AssociateBy(numbers, func(t int) string {

    return fmt.Sprintf("%d", t)

}) 

// => map[string]int {"1":1, "2":2, "3":3, "199": 199}

```