chunks

Package chunks allows to split a slice of any type into chunks with approximately equals sum of values.

Install

go get github.com/go-deeper/chunks

Usage

Split slice into chunks

package main

import (
	"fmt"

	"github.com/go-deeper/chunks"
)

func main() {
	slice := []int64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
	sliceChunks := chunks.Split(slice, 9)
	fmt.Println(sliceChunks)
}

Output:

[[1 2 3 4 5] [6 7 8 9 10]]

Iterate over chunks using a callback function

package main

import (
	"fmt"

	"github.com/go-deeper/chunks"
)

func main() {
	slice := []int64{1, 2, 3, 4, 5, 6}
	err := chunks.SplitFunc(slice, 5, func(chunk []int64) error {
		fmt.Println(chunk)
		return nil
	})
	fmt.Println(err)
}

Output:

[1 2 3]
[4 5 6]
<nil>

A callback function returns error

package main

import (
	"errors"
	"fmt"

	"github.com/go-deeper/chunks"
)

func main() {
	slice := make([]int64, 10)
	err := chunks.SplitFunc(slice, 1, func(_ []int64) error {
		return errors.New("some error")
	})
	fmt.Println(err)
}

Output:

some error

A callback function stops the iterations without error

package main

import (
	"fmt"

	"github.com/go-deeper/chunks"
)

func main() {
	slice := make([]string, 10)
	err := chunks.SplitFunc(slice, 1, func(_ []string) error {
		return chunks.ErrBreak
	})
	fmt.Println(err)
}

Output:

<nil>