iterutil

Documentation

Overview

Package iterutil provides utilities for iterators.

Index

• func Seq2ToSeq[In1, In2, Out any](in iter.Seq2[In1, In2], convert func(In1, In2) Out) iter.Seq[Out]
• func Seq2ToSeqKey[K, V any](seq iter.Seq2[K, V]) iter.Seq[K]
• func Seq2ToSeqValue[K, V any](seq iter.Seq2[K, V]) iter.Seq[V]
• func SeqToSeq2[In, Out1, Out2 any](in iter.Seq[In], convert func(In) (Out1, Out2)) iter.Seq2[Out1, Out2]
• func SeqToSeq2Index[V any](in iter.Seq[V]) iter.Seq2[int, V]
• type KeyVal
  • func NewKeyVal[K, V any](key K, val V) KeyVal[K, V]
  • func (kv KeyVal[K, V]) Values() (key K, val V)

Examples

• Seq2ToSeq
• SeqToSeq2

Functions

func Seq2ToSeq

func Seq2ToSeq[In1, In2, Out any](in iter.Seq2[In1, In2], convert func(In1, In2) Out) iter.Seq[Out]

Seq2ToSeq converts a iter.Seq2 to a iter.Seq.

Example

ss := []string{"zero", "one", "two"}
it := Seq2ToSeq(slices.All(ss), NewKeyVal)
for kv := range it {
	fmt.Println(kv.Key, kv.Val)
}

Output:
0 zero
1 one
2 two

func Seq2ToSeqKey

func Seq2ToSeqKey[K, V any](seq iter.Seq2[K, V]) iter.Seq[K]

Seq2ToSeqKey converts a iter.Seq2 to a iter.Seq that yields only the keys.

func Seq2ToSeqValue

func Seq2ToSeqValue[K, V any](seq iter.Seq2[K, V]) iter.Seq[V]

Seq2ToSeqValue converts a iter.Seq2 to a iter.Seq that yields only the values.

func SeqToSeq2

func SeqToSeq2[In, Out1, Out2 any](in iter.Seq[In], convert func(In) (Out1, Out2)) iter.Seq2[Out1, Out2]

SeqToSeq2 converts a iter.Seq to a iter.Seq2.

Example

kvs := []KeyVal[int, string]{
	NewKeyVal(0, "zero"),
	NewKeyVal(1, "one"),
	NewKeyVal(2, "two"),
}
it := SeqToSeq2(slices.Values(kvs), KeyVal[int, string].Values)
for k, v := range it {
	fmt.Println(k, v)
}

Output:
0 zero
1 one
2 two

func SeqToSeq2Index

func SeqToSeq2Index[V any](in iter.Seq[V]) iter.Seq2[int, V]

SeqToSeq2Index converts a iter.Seq to a iter.Seq2 that yields the index and value. The index is the position of the value in the sequence, starting from 0.

Types

type KeyVal

type KeyVal[K, V any] struct {
	Key K
	Val V
}

KeyVal represents a key-value pair.

func NewKeyVal

func NewKeyVal[K, V any](key K, val V) KeyVal[K, V]

NewKeyVal creates a new KeyVal.

func (KeyVal[K, V]) Values

func (kv KeyVal[K, V]) Values() (key K, val V)

Values returns the key and value of the KeyVal.