helper pkgs
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c8f2534112
commit
efd8912842
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@ -6,7 +6,7 @@ import (
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"github.com/go-ap/jsonld"
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"github.com/stretchr/testify/require"
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"sectorinf.com/emilis/flabk/asf/ap"
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"sectorinf.com/emilis/flabk/flabk/ap"
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)
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func GetExample() ap.Object {
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@ -0,0 +1,19 @@
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package coll
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type Iterator[T any] Vector[T]
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func (i Iterator[T]) ForEach(f func(int, T)) {
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for index := 0; index < i.length; index++ {
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f(index, i.array[index])
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}
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}
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func (i Iterator[T]) ForBreak(f func(index int, t T, breaker func())) {
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var broke bool
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brk := func() {
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broke = true
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}
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for index := 0; index < i.length || !broke; index++ {
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f(index, i.array[index], brk)
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}
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}
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@ -0,0 +1,72 @@
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// Package coll provides generic collection types and functions
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package coll
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func Map[T, V any](c Vector[T], f func(T) V) Vector[V] {
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out := make([]V, c.length)
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for index := 0; index < c.length; index++ {
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out[index] = f(c.array[index])
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}
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return From(out)
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}
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func Filter[T any](v Vector[T], f func(T) bool) Vector[T] {
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out := WithCap[T](v.length)
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v.Iterate().ForEach(func(_ int, t T) {
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if f(t) {
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out.Push(t)
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}
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})
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return out
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}
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func Take[T any](v Vector[T], howMany int) Vector[T] {
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if v.length == 0 {
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return New[T]()
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}
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if v.length < howMany {
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howMany = v.length
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}
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return From(v.array[:howMany-1])
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}
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func Any[T any](v Vector[T], f func(T) bool) bool {
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var found bool
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v.Iterate().ForBreak(func(_ int, t T, breaker func()) {
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if f(t) {
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found = true
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breaker()
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}
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})
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return found
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}
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type numeric interface {
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~int | ~int8 | ~int16 | ~int32 | ~int64 | ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~float32 | ~float64
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}
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func Min[T numeric](v Vector[T]) T {
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var min T
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if v.length == 0 {
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return min
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}
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min = v.array[0]
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v.Iterate().ForEach(func(_ int, t T) {
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if min > t {
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min = t
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}
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})
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return min
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}
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func Max[T numeric](v Vector[T]) T {
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var max T
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v.Iterate().ForEach(func(_ int, t T) {
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if max < t {
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max = t
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}
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})
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return max
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}
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@ -0,0 +1,165 @@
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package coll
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import "fmt"
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const (
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DefaultSize = 4
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)
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type Vector[T any] struct {
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array []T
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length int
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capacity int
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}
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func New[T any]() Vector[T] {
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return WithCap[T](DefaultSize)
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}
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func WithCap[T any](capacity int) Vector[T] {
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return Vector[T]{
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array: make([]T, capacity),
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length: 0,
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capacity: capacity,
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}
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}
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func From[T any](v []T) Vector[T] {
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return Vector[T]{
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array: v,
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length: len(v),
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capacity: len(v),
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}
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}
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func (v Vector[T]) Push(t T) Vector[T] {
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if v.length == v.capacity {
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v = v.upsize()
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}
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v.array[v.length] = t
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v.length++
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return v
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}
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func (v Vector[T]) Append(t ...T) Vector[T] {
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if v.capacity-v.length < len(t) {
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v = v.upsizeSpecific(len(t))
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}
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var tIndex int
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for ; v.length < v.capacity; v.length++ {
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v.array[v.length] = t[tIndex]
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tIndex++
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}
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return v
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}
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func (v Vector[T]) Remove(index int) Vector[T] {
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return From(append(v.array[:index], v.array[index+1:v.length]...))
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}
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// Faster remove function that can be used on vectors where ordering doesn't matter
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func (v Vector[T]) RemoveUnordered(index int) Vector[T] {
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v.length--
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v.array[index] = v.array[v.length]
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return v
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}
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func (v Vector[T]) upsize() Vector[T] {
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return v.upsizeSpecific(v.capacity)
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}
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func (v Vector[T]) upsizeSpecific(extraSize int) Vector[T] {
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v.array = append(v.array, make([]T, extraSize)...)
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v.capacity = len(v.array)
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return v
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}
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func (v Vector[T]) Slice() []T {
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if v.length == 0 {
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return []T{}
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}
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return v.array[:v.length]
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}
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func (v Vector[T]) panicIndex(index int) {
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min := -1
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if v.length != 0 {
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min = 0
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}
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panic(fmt.Sprintf("index %d out of range [%d;%d)", index, min, v.length))
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}
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// GetSoft tries to get the requested index, or returns a default value if
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// it's out of range
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func (v Vector[T]) GetSoft(index int) T {
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var result T
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if index < 0 || index >= v.length {
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return result
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}
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return v.array[index]
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}
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func (v Vector[T]) Get(index int) T {
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if index < 0 || index >= v.length {
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v.panicIndex(index)
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}
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return v.array[index]
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}
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func (v Vector[T]) Set(index int, value T) Vector[T] {
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if index < 0 || index >= v.length {
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v.panicIndex(index)
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}
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v.array[index] = value
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return v
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}
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func (v Vector[T]) Len() int {
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return v.length
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}
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func (v Vector[T]) Iterate() Iterator[T] {
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return Iterator[T](v)
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}
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func (v Vector[T]) Pop() (T, Vector[T]) {
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v.length--
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t := v.array[v.length]
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return t, v
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}
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func (v Vector[T]) Sub(start, end int) Vector[T] {
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if start >= v.length {
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v.panicIndex(start)
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}
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if end >= v.length {
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v.panicIndex(end)
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}
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if start < 0 {
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return From(v.array[:end])
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}
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if end < 0 {
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return From(v.array[start:])
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}
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return From(v.array[start:end])
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}
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func (v Vector[T]) Filter(f func(T) bool) Vector[T] {
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return Filter(v, f)
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}
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func (v Vector[T]) Any(f func(T) bool) bool {
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return Any(v, f)
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}
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func (v Vector[T]) Take(howMany int) Vector[T] {
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return Take(v, howMany)
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}
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func (v Vector[T]) Clone() Vector[T] {
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clone := make([]T, len(v.array))
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copy(clone, v.array)
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v.array = clone
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return v
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}
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@ -0,0 +1,152 @@
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package coll_test
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import (
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"testing"
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"github.com/stretchr/testify/require"
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"sectorinf.com/emilis/flabk/pkg/coll"
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)
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func TestVector(t *testing.T) {
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tests := map[string]func(that *require.Assertions){
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"push": func(that *require.Assertions) {
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v := coll.New[int]()
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v = v.Push(0).Push(1).Push(2).Push(3).Push(4).Push(5)
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that.Equal(6, v.Len())
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that.Len(v.Slice(), 6)
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that.Equal([]int{0, 1, 2, 3, 4, 5}, v.Slice())
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},
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"len": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3})
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that.Equal(3, v.Len())
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that.Len(v.Slice(), v.Len())
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},
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"from": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3})
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that.Equal(3, v.Len())
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that.Len(v.Slice(), 3)
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},
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"pop": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3})
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t, v := v.Pop()
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that.Equal(3, t)
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that.Equal(2, v.Len())
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that.Equal([]int{1, 2}, v.Slice())
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},
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"withcap": func(that *require.Assertions) {
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v := coll.WithCap[int](3)
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that.Zero(v.Len())
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that.Len(v.Slice(), 0)
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},
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"remove": func(that *require.Assertions) {
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v := coll.New[int]().Push(0).Push(1).Push(2)
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r1 := v.Remove(1)
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that.Equal(2, r1.Len())
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that.Equal([]int{0, 2}, r1.Slice())
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that.Panics(func() {
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v.Remove(-1)
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})
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that.Panics(func() {
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v.Remove(100000)
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})
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},
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"remove unordered": func(that *require.Assertions) {
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v := coll.New[int]().Push(0).Push(1).Push(2)
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v = v.RemoveUnordered(1)
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that.Equal(2, v.Len())
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vSlice := v.Slice()
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if vSlice[0] == 0 {
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that.Equal(2, vSlice[1])
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} else {
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that.Equal(2, vSlice[0])
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that.Zero(vSlice[1])
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}
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},
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"append": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3}).Append(4, 5, 6)
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that.Equal(6, v.Len())
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that.Equal([]int{1, 2, 3, 4, 5, 6}, v.Slice())
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},
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"getsoft": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3})
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that.Equal(2, v.GetSoft(1))
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that.Zero(v.GetSoft(-1000))
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that.Zero(v.GetSoft(1000))
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},
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"get": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3})
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that.Equal(2, v.Get(1))
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that.Panics(func() {
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v.Get(-1000)
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})
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that.Panics(func() {
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v.Get(1000)
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})
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},
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"clone": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3})
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v1 := v.Clone().Set(1, 1)
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that.Equal(3, v1.Len())
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that.Equal([]int{1, 1, 3}, v1.Slice())
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that.Equal([]int{1, 2, 3}, v.Slice())
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},
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"set": func(that *require.Assertions) {
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v := coll.From([]int{1, 2, 3})
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v1 := v.Clone().Set(1, 1)
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that.Equal(3, v1.Len())
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that.Equal([]int{1, 1, 3}, v1.Slice())
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v2 := v.Clone().Set(2, 1)
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that.Equal(3, v2.Len())
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that.Equal([]int{1, 2, 1}, v2.Slice())
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v3 := v.Clone().Set(0, 16)
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that.Equal(3, v3.Len())
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that.Equal([]int{16, 2, 3}, v3.Slice())
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that.Panics(func() {
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v.Set(-1000, 1)
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})
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that.Panics(func() {
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v.Set(3, 1)
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})
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},
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"sub": func(that *require.Assertions) {
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v := coll.From([]int{0, 1, 2, 3, 4, 5, 6})
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v1 := v.Clone().Sub(2, 4)
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that.Equal(2, v1.Len())
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that.Equal([]int{2, 3}, v1.Slice())
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v2 := v.Clone().Sub(2, 5)
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that.Equal(3, v2.Len())
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that.Equal([]int{2, 3, 4}, v2.Slice())
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v3 := v.Clone().Sub(5, -1)
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that.Equal(2, v3.Len())
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that.Equal([]int{5, 6}, v3.Slice())
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v4 := v.Clone().Sub(-1, 2)
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that.Equal(2, v4.Len())
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that.Equal([]int{0, 1}, v4.Slice())
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that.Panics(func() {
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v.Sub(0, 1000)
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})
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that.Panics(func() {
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v.Sub(4000, 4002)
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})
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that.Panics(func() {
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v.Sub(2, 1)
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})
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},
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}
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for name, test := range tests {
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t.Run(name, func(tt *testing.T) {
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test(require.New(tt))
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})
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}
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}
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