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package cursed
import "golang.org/x/exp/constraints"
func Map[D any](data []D, doer func(D) bool) []D {
var result []D
for _, d := range data {
if doer(d) {
result = append(result, d)
}
}
return result
}
func Reduce[D any](data []D, doer func(D, D) D) D {
var initial D
return Fold[D, D](initial, data, doer)
}
func Fold[T any, U any](initial U, data []T, doer func(T, U) U) U {
acc := initial
for _, d := range data {
temp := doer(d, acc)
acc = temp
}
return acc
}
type Number interface {
constraints.Float | constraints.Integer
}
func Sum[T Number](data []T) T {
return Reduce[T](data, func(x, y T) T {
return x + y
})
}
func Max[T Number](data []T) T {
return Reduce[T](data, func(x, y T) T {
if x > y {
return x
} else if y < x {
return y
} else {
return x // x == y
}
})
}
func Min[T Number](data []T) T {
return Reduce[T](data, func(x, y T) T {
if x > y {
return y
} else if y < x {
return x
} else {
return x // x == y
}
})
}
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