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maps.go
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maps.go
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package maps
import "github.com/armadaproject/armada/internal/common/interfaces"
// MapValues maps the values of m into valueFunc(v).
func MapValues[M ~map[K]VA, K comparable, VA any, VB any](m M, valueFunc func(VA) VB) map[K]VB {
rv := make(map[K]VB, len(m))
for k, v := range m {
rv[k] = valueFunc(v)
}
return rv
}
// MapKeys maps the keys of m into keyFunc(k).
// Duplicate keys are overwritten.
func MapKeys[M ~map[KA]V, KA comparable, KB comparable, V any](m M, keyFunc func(KA) KB) map[KB]V {
rv := make(map[KB]V, len(m))
for k, v := range m {
rv[keyFunc(k)] = v
}
return rv
}
// Map maps the keys and values of m into keyFunc(k) and valueFunc(v), respectively.
// Duplicate keys are overwritten.
func Map[M ~map[KA]VA, KA comparable, VA any, KB comparable, VB any](m M, keyFunc func(KA) KB, valueFunc func(VA) VB) map[KB]VB {
rv := make(map[KB]VB, len(m))
for k, v := range m {
rv[keyFunc(k)] = valueFunc(v)
}
return rv
}
// DeepCopy returns a deep copy of M.
func DeepCopy[M ~map[K]V, K comparable, V interfaces.DeepCopier[V]](m M) M {
rv := make(M, len(m))
for k, v := range m {
rv[k] = v.DeepCopy()
}
return rv
}
// DeepEqual compares two maps for equality using the Equals() method defined on the values.
func DeepEqual[M ~map[K]V, K comparable, V interfaces.Equaler[V]](a, b M) bool {
if len(a) != len(b) {
return false
}
for k, va := range a {
vb, ok := b[k]
if !ok || !va.Equal(vb) {
return false
}
}
return true
}
// FilterKeys returns a copy of the provided map with any keys for which predicate returns false removed.
func FilterKeys[M ~map[K]V, K comparable, V any](m M, predicate func(K) bool) M {
rv := make(M)
for k, v := range m {
if predicate(k) {
rv[k] = v
}
}
return rv
}
// Filter returns a copy of the provided map with any keys for which predicate returns false removed.
func Filter[M ~map[K]V, K comparable, V any](m M, predicate func(K, V) bool) M {
rv := make(M)
for k, v := range m {
if predicate(k, v) {
rv[k] = v
}
}
return rv
}