1
0
mirror of https://github.com/MontFerret/ferret.git synced 2025-03-19 21:28:32 +02:00
ferret/pkg/stdlib/arrays/union_distinct.go
Tim Voronov 24d8eedd4c
Feature/doc markup (#543)
* Added release notes

* #509 fixedOCOD typo

* Updated values

* Updated comments

* Changed stdlib docs format

* Changed format of array in docs

* Use 'any' instead of 'value' in docs

* New format for optional params

* Updated docs for testing package

* Added namespace information
2020-08-07 21:49:29 -04:00

56 lines
1.2 KiB
Go

package arrays
import (
"context"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
"github.com/MontFerret/ferret/pkg/runtime/values/types"
)
// UNION_DISTINCT returns the union of all passed arrays with unique values.
// @param {Any[], repeated} arrays - List of arrays to combine.
// @return {Any[]} - All unique array elements combined in a single array, in any order.
func UnionDistinct(_ context.Context, args ...core.Value) (core.Value, error) {
err := core.ValidateArgs(args, 2, core.MaxArgs)
if err != nil {
return values.None, err
}
err = core.ValidateType(args[0], types.Array)
if err != nil {
return values.None, err
}
firstArrLen := args[0].(*values.Array).Length()
result := values.NewArray(len(args) * int(firstArrLen))
hashes := make(map[uint64]bool)
for _, arg := range args {
err := core.ValidateType(arg, types.Array)
if err != nil {
return values.None, err
}
arr := arg.(*values.Array)
arr.ForEach(func(value core.Value, _ int) bool {
h := value.Hash()
_, exists := hashes[h]
if !exists {
hashes[h] = true
result.Push(value)
}
return true
})
}
return result, nil
}