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ferret/pkg/stdlib/arrays/remove_value.go
Tim Voronov 1af8b37a0f
New type system (#232)
* New type system

* Fixed dot notation for HTML elements
2019-02-13 12:31:18 -05:00

65 lines
1.3 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"
)
// RemoveValue returns a new array with removed all occurrences of value in a given array.
// Optionally with a limit to the number of removals.
// @param array (Array) - Source array.
// @param value (Read) - Target value.
// @param limit (Int, optional) - A limit to the number of removals.
// @returns (Array) - A new array with removed all occurrences of value in a given array.
func RemoveValue(_ context.Context, args ...core.Value) (core.Value, error) {
err := core.ValidateArgs(args, 2, 3)
if err != nil {
return values.None, err
}
err = core.ValidateType(args[0], types.Array)
if err != nil {
return values.None, err
}
arr := args[0].(*values.Array)
value := args[1]
limit := -1
if len(args) > 2 {
err = core.ValidateType(args[2], types.Int)
if err != nil {
return values.None, err
}
limit = int(args[2].(values.Int))
}
result := values.NewArray(int(arr.Length()))
counter := 0
arr.ForEach(func(item core.Value, idx int) bool {
remove := item.Compare(value) == 0
if remove {
if counter == limit {
result.Push(item)
}
counter++
} else {
result.Push(item)
}
return true
})
return result, nil
}