fp-go/function/ternary.go

// Copyright (c) 2023 IBM Corp.
// All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package function

func Ternary[A, B any](pred func(A) bool, onTrue func(A) B, onFalse func(A) B) func(A) B {
	return func(a A) B {
		if pred(a) {
			return onTrue(a)
		}
		return onFalse(a)
	}
}