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https://github.com/IBM/fp-go.git
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46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
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// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ioeither
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import (
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"fmt"
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E "github.com/IBM/fp-go/either"
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F "github.com/IBM/fp-go/function"
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IO "github.com/IBM/fp-go/io"
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)
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func ExampleIOEither_extraction() {
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// IOEither
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someIOEither := Right[error](42)
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eitherValue := someIOEither() // E.Right(42)
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value := E.GetOrElse(F.Constant1[error](0))(eitherValue) // 42
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// Or more directly
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infaillibleIO := GetOrElse(F.Constant1[error](IO.Of(0)))(someIOEither) // => IO.Right(42)
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valueFromIO := infaillibleIO() // => 42
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fmt.Println(eitherValue)
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fmt.Println(value)
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fmt.Println(valueFromIO)
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// Output:
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// Right[<nil>, int](42)
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// 42
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// 42
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}
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