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Implement v2 using type aliases (#141)
* fix: initial checkin of v2 Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: slowly migrate IO Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: migrate MonadTraverseArray and TraverseArray Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: migrate traversal Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: complete migration of IO Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: migrate ioeither Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: refactorY Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: next step in migration Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: adjust IO generation code Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: get rid of more IO methods Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: get rid of more IO * fix: convert iooption Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: convert reader Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: convert a bit of reader Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: new build script Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: cleanup Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: reformat Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: simplify Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: some cleanup Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: adjust Pair to Haskell semantic Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: documentation and testcases Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: some performance optimizations Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: remove coverage Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> * fix: better doc Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com> --------- Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
This commit is contained in:
Carsten Leue
GitHub
77
v2/array/zip.go
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77
v2/array/zip.go
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// Copyright (c) 2023 - 2025 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 array
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import (
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G "github.com/IBM/fp-go/v2/array/generic"
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T "github.com/IBM/fp-go/v2/tuple"
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)
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// ZipWith applies a function to pairs of elements at the same index in two arrays,
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// collecting the results in a new array. If one input array is shorter, excess elements
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// of the longer array are discarded.
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//
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// Example:
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//
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// names := []string{"Alice", "Bob", "Charlie"}
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// ages := []int{30, 25, 35}
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//
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// result := array.ZipWith(names, ages, func(name string, age int) string {
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// return fmt.Sprintf("%s is %d years old", name, age)
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// })
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// // Result: ["Alice is 30 years old", "Bob is 25 years old", "Charlie is 35 years old"]
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func ZipWith[FCT ~func(A, B) C, A, B, C any](fa []A, fb []B, f FCT) []C {
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return G.ZipWith[[]A, []B, []C, FCT](fa, fb, f)
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}
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// Zip takes two arrays and returns an array of corresponding pairs (tuples).
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// If one input array is shorter, excess elements of the longer array are discarded.
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//
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// Example:
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//
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// names := []string{"Alice", "Bob", "Charlie"}
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// ages := []int{30, 25, 35}
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//
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// pairs := array.Zip(ages)(names)
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// // Result: [(Alice, 30), (Bob, 25), (Charlie, 35)]
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//
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// // With different lengths
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// pairs2 := array.Zip([]int{1, 2})([]string{"a", "b", "c"})
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// // Result: [(a, 1), (b, 2)]
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func Zip[A, B any](fb []B) func([]A) []T.Tuple2[A, B] {
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return G.Zip[[]A, []B, []T.Tuple2[A, B]](fb)
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}
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// Unzip is the reverse of Zip. It takes an array of pairs (tuples) and returns
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// two corresponding arrays, one containing all first elements and one containing all second elements.
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//
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// Example:
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//
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// import "github.com/IBM/fp-go/v2/tuple"
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//
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// pairs := []tuple.Tuple2[string, int]{
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// tuple.MakeTuple2("Alice", 30),
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// tuple.MakeTuple2("Bob", 25),
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// tuple.MakeTuple2("Charlie", 35),
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// }
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//
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// result := array.Unzip(pairs)
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// // Result: (["Alice", "Bob", "Charlie"], [30, 25, 35])
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// names := result.Head // ["Alice", "Bob", "Charlie"]
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// ages := result.Tail // [30, 25, 35]
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func Unzip[A, B any](cs []T.Tuple2[A, B]) T.Tuple2[[]A, []B] {
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return G.Unzip[[]A, []B, []T.Tuple2[A, B]](cs)
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}
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