{"id":25184578,"url":"https://github.com/xuender/flow","last_synced_at":"2025-04-04T08:40:33.361Z","repository":{"id":256929055,"uuid":"856847821","full_name":"xuender/flow","owner":"xuender","description":"A streaming programming library based on iterators for Go 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flow\n\n[![Action][action-svg]][action-url]\n[![Report Card][goreport-svg]][goreport-url]\n[![codecov][codecov-svg]][codecov-url]\n[![Lines of code][lines-svg]][lines-url]\n[![godoc][godoc-svg]][godoc-url]\n[![License][license-svg]][license-url]\n\nāœØ **`xuender/flow` is a streaming programming library based on `iter` for Go 1.23.**\n\n## ā— Prerequirement\n\n- Go 1.23+\n- Not dependent on other libraries\n\n## šŸš€ Install\n\n```shell\ngo get github.com/xuender/flow@latest\n```\n\n## šŸ’” Usage\n\n### Chain\n\n```go\npackage main\n\nimport (\n \"fmt\"\n\n \"github.com/xuender/flow\"\n \"github.com/xuender/flow/seq\"\n)\n\nfunc main() {\n start := time.Now()\n\n for num :=range flow.Chain(\n seq.Range(100),\n flow.Filter(func(num int) bool { return num%3 == 0 }),\n flow.Skip[int](5),\n flow.Limit[int](4),\n flow.Peek(func(num int) {\n fmt.Println(\"peek\", num)\n time.Sleep(time.Second)\n }),\n flow.Reverse[int](),\n ) {\n fmt.Println(num)\n }\n\n fmt.Printf(\"Chain: %v\\n\", time.Since(start))\n}\n```\n\nOutput:\n\n```shell\npeek 15\npeek 18\npeek 21\npeek 24\n24\n21\n18\n15\nChain: 4s\n```\n\n[[play](https://go.dev/play/p/-qmIigTfHXt)]\n\n### Parallel\n\n```go\npackage main\n\nimport (\n \"fmt\"\n\n \"github.com/xuender/flow\"\n \"github.com/xuender/flow/seq\"\n)\n\nfunc main() {\n start := time.Now()\n\n for num := range flow.Parallel(3,\n seq.Range(100),\n flow.Filter(func(num int) bool { return num%3 == 0 }),\n flow.Skip[int](5),\n flow.Limit[int](4),\n flow.Peek(func(num int) {\n fmt.Println(\"peek\", num)\n time.Sleep(time.Second)\n }),\n flow.Reverse[int](),\n ) {\n fmt.Println(num)\n }\n\n fmt.Printf(\"Parallel: %v\\n\", time.Since(start))\n}\n```\n\nOutput:\n\n```shell\npeek 15\npeek 18\npeek 21\npeek 24\n24\n21\n18\n15\nParallel: 2s\n```\n\n[[play](https://go.dev/play/p/1E76NdEwaoP)]\n\n### seq.Range\n\n```go\npackage main\n\nimport (\n \"fmt\"\n\n \"github.com/xuender/flow/seq\"\n)\n\nfunc main() {\n fmt.Println(\"seq.Range(3)\")\n\n for num := range seq.Range(3) {\n fmt.Println(num)\n }\n\n fmt.Println(\"\\nseq.Range(-2, -6)\")\n\n for num := range seq.Range(-2, -6) {\n fmt.Println(num)\n }\n\n fmt.Println(\"\\nseq.Range(2, 10, 3)\")\n\n for num := range seq.Range(2, 10, 3) {\n fmt.Println(num)\n }\n\n fmt.Println(\"\\nseq.Range(3, 7, 0)\")\n\n for num := range seq.Range(3, 7, 0) {\n fmt.Println(num)\n }\n}\n```\n\nOutput:\n\n```shell\nseq.Range(3)\n0\n1\n2\n\nseq.Range(-2, -6)\n-2\n-3\n-4\n-5\n\nseq.Range(2, 10, 3)\n2\n5\n8\n\nseq.Range(3, 7, 0)\n3\n3\n3\n3\n```\n\n[[play](https://go.dev/play/p/-FZJfetngJY)]\n\n### Flow Functions\n\n| iter.Seq[V] | iter.Seq2[K,V] |\n| ----------- | -------------- |\n| Chain | Chain2 |\n| Parallel | Parallel2 |\n\n### Intermediate Functions\n\n| iter.Seq[V] | iter.Seq2[K,V] | Note |\n| ----------------- | --------------- | ---------------------------- |\n| Append | Append2 | |\n| CenteredMovingAvg | | |\n| Concat | Concat2 | |\n| Distinct | Distinct2 | |\n| DropWhile | DropWhile2 | |\n| Filter | Filter2 | Parallel |\n| Limit | Limit2 | |\n| Map | Map2 | Parallel, Cannot change type |\n| Merge | Merge2 | |\n| MovingAvg | | |\n| Peek | Peek2 | Parallel |\n| Prepend | Prepend2 | |\n| Repeat | Repeat2 | |\n| Reverse | Reverse2 | Collecting |\n| Shuffle | Shuffle2 | Collecting |\n| Skip | Skip2 | |\n| Sort | Sort2 | Collecting |\n| SortFunc | SortFunc2 | Collecting |\n| SortStableFunc | SortStableFunc2 | Collecting |\n| TakeWhile | TakeWhile2 | |\n\n### Terminal Functions\n\n| iter.Seq[V] | iter.Seq2[K,V] |\n| ------------- | -------------- |\n| seq.AllMatch | seq.AllMatch2 |\n| seq.AnyMatch | seq.AnyMatch2 |\n| seq.Clone | seq.Clone2 |\n| seq.Chunk | seq.Chunk2 |\n| seq.Count | seq.Count2 |\n| seq.Each | seq.Each2 |\n| seq.Emit | seq.Emit2 |\n| seq.First | seq.First2 |\n| seq.Last | seq.Last2 |\n| seq.Join | |\n| seq.Max | seq.Max2 |\n| seq.Min | seq.Min2 |\n| seq.NoneMatch | seq.NoneMatch2 |\n| seq.Reduce | seq.Reduce2 |\n| seq.Sum | |\n\n### Other Seq Functions\n\n| iter.Seq[V] | iter.Seq2[K,V] | Note |\n| --------------------- | --------------------- | ------------------------ |\n| seq.Append | seq.Append2 | |\n| seq.CenteredMovingAvg | | Boundary effect at end |\n| seq.Chan | seq.Chan2 | |\n| seq.Concat | seq.Concat2 | |\n| seq.Collect | seq.Collect2 | |\n| seq.Distinct | seq.Distinct2 | |\n| seq.DropWhile | seq.DropWhile2 | |\n| seq.Filter | seq.Filter2 | |\n| seq.FlatMap | | |\n| | seq.Keys | |\n| seq.Limit | seq.Limit2 | |\n| seq.Map | seq.Map2 | |\n| seq.Merge | seq.Merge2 | |\n| seq.MovingAvg | | Boundary effect at start |\n| seq.Partition | seq.Partition2 | Block |\n| seq.Peek | seq.Peek2 | |\n| seq.Prepend | seq.Prepend2 | |\n| seq.Range | seq.Range2 | |\n| seq.Reduce | seq.Reduce2 | |\n| seq.Repeat | seq.Repeat2 | |\n| seq.Reverse | seq.Reverse2 | |\n| seq.Send | seq.Send2 | |\n| seq.Seq | seq.Seq2 | |\n| seq.Shuffle | seq.Shuffle2 | |\n| seq.Skip | seq.Skip2 | |\n| seq.Sorted | seq.Sorted2 | |\n| seq.SortedFunc | seq.SortedFunc2 | |\n| seq.SortedStableFunc | seq.SortedStableFunc2 | |\n| seq.TakeWhile | seq.TakeWhile2 | |\n| seq.ToChans | seq.ToChans2 | |\n| | seq.Tuples | |\n| | seq.Values | |\n| seq.Window | seq.Window2 | |\n| seq.Zip | | |\n\n### Custom Step[V] / Step2[K,V] function\n\nRefer to `Append`, `Sored`, `Filter`, etc.\n\nps: Attention Parallel.\n\n## šŸ‘¤ Contributors\n\n![Contributors][contributors-svg]\n\n## šŸ“ License\n\nĀ© ender, 2024~time.Now\n\n[MIT LICENSE][license-url]\n\n[action-url]: https://github.com/xuender/flow/actions\n[action-svg]: https://github.com/xuender/flow/workflows/Go/badge.svg\n\n[goreport-url]: https://goreportcard.com/report/github.com/xuender/flow\n[goreport-svg]: https://goreportcard.com/badge/github.com/xuender/flow\n\n[codecov-url]: https://codecov.io/gh/xuender/flow\n[codecov-svg]: https://codecov.io/gh/xuender/flow/graph/badge.svg?token=1VAC5OJJZR\n\n[godoc-url]: https://godoc.org/github.com/xuender/flow\n[godoc-svg]: 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