![\"TS](\"https://raw.githubusercontent.com/mobily/ts-belt/master/assets/ts-belt-logo.svg\"){kind=logo}
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![\"Marcin](\"https://avatars1.githubusercontent.com/u/1467712?v=4\") Marcin Dziewulski π» π |
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Marcin Dziewulski π» π |
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Marcin Dziewulski π» π |
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Marcin Dziewulski π» π |
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Marcin Dziewulski π» π |
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Marcin Dziewulski π» π |
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\n ![](\"https://raw.githubusercontent.com/mobily/ts-belt/master/assets/ts-belt-frame.png\")
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\n Fast, modern, and practical utility library for FP in TypeScript.\n
\n\n## Documentation\n\nFull documentation can be found [here](https://mobily.github.io/ts-belt/).\n\n## Features\n\n- π built with `ReScript`, which generates highly performant JavaScript code (see the benchmark results [here](https://mobily.github.io/ts-belt/benchmarks/introduction))\n- π provides more readable code, due to the `data-first` approach\n- β¨ supports `TypeScript` and `Flow`\n- π‘ helps you write safer code with `Option` and `Result` types\n- π― all functions return immutable data (no side-effects)\n- π² tree-shakeable\n- π fully documented\n\n## Getting started\n\n### Installation\n\n```shell\nyarn add @mobily/ts-belt\n```\n\nor with `npm`\n\n```shell\nnpm install @mobily/ts-belt --save\n```\n\n### Usage\n\n| Module | Namespace | Description |\n|--|-----------|--|\n| [Array](https://mobily.github.io/ts-belt/api/array) | A | Utility functions for `Array`. |\n| [Boolean](https://mobily.github.io/ts-belt/api/boolean) | B | Utility functions for `Boolean`. |\n| [Number](https://mobily.github.io/ts-belt/api/number) | N | Utility functions for `Number`. |\n| [Object (Dict)](https://mobily.github.io/ts-belt/api/object) | D | Utility functions for `Object`. |\n| [String](https://mobily.github.io/ts-belt/api/string) | S | Utility functions for `String`. |\n| [Guards](https://mobily.github.io/ts-belt/api/guards) | G | Various TypeScript guards. |\n| [Option](https://mobily.github.io/ts-belt/api/option) | O | Functions for handling the `Option` data type that represents the existence and nonexistence of a value. |\n| [Result](https://mobily.github.io/ts-belt/api/result) | R | Functions for describing the result of a certain operation without relying on exceptions. |\n| [Function](https://mobily.github.io/ts-belt/api/function) | F | Other useful functions. |\n\n```typescript\nimport { A, O, N, pipe } from '@mobily/ts-belt'\n\npipe(\n [1, 2, 3, 4, 5], // β [1, 2, 3, 4, 5]\n A.dropExactly(2), // β Some([3, 4, 5])\n O.flatMap(A.head), // β Some(3)\n O.map(N.multiply(10)), // β Some(30)\n O.getWithDefault(0), // β 30\n) // β 30\n```\n\n\n## Contributors\n\n\n\n\n\n \n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Fast, modern, and practical utility library for FP in TypeScript.\n
\n\n## Documentation\n\nFull documentation can be found [here](https://mobily.github.io/ts-belt/).\n\n## Features\n\n- π built with `ReScript`, which generates highly performant JavaScript code (see the benchmark results [here](https://mobily.github.io/ts-belt/benchmarks/introduction))\n- π provides more readable code, due to the `data-first` approach\n- β¨ supports `TypeScript` and `Flow`\n- π‘ helps you write safer code with `Option` and `Result` types\n- π― all functions return immutable data (no side-effects)\n- π² tree-shakeable\n- π fully documented\n\n## Getting started\n\n### Installation\n\n```shell\nyarn add @mobily/ts-belt\n```\n\nor with `npm`\n\n```shell\nnpm install @mobily/ts-belt --save\n```\n\n### Usage\n\n| Module | Namespace | Description |\n|--|-----------|--|\n| [Array](https://mobily.github.io/ts-belt/api/array) | A | Utility functions for `Array`. |\n| [Boolean](https://mobily.github.io/ts-belt/api/boolean) | B | Utility functions for `Boolean`. |\n| [Number](https://mobily.github.io/ts-belt/api/number) | N | Utility functions for `Number`. |\n| [Object (Dict)](https://mobily.github.io/ts-belt/api/object) | D | Utility functions for `Object`. |\n| [String](https://mobily.github.io/ts-belt/api/string) | S | Utility functions for `String`. |\n| [Guards](https://mobily.github.io/ts-belt/api/guards) | G | Various TypeScript guards. |\n| [Option](https://mobily.github.io/ts-belt/api/option) | O | Functions for handling the `Option` data type that represents the existence and nonexistence of a value. |\n| [Result](https://mobily.github.io/ts-belt/api/result) | R | Functions for describing the result of a certain operation without relying on exceptions. |\n| [Function](https://mobily.github.io/ts-belt/api/function) | F | Other useful functions. |\n\n```typescript\nimport { A, O, N, pipe } from '@mobily/ts-belt'\n\npipe(\n [1, 2, 3, 4, 5], // β [1, 2, 3, 4, 5]\n A.dropExactly(2), // β Some([3, 4, 5])\n O.flatMap(A.head), // β Some(3)\n O.map(N.multiply(10)), // β Some(30)\n O.getWithDefault(0), // β 30\n) // β 30\n```\n\n\n## Contributors\n\n\n\n\n\n \n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Fast, modern, and practical utility library for FP in TypeScript.\n
\n\n## Documentation\n\nFull documentation can be found [here](https://mobily.github.io/ts-belt/).\n\n## Features\n\n- π built with `ReScript`, which generates highly performant JavaScript code (see the benchmark results [here](https://mobily.github.io/ts-belt/benchmarks/introduction))\n- π provides more readable code, due to the `data-first` approach\n- β¨ supports `TypeScript` and `Flow`\n- π‘ helps you write safer code with `Option` and `Result` types\n- π― all functions return immutable data (no side-effects)\n- π² tree-shakeable\n- π fully documented\n\n## Getting started\n\n### Installation\n\n```shell\nyarn add @mobily/ts-belt\n```\n\nor with `npm`\n\n```shell\nnpm install @mobily/ts-belt --save\n```\n\n### Usage\n\n| Module | Namespace | Description |\n|--|-----------|--|\n| [Array](https://mobily.github.io/ts-belt/api/array) | A | Utility functions for `Array`. |\n| [Boolean](https://mobily.github.io/ts-belt/api/boolean) | B | Utility functions for `Boolean`. |\n| [Number](https://mobily.github.io/ts-belt/api/number) | N | Utility functions for `Number`. |\n| [Object (Dict)](https://mobily.github.io/ts-belt/api/object) | D | Utility functions for `Object`. |\n| [String](https://mobily.github.io/ts-belt/api/string) | S | Utility functions for `String`. |\n| [Guards](https://mobily.github.io/ts-belt/api/guards) | G | Various TypeScript guards. |\n| [Option](https://mobily.github.io/ts-belt/api/option) | O | Functions for handling the `Option` data type that represents the existence and nonexistence of a value. |\n| [Result](https://mobily.github.io/ts-belt/api/result) | R | Functions for describing the result of a certain operation without relying on exceptions. |\n| [Function](https://mobily.github.io/ts-belt/api/function) | F | Other useful functions. |\n\n```typescript\nimport { A, O, N, pipe } from '@mobily/ts-belt'\n\npipe(\n [1, 2, 3, 4, 5], // β [1, 2, 3, 4, 5]\n A.dropExactly(2), // β Some([3, 4, 5])\n O.flatMap(A.head), // β Some(3)\n O.map(N.multiply(10)), // β Some(30)\n O.getWithDefault(0), // β 30\n) // β 30\n```\n\n\n## Contributors\n\n\n\n\n\n \n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Fast, modern, and practical utility library for FP in TypeScript.\n
\n\n## Documentation\n\nFull documentation can be found [here](https://mobily.github.io/ts-belt/).\n\n## Features\n\n- π built with `ReScript`, which generates highly performant JavaScript code (see the benchmark results [here](https://mobily.github.io/ts-belt/benchmarks/introduction))\n- π provides more readable code, due to the `data-first` approach\n- β¨ supports `TypeScript` and `Flow`\n- π‘ helps you write safer code with `Option` and `Result` types\n- π― all functions return immutable data (no side-effects)\n- π² tree-shakeable\n- π fully documented\n\n## Getting started\n\n### Installation\n\n```shell\nyarn add @mobily/ts-belt\n```\n\nor with `npm`\n\n```shell\nnpm install @mobily/ts-belt --save\n```\n\n### Usage\n\n| Module | Namespace | Description |\n|--|-----------|--|\n| [Array](https://mobily.github.io/ts-belt/api/array) | A | Utility functions for `Array`. |\n| [Boolean](https://mobily.github.io/ts-belt/api/boolean) | B | Utility functions for `Boolean`. |\n| [Number](https://mobily.github.io/ts-belt/api/number) | N | Utility functions for `Number`. |\n| [Object (Dict)](https://mobily.github.io/ts-belt/api/object) | D | Utility functions for `Object`. |\n| [String](https://mobily.github.io/ts-belt/api/string) | S | Utility functions for `String`. |\n| [Guards](https://mobily.github.io/ts-belt/api/guards) | G | Various TypeScript guards. |\n| [Option](https://mobily.github.io/ts-belt/api/option) | O | Functions for handling the `Option` data type that represents the existence and nonexistence of a value. |\n| [Result](https://mobily.github.io/ts-belt/api/result) | R | Functions for describing the result of a certain operation without relying on exceptions. |\n| [Function](https://mobily.github.io/ts-belt/api/function) | F | Other useful functions. |\n\n```typescript\nimport { A, O, N, pipe } from '@mobily/ts-belt'\n\npipe(\n [1, 2, 3, 4, 5], // β [1, 2, 3, 4, 5]\n A.dropExactly(2), // β Some([3, 4, 5])\n O.flatMap(A.head), // β Some(3)\n O.map(N.multiply(10)), // β Some(30)\n O.getWithDefault(0), // β 30\n) // β 30\n```\n\n\n## Contributors\n\n\n\n\n\n \n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Fast, modern, and practical utility library for FP in TypeScript.\n
\n\n## Documentation\n\nFull documentation can be found [here](https://mobily.github.io/ts-belt/).\n\n## Features\n\n- π built with `ReScript`, which generates highly performant JavaScript code (see the benchmark results [here](https://mobily.github.io/ts-belt/benchmarks/introduction))\n- π provides more readable code, due to the `data-first` approach\n- β¨ supports `TypeScript` and `Flow`\n- π‘ helps you write safer code with `Option` and `Result` types\n- π― all functions return immutable data (no side-effects)\n- π² tree-shakeable\n- π fully documented\n\n## Getting started\n\n### Installation\n\n```shell\nyarn add @mobily/ts-belt\n```\n\nor with `npm`\n\n```shell\nnpm install @mobily/ts-belt --save\n```\n\n### Usage\n\n| Module | Namespace | Description |\n|--|-----------|--|\n| [Array](https://mobily.github.io/ts-belt/api/array) | A | Utility functions for `Array`. |\n| [Boolean](https://mobily.github.io/ts-belt/api/boolean) | B | Utility functions for `Boolean`. |\n| [Number](https://mobily.github.io/ts-belt/api/number) | N | Utility functions for `Number`. |\n| [Object (Dict)](https://mobily.github.io/ts-belt/api/object) | D | Utility functions for `Object`. |\n| [String](https://mobily.github.io/ts-belt/api/string) | S | Utility functions for `String`. |\n| [Guards](https://mobily.github.io/ts-belt/api/guards) | G | Various TypeScript guards. |\n| [Option](https://mobily.github.io/ts-belt/api/option) | O | Functions for handling the `Option` data type that represents the existence and nonexistence of a value. |\n| [Result](https://mobily.github.io/ts-belt/api/result) | R | Functions for describing the result of a certain operation without relying on exceptions. |\n| [Function](https://mobily.github.io/ts-belt/api/function) | F | Other useful functions. |\n\n```typescript\nimport { A, O, N, pipe } from '@mobily/ts-belt'\n\npipe(\n [1, 2, 3, 4, 5], // β [1, 2, 3, 4, 5]\n A.dropExactly(2), // β Some([3, 4, 5])\n O.flatMap(A.head), // β Some(3)\n O.map(N.multiply(10)), // β Some(30)\n O.getWithDefault(0), // β 30\n) // β 30\n```\n\n\n## Contributors\n\n\n\n\n\n \n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Fast, modern, and practical utility library for FP in TypeScript.\n
\n\n## Documentation\n\nFull documentation can be found [here](https://mobily.github.io/ts-belt/).\n\n## Features\n\n- π built with `ReScript`, which generates highly performant JavaScript code (see the benchmark results [here](https://mobily.github.io/ts-belt/benchmarks/introduction))\n- π provides more readable code, due to the `data-first` approach\n- β¨ supports `TypeScript` and `Flow`\n- π‘ helps you write safer code with `Option` and `Result` types\n- π― all functions return immutable data (no side-effects)\n- π² tree-shakeable\n- π fully documented\n\n## Getting started\n\n### Installation\n\n```shell\nyarn add @mobily/ts-belt\n```\n\nor with `npm`\n\n```shell\nnpm install @mobily/ts-belt --save\n```\n\n### Usage\n\n| Module | Namespace | Description |\n|--|-----------|--|\n| [Array](https://mobily.github.io/ts-belt/api/array) | A | Utility functions for `Array`. |\n| [Boolean](https://mobily.github.io/ts-belt/api/boolean) | B | Utility functions for `Boolean`. |\n| [Number](https://mobily.github.io/ts-belt/api/number) | N | Utility functions for `Number`. |\n| [Object (Dict)](https://mobily.github.io/ts-belt/api/object) | D | Utility functions for `Object`. |\n| [String](https://mobily.github.io/ts-belt/api/string) | S | Utility functions for `String`. |\n| [Guards](https://mobily.github.io/ts-belt/api/guards) | G | Various TypeScript guards. |\n| [Option](https://mobily.github.io/ts-belt/api/option) | O | Functions for handling the `Option` data type that represents the existence and nonexistence of a value. |\n| [Result](https://mobily.github.io/ts-belt/api/result) | R | Functions for describing the result of a certain operation without relying on exceptions. |\n| [Function](https://mobily.github.io/ts-belt/api/function) | F | Other useful functions. |\n\n```typescript\nimport { A, O, N, pipe } from '@mobily/ts-belt'\n\npipe(\n [1, 2, 3, 4, 5], // β [1, 2, 3, 4, 5]\n A.dropExactly(2), // β Some([3, 4, 5])\n O.flatMap(A.head), // β Some(3)\n O.map(N.multiply(10)), // β Some(30)\n O.getWithDefault(0), // β 30\n) // β 30\n```\n\n\n## Contributors\n\n\n\n\n![\"\"/](\"https://avatars1.githubusercontent.com/u/1467712?v=4?s=100\")
![\"\"/](\"https://avatars.githubusercontent.com/u/902819?v=4?s=100\")
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![\"\"/](\"https://avatars.githubusercontent.com/u/9402280?v=4?s=100\")
![\"\"/](\"https://avatars.githubusercontent.com/u/32049761?v=4?s=100\")
![\"\"/](\"https://avatars.githubusercontent.com/u/26671751?v=4?s=100\")
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![\"\"/](\"https://avatars.githubusercontent.com/u/8270635?v=4?s=100\")
![\"\"/](\"https://avatars.githubusercontent.com/u/12151757?v=4?s=100\")
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![\"\"/](\"https://avatars.githubusercontent.com/u/1902323?v=4?s=100\")