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Apache-2.0\n\nCopyright (c) 2018 The Stdlib Authors.\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n   http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n--\u003e\n\n\n\u003cdetails\u003e\n  \u003csummary\u003e\n    About stdlib...\n  \u003c/summary\u003e\n  \u003cp\u003eWe believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.\u003c/p\u003e\n  \u003cp\u003eThe library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.\u003c/p\u003e\n  \u003cp\u003eWhen you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.\u003c/p\u003e\n  \u003cp\u003eTo join us in bringing numerical computing to the web, get started by checking us out on \u003ca href=\"https://github.com/stdlib-js/stdlib\"\u003eGitHub\u003c/a\u003e, and please consider \u003ca href=\"https://opencollective.com/stdlib\"\u003efinancially supporting stdlib\u003c/a\u003e. We greatly appreciate your continued support!\u003c/p\u003e\n\u003c/details\u003e\n\n# Circular Array Stream\n\n[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] \u003c!-- [![dependencies][dependencies-image]][dependencies-url] --\u003e\n\n\u003e Create a [readable stream][readable-stream] from a circular array-like object.\n\n\u003csection class=\"installation\"\u003e\n\n## Installation\n\n```bash\nnpm install @stdlib/streams-node-from-circular-array\n```\n\nAlternatively,\n\n-   To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).\n-   If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).\n-   For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).\n\nThe [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.\n\nTo view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.\n\n\u003c/section\u003e\n\n\u003csection class=\"usage\"\u003e\n\n## Usage\n\n```javascript\nvar circularArrayStream = require( '@stdlib/streams-node-from-circular-array' );\n```\n\n\u003ca name=\"circular-array-stream\"\u003e\u003c/a\u003e\n\n#### circularArrayStream( src\\[, options] )\n\nReturns a [readable stream][readable-stream] from an array-like `object` which repeatedly iterates over a provided value's elements.\n\n```javascript\nvar inspectStream = require( '@stdlib/streams-node-inspect-sink' );\n\nvar iStream;\nvar stream;\nvar count;\n\nfunction log( chunk ) {\n    console.log( chunk.toString() );\n    count += 1;\n    if ( count === 20 ) {\n        stream.destroy();\n    }\n}\n\nstream = circularArrayStream( [ 1, 2, 3, 4 ] );\niStream = inspectStream( log );\n\ncount = 0;\nstream.pipe( iStream );\n```\n\nThe function accepts the following `options`:\n\n-   **objectMode**: specifies whether a [stream][stream] should operate in [objectMode][object-mode]. Default: `false`.\n-   **encoding**: specifies how `Buffer` objects should be decoded to `strings`. Default: `null`.\n-   **highWaterMark**: specifies the maximum number of bytes to store in an internal buffer before pausing streaming.\n-   **sep**: separator used to join streamed data. This option is only applicable when a stream is **not** in [objectMode][object-mode]. Default: `'\\n'`.\n-   **serialize**: custom serialization function. This option is only applicable when a stream is **not** in [objectMode][object-mode].\n-   **iter**: number of iterations. Default: `1e308`.\n-   **dir**: iteration direction. If set to `-1`, the stream iterates over elements from right-to-left. Default: `1`.\n\nTo set [stream][stream] `options`,\n\n```javascript\nvar opts = {\n    'objectMode': true,\n    'encoding': 'utf8',\n    'highWaterMark': 64\n};\n\nvar stream = circularArrayStream( [ 1, 2, 3, 4 ], opts );\n```\n\nBy default, the returned [stream][stream] is an infinite stream (i.e., never ends). To limit the number of streamed values, set the `iter` option.\n\n```javascript\nvar inspectStream = require( '@stdlib/streams-node-inspect-sink' );\n\nfunction log( chunk ) {\n    console.log( chunk.toString() );\n}\n\nvar opts = {\n    'iter': 10\n};\nvar stream = circularArrayStream( [ 1, 2, 3, 4 ], opts );\nvar iStream = inspectStream( log );\n\nstream.pipe( iStream );\n```\n\nBy default, when not operating in [objectMode][object-mode], a returned [stream][stream] delineates individual values using a newline character. To specify an alternative separator, set the `sep` option.\n\n```javascript\nvar inspectStream = require( '@stdlib/streams-node-inspect-sink' );\n\nfunction log( chunk ) {\n    console.log( chunk.toString() );\n}\n\nvar stream = circularArrayStream( [ 1, 2, 3, 4 ], {\n    'sep': ',',\n    'iter': 10\n});\n\nvar iStream = inspectStream( log );\n\nstream.pipe( iStream );\n```\n\nBy default, when not operating in [objectMode][object-mode], a returned [stream][stream] serializes values as JSON strings. To specify custom serialization behavior (either to a `string` or `Buffer`), set the `serialize` option.\n\n```javascript\nvar inspectStream = require( '@stdlib/streams-node-inspect-sink' );\n\nfunction serialize( v ) {\n    return 'v::' + v.toString();\n}\n\nfunction log( chunk ) {\n    console.log( chunk.toString() );\n}\n\nvar stream = circularArrayStream( [ 1, 2, 3, 4 ], {\n    'serialize': serialize,\n    'iter': 10\n});\n\nvar iStream = inspectStream( log );\n\nstream.pipe( iStream );\n```\n\n* * *\n\n#### circularArrayStream.factory( \\[options] )\n\nReturns a `function` for creating [readable streams][readable-stream] from array-like objects.\n\n```javascript\nvar opts = {\n    'objectMode': true,\n    'encoding': 'utf8',\n    'highWaterMark': 64\n};\n\nvar createStream = circularArrayStream.factory( opts );\n\nvar stream1 = createStream( [ 1, 2, 3, 4 ] );\nvar stream2 = createStream( [ 5, 6, 7, 8 ] );\n// ...\n```\n\nThe method accepts the same `options` as [`circularArrayStream()`](#circular-array-stream).\n\n* * *\n\n#### circularArrayStream.objectMode( src\\[, options] )\n\nThis method is a convenience function to create [streams][stream] which **always** operate in [objectMode][object-mode].\n\n```javascript\nvar inspectStream = require( '@stdlib/streams-node-inspect-sink' );\n\nfunction log( v ) {\n    console.log( v );\n}\n\nvar opts = {\n    'iter': 10\n};\nvar stream = circularArrayStream.objectMode( [ 1, 2, 3, 4 ], opts );\n\nopts = {\n    'objectMode': true\n};\nvar iStream = inspectStream( opts, log );\n\nstream.pipe( iStream );\n```\n\nThis method accepts the same `options` as [`circularArrayStream()`](#circular-array-stream); however, the method will **always** override the [`objectMode`][object-mode] option in `options`.\n\n\u003c/section\u003e\n\n\u003c!-- /.usage --\u003e\n\n* * *\n\n\u003csection class=\"notes\"\u003e\n\n## Notes\n\n-   In [`objectMode`][object-mode], `null` is a reserved value. If an `array` contains `null` values (e.g., as a means to encode missing values), the stream will prematurely end. Consider an alternative encoding or filter `null` values prior to invocation.\n-   In binary mode, if an `array` contains `undefined` values, the stream will emit an error. Consider providing a custom serialization function or filtering `undefined` values prior to invocation.\n\n\u003c/section\u003e\n\n\u003c!-- /.notes --\u003e\n\n* * *\n\n\u003csection class=\"examples\"\u003e\n\n## Examples\n\n\u003c!-- eslint no-undef: \"error\" --\u003e\n\n```javascript\nvar inspectStream = require( '@stdlib/streams-node-inspect-sink' );\nvar randu = require( '@stdlib/random-base-randu' );\nvar Float64Array = require( '@stdlib/array-float64' );\nvar circularArrayStream = require( '@stdlib/streams-node-from-circular-array' );\n\nfunction log( v ) {\n    console.log( v.toString() );\n}\n\n// Create an array containing uniformly distributed pseudorandom numbers:\nvar arr = new Float64Array( 10 );\n\nvar i;\nfor ( i = 0; i \u003c arr.length; i++ ) {\n    arr[ i ] = randu();\n}\n\n// Convert the array to a stream:\nvar opts = {\n    'objectMode': true,\n    'iter': arr.length * 3\n};\nvar stream = circularArrayStream( arr, opts );\n\n// Create a writable stream for inspecting stream data:\nopts = {\n    'objectMode': true\n};\nvar iStream = inspectStream( opts, log );\n\n// Begin data flow:\nstream.pipe( iStream );\n```\n\n\u003c/section\u003e\n\n\u003c!-- /.examples --\u003e\n\n\u003c!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. --\u003e\n\n\u003csection class=\"related\"\u003e\n\n* * *\n\n## See Also\n\n-   \u003cspan class=\"package-name\"\u003e[`@stdlib/streams-node/from-array`][@stdlib/streams/node/from-array]\u003c/span\u003e\u003cspan class=\"delimiter\"\u003e: \u003c/span\u003e\u003cspan class=\"description\"\u003ecreate a readable stream from an array-like object.\u003c/span\u003e\n-   \u003cspan class=\"package-name\"\u003e[`@stdlib/streams-node/from-iterator`][@stdlib/streams/node/from-iterator]\u003c/span\u003e\u003cspan class=\"delimiter\"\u003e: \u003c/span\u003e\u003cspan class=\"description\"\u003ecreate a readable stream from an iterator.\u003c/span\u003e\n-   \u003cspan class=\"package-name\"\u003e[`@stdlib/streams-node/from-strided-array`][@stdlib/streams/node/from-strided-array]\u003c/span\u003e\u003cspan class=\"delimiter\"\u003e: \u003c/span\u003e\u003cspan class=\"description\"\u003ecreate a readable stream from a strided array-like object.\u003c/span\u003e\n\n\u003c/section\u003e\n\n\u003c!-- /.related --\u003e\n\n\u003c!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --\u003e\n\n\n\u003csection class=\"main-repo\" \u003e\n\n* * *\n\n## Notice\n\nThis package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.\n\nFor more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].\n\n#### Community\n\n[![Chat][chat-image]][chat-url]\n\n---\n\n## License\n\nSee [LICENSE][stdlib-license].\n\n\n## Copyright\n\nCopyright \u0026copy; 2016-2025. The Stdlib [Authors][stdlib-authors].\n\n\u003c/section\u003e\n\n\u003c!-- /.stdlib --\u003e\n\n\u003c!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --\u003e\n\n\u003csection class=\"links\"\u003e\n\n[npm-image]: http://img.shields.io/npm/v/@stdlib/streams-node-from-circular-array.svg\n[npm-url]: https://npmjs.org/package/@stdlib/streams-node-from-circular-array\n\n[test-image]: https://github.com/stdlib-js/streams-node-from-circular-array/actions/workflows/test.yml/badge.svg?branch=main\n[test-url]: https://github.com/stdlib-js/streams-node-from-circular-array/actions/workflows/test.yml?query=branch:main\n\n[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/streams-node-from-circular-array/main.svg\n[coverage-url]: https://codecov.io/github/stdlib-js/streams-node-from-circular-array?branch=main\n\n\u003c!--\n\n[dependencies-image]: https://img.shields.io/david/stdlib-js/streams-node-from-circular-array.svg\n[dependencies-url]: https://david-dm.org/stdlib-js/streams-node-from-circular-array/main\n\n--\u003e\n\n[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg\n[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im\n\n[stdlib]: https://github.com/stdlib-js/stdlib\n\n[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors\n\n[umd]: https://github.com/umdjs/umd\n[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules\n\n[deno-url]: https://github.com/stdlib-js/streams-node-from-circular-array/tree/deno\n[deno-readme]: https://github.com/stdlib-js/streams-node-from-circular-array/blob/deno/README.md\n[umd-url]: https://github.com/stdlib-js/streams-node-from-circular-array/tree/umd\n[umd-readme]: https://github.com/stdlib-js/streams-node-from-circular-array/blob/umd/README.md\n[esm-url]: https://github.com/stdlib-js/streams-node-from-circular-array/tree/esm\n[esm-readme]: https://github.com/stdlib-js/streams-node-from-circular-array/blob/esm/README.md\n[branches-url]: https://github.com/stdlib-js/streams-node-from-circular-array/blob/main/branches.md\n\n[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/streams-node-from-circular-array/main/LICENSE\n\n[stream]: https://nodejs.org/api/stream.html\n\n[object-mode]: https://nodejs.org/api/stream.html#stream_object_mode\n\n[readable-stream]: https://nodejs.org/api/stream.html\n\n\u003c!-- \u003crelated-links\u003e --\u003e\n\n[@stdlib/streams/node/from-array]: https://github.com/stdlib-js/streams-node-from-array\n\n[@stdlib/streams/node/from-iterator]: https://github.com/stdlib-js/streams-node-from-iterator\n\n[@stdlib/streams/node/from-strided-array]: https://github.com/stdlib-js/streams-node-from-strided-array\n\n\u003c!-- \u003c/related-links\u003e --\u003e\n\n\u003c/section\u003e\n\n\u003c!-- /.links --\u003e\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstdlib-js%2Fstreams-node-from-circular-array","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fstdlib-js%2Fstreams-node-from-circular-array","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstdlib-js%2Fstreams-node-from-circular-array/lists"}