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`asyncro` [](https://www.npmjs.org/package/asyncro) [](https://travis-ci.org/developit/asyncro)\n\nThe same `map()`, `reduce()` & `filter()` you know and love, but with async iterator functions!\n\nDo `fetch()` networking in loops, resolve Promises, anything async goes. Performance-friendly _by default_.\n\n**Here's what it looks like:**\n\n![\"Asyncro](\"https://i.imgur.com/GcykVyN.png\")
\n\n* * *\n\n## What's in the Box\n\n![\"Asyncro](\"https://i.imgur.com/yiiq6Gx.png\")
\n\n* * *\n\n## Installation\n\n```sh\nnpm install --save asyncro\n```\n\n## Import and Usage Example\n\n```js\nimport { map } from 'asyncro';\n\nasync function example() {\n\treturn await map(\n\t\t['foo', 'bar', 'baz'],\n\t\tasync name => fetch('./'+name)\n\t)\n}\n```\n\n## API\n\n\n\n### reduce\n\nInvoke an async reducer function on each item in the given Array,\nwhere the reducer transforms an accumulator value based on each item iterated over.\n**Note:** because `reduce()` is order-sensitive, iteration is sequential.\n\n> This is an asynchronous version of `Array.prototype.reduce()`\n\n**Parameters**\n\n- `array` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** The Array to reduce\n- `reducer` **[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)** Async function, gets passed `(accumulator, value, index, array)` and returns a new value for `accumulator`\n- `accumulator` **\\[any]** Optional initial accumulator value\n\n**Examples**\n\n```javascript\nawait reduce(\n\t['/foo', '/bar', '/baz'],\n\tasync (accumulator, value) => {\n\t\taccumulator[v] = await fetch(value);\n\t\treturn accumulator;\n\t},\n\t{}\n);\n```\n\nReturns **any** final `accumulator` value\n\n### map\n\nInvoke an async transform function on each item in the given Array **in parallel**,\nreturning the resulting Array of mapped/transformed items.\n\n> This is an asynchronous, parallelized version of `Array.prototype.map()`.\n\n**Parameters**\n\n- `array` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** The Array to map over\n- `mapper` **[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)** Async function, gets passed `(value, index, array)`, returns the new value.\n\n**Examples**\n\n```javascript\nawait map(\n\t['foo', 'baz'],\n\tasync v => await fetch(v)\n)\n```\n\nReturns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** resulting mapped/transformed values.\n\n### filter\n\nInvoke an async filter function on each item in the given Array **in parallel**,\nreturning an Array of values for which the filter function returned a truthy value.\n\n> This is an asynchronous, parallelized version of `Array.prototype.filter()`.\n\n**Parameters**\n\n- `array` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** The Array to filter\n- `filterer` **[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)** Async function. Gets passed `(value, index, array)`, returns true to keep the value in the resulting filtered Array.\n\n**Examples**\n\n```javascript\nawait filter(\n\t['foo', 'baz'],\n\tasync v => (await fetch(v)).ok\n)\n```\n\nReturns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** resulting filtered values\n\n### find\n\nInvoke an async function on each item in the given Array **in parallel**,\n returning the first element predicate returns truthy for.\n\n> This is an asynchronous, parallelized version of `Array.prototype.find()`.\n\n**Parameters**\n\n- `array` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** The Array to find\n- `predicate` **[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)** Async function. Gets passed `(value, index, array)`, returns true to be the find result.\n\n**Examples**\n\n```javascript\nawait find(\n\t['foo', 'baz', 'root'],\n\tasync v => (await fetch(v)).name === 'baz'\n)\n```\n\nReturns **any** resulting find value\n\n### every\n\nChecks if predicate returns truthy for **all** elements of collection **in parallel**.\n\n> This is an asynchronous, parallelized version of `Array.prototype.every()`.\n\n**Parameters**\n\n- `array` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** The Array to iterate over.\n- `predicate` **[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)** Async function. Gets passed `(value, index, array)`, The function invoked per iteration.\n\n**Examples**\n\n```javascript\nawait every(\n\t[2, 3],\n\tasync v => (await fetch(v)).ok\n)\n```\n\nReturns **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)** Returns true if **all** element passes the predicate check, else false.\n\n### some\n\nChecks if predicate returns truthy for **any** element of collection **in parallel**.\n\n> This is an asynchronous, parallelized version of `Array.prototype.some()`.\n\n**Parameters**\n\n- `array` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)** The Array to iterate over.\n- `filterer` **[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)** Async function. Gets passed `(value, index, array)`, The function invoked per iteration.\n\n**Examples**\n\n```javascript\nawait some(\n\t['foo', 'baz'],\n\tasync v => (await fetch(v)).ok\n)\n```\n\nReturns **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)** Returns true if **any** element passes the predicate check, else false.\n\n### parallel\n\nInvoke all async functions in an Array or Object **in parallel**, returning the result.\n\n**Parameters**\n\n- `list` **([Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)> | [Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)<[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)>)** Array/Object with values that are async functions to invoke.\n\n**Examples**\n\n```javascript\nawait parallel([\n\tasync () => await fetch('foo'),\n\tasync () => await fetch('baz')\n])\n```\n\nReturns **([Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array) \\| [Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object))** same structure as `list` input, but with values now resolved.\n\n### series\n\nInvoke all async functions in an Array or Object **sequentially**, returning the result.\n\n**Parameters**\n\n- `list` **([Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)> | [Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)<[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)>)** Array/Object with values that are async functions to invoke.\n\n**Examples**\n\n```javascript\nawait series([\n\tasync () => await fetch('foo'),\n\tasync () => await fetch('baz')\n])\n```\n\nReturns **([Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array) \\| [Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object))** same structure as `list` input, but with values now resolved.\n\n## License\n\n[MIT](https://oss.ninja/mit/developit)\n","_attachments":{},"homepage":"https://github.com/developit/asyncro","bugs":{"url":"https://github.com/developit/asyncro/issues"},"license":"MIT"}