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x/rambda/mapAsync.js

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import { _isArray } from './_internals/_isArray'
async function mapAsyncFn(fn, listOrObject){ if (_isArray(listOrObject)){ const willReturn = [] let i = 0 for (const a of listOrObject){ willReturn.push(await fn(a, i++)) }
return willReturn }
const willReturn = {} for (const prop in listOrObject){ willReturn[ prop ] = await fn(listOrObject[ prop ], prop) }
return willReturn}
export function mapAsync(fn, listOrObject){ if (arguments.length === 1){ return async _listOrObject => mapAsyncFn(fn, _listOrObject) }
return new Promise((resolve, reject) => { mapAsyncFn(fn, listOrObject).then(resolve) .catch(reject) })}