Typescript promise concurrency utility
npm install mapbymapBy is a typescript promise & concurrency utility for NodeJS.
``
npm i mapby
`typescript
import { mapBy } from 'mapby';
const input = [1, 2, 3];
const result = await mapBy(
input,
{
/ Limit predicate function to be called max N times concurrently /
concurrency: 5,
/ Throw if error is reached, similar to Promise.all /
abortOnError: true,
/ Retry up to N times /
retries: 3,
},
async (item, index) => {
return item * index;
},
(err, item, index) => {
console.error('Error occurred: ', { err, item, index });
},
);
``