run-forever

Implement run forever by setImmediate() instead of a recursive function which may cause "memory stack overflow"

Install

`` bash
npm install run-forever --save
`

Usage

more example

$3

Parameters:

| parameter | type | description |
| ------------- | ---------------------------- |----------------------------------------------------------------------------------------|
| fn | (previousValue) => Promise | Execution function. forever() exits if returns a promise with END resolved data. |
| previousValue | any | optional. Initialize a previous value to pass through executions |
| callback | (err, previousValue) => void | optional. Invoke the callback if forever() exists |


`typescript
import {forever, END} from 'run-forever';
forever(async i => {
i++;
return i === 10 ? END : i;
},
0,
(err, previousValue) => {
if(err) console.error(err);
else console.log(previousValue);
}
);
console.log('start');
`

$3

Parameters:

| parameter | type | description |
| ------------- | -------------------------- | -------------------------------------------------------------------------------------- |
| fn | (previousValue) => Promise | Execution function. forever() exits if returns a promise with END resolved data. |
| previousValue | any | optional. Initialize a previous value to pass through executions |

Return: Promise with previousValue data

`typescript
import { foreverPromise, END } from 'run-forever';

(async () => {
console.log('start');
const previousValue = await foreverPromise(async (count) => {
count++;
return count === 10 ? END : count;
}, 0);
console.log('forever done ' + previousValue);
})().catch(console.error);
``