You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
22 lines
410 B
JavaScript
22 lines
410 B
JavaScript
4 years ago
|
"use strict";
|
||
|
|
||
|
const simpleSource = require("@ppstreams/simple-source");
|
||
|
const EndOfStream = require("@ppstreams/end-of-stream");
|
||
|
|
||
|
module.exports = function rangeNumbers(start, end, step = 1) {
|
||
|
/* End is exclusive */
|
||
|
let i = start;
|
||
|
|
||
|
return simpleSource({
|
||
|
onRequest: () => {
|
||
|
if (i >= end) {
|
||
|
throw new EndOfStream();
|
||
|
} else {
|
||
|
let number = i;
|
||
|
i += step;
|
||
|
return number;
|
||
|
}
|
||
|
}
|
||
|
});
|
||
|
};
|