Range Iterator (ES)

An ES (JavaScript & TypeScript) module to iterate between range.

🔰 Begin

🎯 Targets

	Remote	JSR	NPM
Bun >= v1.1.0	❌	❓	✔️
Cloudflare Workers	❌	❓	✔️
Deno >= v1.42.0	✔️	✔️	✔️
NodeJS >= v16.13.0	❌	❓	✔️

Note

It is possible to use this module in other methods/ways which not listed in here, however those methods/ways are not officially supported, and should beware maybe cause security issues.

#️⃣ Resources Identifier

Remote - Deno Land:

https://deno.land/x/range_iterator[@{Tag}]/mod.ts

Remote - GitHub Raw:

https://raw.githubusercontent.com/hugoalh-studio/range-iterator-es/{Tag}/mod.ts

JSR:
```
[jsr:]@hugoalh/range-iterator[@{Tag}]
```
NPM:
```
[npm:]@hugoalh/range-iterator[@{Tag}]
```

Note

For usage of remote resources, it is recommended to import the entire module with the main path mod.ts, however it is also able to import part of the module with sub path if available, but do not import if:
- it’s path has an underscore prefix (e.g.: _foo.ts, _util/bar.ts), or
- it is a benchmark or test file (e.g.: foo.bench.ts, foo.test.ts), or
- it’s symbol has an underscore prefix (e.g.: _bar, _foo).
These elements are not considered part of the public API, thus no stability is guaranteed for them.
For usage of JSR or NPM resources, it is recommended to import the entire module with the main entrypoint, however it is also able to import part of the module with sub entrypoint if available, please visit the file jsr.jsonc property exports for available sub entrypoints.
It is recommended to use this module with tag for immutability.

🛡️ Require Runtime Permissions

This module does not require any runtime permission.

🧩 APIs

function rangeIterator(start: bigint, end: bigint, options?: RangeIteratorOptions<bigint>): Generator<bigint>;
function rangeIterator(start: number, end: number, options?: RangeIteratorOptions<number>): Generator<number>;
function rangeIterator(start: string, end: string, options?: RangeIteratorOptions<string>): Generator<string>;
function rangeIterator(start: bigint, end: bigint, step: RangeIteratorIndexType<bigint>): Generator<bigint>;
function rangeIterator(start: number, end: number, step: RangeIteratorIndexType<number>): Generator<number>;
function rangeIterator(start: string, end: string, step: RangeIteratorIndexType<string>): Generator<string>;

interface RangeIteratorOptions<T extends RangeIteratorAcceptType> {
  /**
   * Whether to exclusive end.
   * @default false
   */
  endExclusive?: boolean;
  /**
   * Step of the decrement/increment of the iterate.
   * @default 1n // Big integer.
   * @default 1 // Number/String.
   */
  step?: RangeIteratorIndexType<T>;
}

type RangeIteratorAcceptType = bigint | number | string;

type RangeIteratorIndexType<T extends RangeIteratorAcceptType> = T extends bigint ? bigint : number;

Note

For the prettier documentation, can visit via:

✍️ Examples

Iterate numbers from 1 to 9

Array.from(rangeIterator(1, 9));
//=> [1, 2, 3, 4, 5, 6, 7, 8, 9]

Iterate big integers from 1 to 9 with exclusive end

Array.from(rangeIterator(1n, 9n, { endExclusive: true }));
//=> [1n, 2n, 3n, 4n, 5n, 6n, 7n, 8n]

Iterate numbers from 1 to 9 with increment by 0.5 steps

Array.from(rangeIterator(1, 9, { step: 0.5 }));
//=> [1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9]

Iterate characters from “a” to “z”

Array.from(rangeIterator("a", "z"));
//=> ["a", "b", "c", ... +20 ..., "x", "y", "z"]

Iterate numbers from 9 to 1

Array.from(rangeIterator(9, 1));
//=> [9, 8, 7, 6, 5, 4, 3, 2, 1]

Iterate big integers from 9 to 1 with exclusive end

Array.from(rangeIterator(9n, 1n, { endExclusive: true }));
//=> [9n, 8n, 7n, 6n, 5n, 4n, 3n, 2n]

Iterate numbers from 9 to 1 with decrement by 0.5 steps

Array.from(rangeIterator(9, 1, { step: 0.5 }));
//=> [9, 8.5, 8, 7.5, 7, 6.5, 6, 5.5, 5, 4.5, 4, 3.5, 3, 2.5, 2, 1.5, 1]

Iterate characters from “z” to “a”

Array.from(rangeIterator("z", "a"));
//=> ["z", "y", "x", ... +20 ..., "c", "b", "a"]