https://github.com/n8brooks/bijective_base

Tools for converting to and from bijective base numbers.
https://github.com/n8brooks/bijective_base

bijective-base-26 columns numeration typescript

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Tools for converting to and from bijective base numbers.

• Host: GitHub
• URL: https://github.com/n8brooks/bijective_base
• Owner: N8Brooks
• License: mit
• Created: 2022-07-08T18:33:55.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-07-11T00:18:32.000Z (over 2 years ago)
• Last Synced: 2024-12-09T18:46:35.210Z (17 days ago)
• Topics: bijective-base-26, columns, numeration, typescript
• Language: TypeScript
• Homepage: https://deno.land/x/bijective_base
• Size: 6.84 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# bijective_base

[![docs](https://doc.deno.land/badge.svg)](https://doc.deno.land/https/deno.land/x/bijective_base/mod.ts)

[![codecov](https://codecov.io/gh/N8Brooks/bijective_base/branch/main/graph/badge.svg?token=ZU38QLNOCG)](https://codecov.io/gh/N8Brooks/bijective_base)

[![build](https://github.com/N8Brooks/bijective_base/actions/workflows/ci.yaml/badge.svg)](https://github.com/N8Brooks/bijective_base/actions/workflows/ci.yaml)

Tools for converting to and from

[bijective numeration](https://en.wikipedia.org/wiki/Bijective_numeration).

## toBijectiveBase26

Converts non-negative integers to bijective base 26.

```ts

import { toBijectiveBase26 } from "https://deno.land/x/bijective_base/mod.ts";

import { assertEquals } from "https://deno.land/std/testing/asserts.ts";

assertEquals(toBijectiveBase26(1), "a");

assertEquals(toBijectiveBase26(2), "b");

assertEquals(toBijectiveBase26(3), "c");

assertEquals(toBijectiveBase26(26), "z");

assertEquals(toBijectiveBase26(27), "aa");

assertEquals(toBijectiveBase26(28), "ab");

assertEquals(toBijectiveBase26(52), "az");

assertEquals(toBijectiveBase26(53), "ba");

assertEquals(toBijectiveBase26(702), "zz");

assertEquals(toBijectiveBase26(703), "aaa");

```

## fromBijectiveBase26

Converts bijective base 26 number to integers.

```ts

import { fromBijectiveBase26 } from "https://deno.land/x/bijective_base/mod.ts";

import { assertEquals } from "https://deno.land/std/testing/asserts.ts";

assertEquals(fromBijectiveBase26("A"), 1);

assertEquals(fromBijectiveBase26("B"), 2);

assertEquals(fromBijectiveBase26("C"), 3);

assertEquals(fromBijectiveBase26("Z"), 26);

assertEquals(fromBijectiveBase26("AA"), 27);

assertEquals(fromBijectiveBase26("AB"), 28);

assertEquals(fromBijectiveBase26("AZ"), 52);

assertEquals(fromBijectiveBase26("BA"), 53);

assertEquals(fromBijectiveBase26("ZZ"), 702);

assertEquals(fromBijectiveBase26("AAA"), 703);

```