logical

I have always been fascinated by the simplicity of logical operations and how you can express complex logical structures using it.

That's why I wrote this library, to provides a toolset to perform and chain logical operations.

It follows Javascript's default truthy and falsy definitions.

Instalation

You can add this hook as a dependency by running npm install @welingtonms/logical or yarn add @welingtonms/logical.

Supported operations

AND

• Accepts multiple parameters. Evaluation occurs from left to right.

import { and } from '@welingtonms/logical';

and( true, true, true ); // true
and( true, false ); // false

| A | B | Output | | ------- | :-----: | ------: | | true | true | true | | true | false | false | | false | true | false | | false | false | false |

OR

• Accepts multiple parameters. Evaluation occurs from left to right.

import { or } from '@welingtonms/logical';

or( false, false, true ); // true
or( false, false ); // false

| A | B | Output | | ------- | :-----: | ------: | | true | true | true | | true | false | true | | false | true | true | | false | false | false |

XOR

• Accepts two parameters.

import { xor } from '@welingtonms/logical';

xor( true, false ); // true
xor( false, false ); // false

| A | B | Output | | ------- | :-----: | ------: | | true | true | false | | true | false | true | | false | true | true | | false | false | false |

NOT

• Accepts one parameter.

import { not } from '@welingtonms/logical';

xor( true, false ); // true
xor( false, false ); // false

| A | B | Output | | ------- | :-----: | ------: | | true | true | true | | true | false | true | | false | true | true | | false | false | false |

NAND

• Accepts multiple parameters. Evaluation occurs from left to right.

import { nand } from '@welingtonms/logical';

nand( true, true, true ); // true
nand( true, false ); // false

| A | B | Output | | ------- | :-----: | ------: | | true | true | false | | true | false | true | | false | true | true | | false | false | true |

NOR

• Accepts multiple parameters. Evaluation occurs from left to right.

import { nor } from '@welingtonms/logical';

nor( true, true, true ); // true
nor( true, false ); // false

| A | B | Output | | ------- | :-----: | ------: | | true | true | false | | true | false | false | | false | true | false | | false | false | true |

XNOR

• Accepts two parameters.

import { xnor } from '@welingtonms/logical';

xnor( true, false ); // true
xnor( false, false ); // false

| A | B | Output | | ------- | :-----: | ------: | | true | true | true | | true | false | false | | false | true | false | | false | false | true |

Usage guide

You can also chain operations using default export logical.

First you need to call it with the appropriate initial value (which will depend on the operations you will perform).

When you are done chaining operations, you can call value() to get the result.

import logical from '@welingtonms/logical';

console.log( logical( true ).value() ); // true
console.log( logical( false ).value() ); // false

console.log( logical( true ).xor( false ).value() ); // true