functional fantasy examples

example-id.js

'use strict'

import Id from 'id'

const func = x => x + 2;
const extFunc = x => x.extract( ) * 10;
const intId = Id.of( 1 );
const arrayId = Id.of( [ 1, 2 ] );
const stringId = Id.of( 'stuff' );
const functionId = Id.of( func );

const equals = intId
    .equals( intId ); // true

// requires arrays
const concat = arrayId
    .concat( arrayId )
    .extract( ); // [1, 2, 1, 2]

const reduce = intId
    .reduce( ( a, b ) => a + b, 1 ); // 2

const map = stringId
    .map( element => element + 'foo' )
    .extract( ); // stufffoo

const ap = functionId
    .ap( intId )
    .extract( ); // 3

const traverse = arrayId
    .traverse( x => x.map( func ) ); // [ Id, Id ]

const chain = intId
    .chain( func ); // 3

const extend = intId
    .extend( extFunc )
    .extract( ); // 10

// ops
const examples = [
    equals,
    concat,
    reduce,
    map,
    ap,
    traverse,
    chain,
    extend
];

examples.map( example => console.log( example ) );