toMethod.md

Function.prototype.toMethod

The method detach help you to detach method from prototype and convert into a method. The toMethod help you to do the opposite thing, to convert a function into a method.

Usage

import 'https://better-js.fenz.land/src/fp/toMethod.js';

const odd= ( array, base, )=> array.filter( ( item, index, )=> index%base, );

Array.prototype.odd= odd.toMethod();

[ 0, 1, 2, 3, ].odd( 2, ); // [ 1, 3, ]

In this case, the first parameter become this. You can pass a integer to tell which parameter become this:

// with a strange ordered parameter
const strangeSlice= ( start, array, end=Infinity, )=> array.slice( start, end, );

Array.prototype.strangeSlice= strangeSlice.toMethod( 1, );

[ 0, 1, 2, 3, ].strangeSlice( 1, 2, ); // [ 1, ]

We also support negative index:

// tail operation style
const strangeSlice= ( start, end, array, )=> array.slice( start, end, );

Array.prototype.tailSlice= tailSlice.toMethod( -1, );

[ 0, 1, 2, 3, ].tailSlice( 1, 2, ); // [ 1, ]