unary-with-optional-callback

Creates a unary function with an optional transformer callback from a callable and a transformer fallback

Install

npm i unary-with-optional-callback

Usage

var unaryWithOptionalCallback = require('unary-with-optional-callback');

function transformableSqrt(transformer, x) {
  return transformer(Math.sqrt(x));
}

var integerSqrt = unaryWithOptionalCallback(transformableSqrt, Math.floor);

integerSqrt(8); // => 2
integerSqrt(8, Math.ceil); // => 3