/*
//
// # The Witch in the Glass
//
// My mother says I must not pass
// Too near that glass;
// She is afraid that I will see
// A little witch that looks like me,
// With a red, red mouth to whisper low
// The very thing I should not know!
//
// Alack for all your mother's care!
// A bird of the air,
// A wistful wind, or (I suppose
// Sent by some hapless boy) a rose,
// With breath too sweet, will whisper low
// The very thing you should not know!
//
// - Sarah Morgan Bryan Piatt
//
*/
// b is for useful stuff
'use strict'
const b = {
pipe: (...args) => args.reduce((acc, el) => el(acc)),
compose: (...fns) => (...args) => fns.reduceRight((res, fn) => [fn.call(null, ...res)], args)[0],
identity: x => x,
curry: (fn) => {
const curried = (...args) => {
if (args.length >= fn.length)
return fn(...args)
else
return (...rest) => curried(...args, ...rest)
}
return curried
},
match: () => b.curry((what, s) => s.match(what)),
replace: () => b.curry((what, replacement, s) => s.replace(what, replacement)),
filter: () => b.curry((f, xs) => xs.filter(f)),
map: () => b.curry((f, xs) => xs.map(f))
};
// // pipe
// const title = '10 Weird Facts About Dogs';
// const toLowerCase = (str) => str.toLowerCase();
// const addHyphens = (str) => str.replace(/\s/g, '-');
// const reverseText = (str) => (str === '') ? '' : reverseText(str.substr(1)) + str.charAt(0);
// const slug = b.pipe(title, toLowerCase, addHyphens, reverseText);
// console.log('pipe ', slug);
// // compose
// const toUpperCase = x => x.toUpperCase();
// const exclaim = x => `${x}!`;
// const shout = b.compose(exclaim, toUpperCase);
// const ret = shout('send in the clowns'); // "SEND IN THE CLOWNS!"
// console.log('compose ', ret);
// // curry family
// const hasLetterR = b.match(/r/g);
// const r1 = hasLetterR('hello world');
// const r2 = hasLetterR('just j and s and t etc');
// const r3 = b.filter(hasLetterR, ['rock and roll', 'smooth jazz']);
// const noVowels = b.replace(/[aeiou]/ig);
// const censored = noVowels('*');
// const r4 = censored('Chocolate Rain');
// console.log('curry ', r1, r2, r3, r4);