marrionluaka · August 19, 2018 22:43
diff --git a/apply_discount.js b/apply_discount.js
 const applyDiscount = (price, discount) =>
  moneyToFloat(price) // => Box(3.99)
    .fold(cost => 
           percentToFloat(discount) // => Box(0.15)
              .fold(savings => cost - cost * savings)); // 3.99 - (3.99 * 0.15)
diff --git a/box_functor.js b/box_functor.js
 const Box = x => 
 ({
  map: fn => Box(fn(x)),
  fold: fn => fn(x)
 });
diff --git a/money_to_float_dec.js b/money_to_float_dec.js
 const moneyToFloat = str => 
  Box(str)
    .map(s => s.replace(/\$/g, ""))
    .fold(s => parseFloat(s));
diff --git a/money_to_float_imp.js b/money_to_float_imp.js
 const moneyToFloat = str => parseFloat(str.replace(/\$/g, ""));
diff --git a/money_to_float_map.js b/money_to_float_map.js
 const moneyToFloat = str => 
  Box(str)
    .map(s => s.replace(/\$/g, ""))
    .map(s => parseFloat(s));
diff --git a/percent_to_float.js b/percent_to_float.js
 const percentToFloat = str => 
  Box(str.replace(/\%/g, ""))
    .map(replaced => parseFloat(replaced))
    .map(number => number * 0.01);
diff --git a/results.js b/results.js
 const result = applyDiscount("$3.99", "15%");
 // => 3.3915
	const applyDiscount = (price, discount) =>
	moneyToFloat(price) // => Box(3.99)
	.fold(cost =>
	percentToFloat(discount) // => Box(0.15)
	.fold(savings => cost - cost * savings)); // 3.99 - (3.99 * 0.15)
	const percentToFloat = str =>
	Box(str.replace(/\%/g, ""))
	.map(replaced => parseFloat(replaced))
	.map(number => number * 0.01);