HoF Complete

practice.js

@@ -1,6 +1,6 @@
 // This repo is optional extra practice to use the underscore functions.
-// Here we'll be writing new functions, but these functions will use 
-// the underscore functions within them. 
+// Here we'll be writing new functions, but these functions will use
+// the underscore functions within them.
 
 /*
  *
@@ -20,30 +20,86 @@ var moreFruits = function(fruits) {
 };
 
 // use _.each to traverse the number array and determine
-// which are multiples of five.
+// how many are multiples of five.
+
+ // Problem Solving Steps
+  // ---------------------------------------------------------------------------
+  //
+  // Interpret the prompt:
+  //
+  // ---------------------------------------------------------------------------
+  // I - array
+  // O - array with multiples of five
+  // C -
+  // E -
+  // ---------------------------------------------------------------------------
+  // Strategy:
+  // use _.each
+  // Pseudocode
+
 var multiplesOfFive = function(numbers) {
+  // create new array
+  var newArr = [];
+  // use _.each
+  _.each(numbers, function(item) {
+    // if the number / 5 = integer and not float then
+    if (item % 5 === 0) {
+      // push it into array
+      newArr.push(item);
+    }
+
+  });
+  return newArr.length;
+  // return new array
 
 };
 
+
+
 /*
  *
  *  _.filter
  *
  */
 
+  // Problem Solving Steps
+  // ---------------------------------------------------------------------------
+  //
+  // Interpret the prompt:
+  //
+  // ---------------------------------------------------------------------------
+  // I -
+  // O -
+  // C -
+  // E -
+  // ---------------------------------------------------------------------------
+  // Strategy:
+  //
+  // Pseudocode
+
+
 // use _.filter to return the fruits array with only the desired fruit.
 var onlyOneFruit = function(fruits, targetFruit) {
-
+  var result = _.filter(fruits, function(item) {
+    return item === targetFruit;
+  });
+  return result;
 };
 
 // use _.filter to return the fruits array with only fruits
 // starting with the letter 'P'.
 var startsWith = function(fruits, letter) {
-
+  var result = _.filter(fruits, function(item) {
+    return item.slice(0, 1) === letter;
+  });
+  return result;
 };
 
 // return a filtered array containing only cookie-type desserts.
 var cookiesOnly = function(desserts) {
+  _.filter(desserts, function(item) {
+    return item.type === 'cookie';
+  });
 
 };
 
@@ -55,27 +111,51 @@ var cookiesOnly = function(desserts) {
 
 // return the total price of all products.
 var sumTotal = function(products) {
-
+  var result = _.reduce(products, function(total, number) {
+    return total + parseFloat(number.price.slice(1));
+  }, 0);
+  return result;
 };
 
 // return an object consisting of dessert types and how many of each.
 // exampleOutput: { dessertType: 3, dessertType2: 1 }
 var dessertCategories = function(desserts) {
-
+  var result = _.reduce(desserts, function(accumulator, number) {
+    if (accumulator[number.type] === undefined) {
+      accumulator[number.type] = 1;
+    } else {
+      accumulator[number.type]++;
+    }
+    return accumulator;
+  }, {});
+  return result;
 };
 
 // given an array of movie data objects,return an array containing
 // movies that came out between 1990 and 2000.
 // TIP: use an array as your accumulator - don't push to an external array!
 var ninetiesKid = function(movies) {
-
+  var result = _.reduce(movies, function(accumulator, movie) {
+    if (movie.releaseYear > 1990 && movie.releaseYear < 2000) {
+      accumulator.push(movie.title);
+    }
+    return accumulator;
+  }, []);
+  return result;
+
 };
 
 // return an boolean stating if there exists a movie with a shorter
 // runtime than your time limit.
 // timeLimit is an integer representing a number of minutes.
 var movieNight = function(movies, timeLimit) {
-
+  var result = _.reduce(movies, function(accumulator, movie) {
+    if (movie.runtime < timeLimit) {
+      accumulator = true;
+    }
+    return accumulator;
+  }, false);
+  return result;
 };
 
 /*
@@ -87,22 +167,38 @@ var movieNight = function(movies, timeLimit) {
 // given an array of strings, use _.map to return a new array containing all
 // strings converted to uppercase letters.
 var upperCaseFruits = function(fruits) {
-
+  _.map(fruits, function(item) {
+    return item.toUpperCase();
+  });
 };
 
 // given an array of dessert objects, return a new array of objects
 // that have a new "glutenFree" property, with a boolean value.
 // TIP: Items that contain flour are not gluten-free.
 var glutenFree = function(desserts) {
-
+  // debugger;
+  _.map(desserts, function(item) {
+    if (item.ingredients.includes('flour')) {
+      return item.glutenFree = false;
+    } else {
+      return item.glutenFree = true;
+    }
+  });
+  // console.log(desserts.forEach(function(item) {
+  //   debugger;
+  //   if (item.hasOwnProperty('glutenFree')) {
+  //     return true;
+  //   }
+  // }));
+  return desserts;
 };
 
 // use _.map to return an array of items with their sale prices, with a new property
 // containing the sale price. round any decimals to 2 places.
 //
 // having trouble with decimals? check out this article:
 // http://adripofjavascript.com/blog/drips/avoiding-problems-with-decimal-math-in-javascript.html
-// 
+//
 /*
 
  example output:
@@ -111,12 +207,18 @@ var glutenFree = function(desserts) {
     {
       id: 1,
       product: 'Olive Oil',
-      price: '$12.1', 
+      price: '$12.1',
       salePrice: '$9.68'
     }
   ];
 
 */
 var applyCoupon = function(groceries, coupon) {
+  debugger;
+  _.map(groceries, function(item) {
+    item.salePrice = parseFloat(item.price.slice(1)) * (1 - coupon);
+    item.salePrice = '$' + item.salePrice.toFixed(2);
+  });
+  return groceries;
 
 };