Carina Taveras

problems/objects.js

@@ -6,7 +6,9 @@
  * @returns {number} The number of apples Eve has.
  */
 
-const eveAppleCount = () => {};
+const eveAppleCount = (appleCountByName) => {
+  return appleCountByName["Eve"];
+};
 
 /**
  * Takes in an object with peoples names as the keys and
@@ -22,7 +24,9 @@ const eveAppleCount = () => {};
  * bracket notation? Try them both.
  */
 
-const appleCount = () => {};
+const appleCount = (appleCountByName, name) => {
+  return appleCountByName[name];
+};
 
 /**
  * Takes in an object with peoples names as the keys and
@@ -36,7 +40,10 @@ const appleCount = () => {};
  * @returns {Object} The updated object.
  */
 
-const eveAppleSet = () => {};
+const eveAppleSet = (appleCountByName, appleCount) => {
+  appleCountByName.Eve = appleCount;
+  return appleCountByName;
+};
 
 /**
  * Takes in an object with peoples names as the keys and
@@ -50,7 +57,10 @@ const eveAppleSet = () => {};
  *
  */
 
-const appleSet = () => {};
+const appleSet = (appleCountByName, name, newAppleCount) => {
+  appleCountByName[name] = newAppleCount;
+  return appleCountByName;
+};
 
 /**
  * Takes in an object with peoples names as the keys and
@@ -61,7 +71,9 @@ const appleSet = () => {};
  *
  */
 
-const adamAndEveApples = () => {};
+const adamAndEveApples = (appleCountByName) => {
+  return appleCountByName["Eve"] + appleCountByName["Adam"];
+};
 
 /**
  * Takes in an object with peoples names as the keys and
@@ -72,7 +84,13 @@ const adamAndEveApples = () => {};
  *
  */
 
-const appleSum = () => {};
+const appleSum = (appleCountByName) => {
+  let sum = 0;
+  for (const key in appleCountByName) {
+    sum += appleCountByName[key];
+  }
+  return sum;
+};
 
 /**
  * Takes in an object with peoples names as the keys and
@@ -83,7 +101,12 @@ const appleSum = () => {};
  *
  */
 
-const appleSetToZero = () => {};
+const appleSetToZero = (appleCountByName) => {
+  for (const key in appleCountByName) {
+    appleCountByName[key] = 0;
+  }
+  return appleCountByName;
+};
 
 /**
  * Takes in an object of countries and their capitals.
@@ -93,7 +116,9 @@ const appleSetToZero = () => {};
  * @returns {string} Capital of Russia
  */
 
-const russiaCapital = () => {};
+const russiaCapital = (capitalByCountry) => {
+  return capitalByCountry["Russia"];
+};
 
 /**
  * Takes in an object of countries and their capitals.
@@ -105,7 +130,9 @@ const russiaCapital = () => {};
  * @returns {string} Capital of country
  */
 
-const getCapital = () => {};
+const getCapital = (capitalByCountry, country) => {
+  return capitalByCountry[country];
+};
 
 /**
  * Takes in an object of countries and their capitals
@@ -116,7 +143,10 @@ const getCapital = () => {};
  * @returns {Object} countriesAndCapitals now with Jamaica
  */
 
-const addsJamaica = () => {};
+const addsJamaica = (capitalByCountry) => {
+  capitalByCountry.Jamaica = "Kingston";
+  return capitalByCountry;
+};
 
 /**
  * Takes in an object of countries and their capitals
@@ -130,7 +160,10 @@ const addsJamaica = () => {};
  * @returns {Object} countriesAndCapitals
  */
 
-const addsCountry = () => {};
+const addsCountry = (capitalByCountry, country, capital) => {
+  capitalByCountry[country] = capital;
+  return capitalByCountry;
+};
 
 /**
  * Takes an array of arrays. First element of inner array is authorName, second element
@@ -141,7 +174,13 @@ const addsCountry = () => {};
  * @returns {Object} {"Mark Twain": 8.9, "Nathaniel Hawthorne": 5.1}
  */
 
-const authorScores = () => {};
+const authorScores = (authors) => {
+  let newObj = {}
+  for(let el of authors){
+    newObj[el[0]] = el[1]
+  }
+  return newObj
+}
 
 /**
  * You are given an array of objects.
@@ -151,15 +190,33 @@ const authorScores = () => {};
  * @returns {string} The full name of person with best score.
  */
 
-const bestScore = () => {};
+const bestScore = (submissions) => {
+  let highScore = {score: -Infinity}
+  for(let key of submissions){
+    if(key.score > highScore.score){
+      highScore = key
+    }
+  }
+  return `${highScore.firstName} ${highScore.lastName}`
+};
 
 /**
  * Returns an object where the keys are numbers 1 through 20,
  * and their respective values is key cubed (num * num * num).
  * @returns {Object} {1: 1, 2: 8, 3: 27...}
  */
 
-const cubeObj = () => {};
+const cubeObj = () => {
+  let num = 1
+  let newObj = {}
+  let i = 1
+  while(i <= 20){
+    newObj[i] = num * num * num
+    num++
+    i++
+  }
+  return newObj
+};
 
 /**
  * Takes in a string and returns an object with
@@ -168,7 +225,20 @@ const cubeObj = () => {};
  * @returns {Object} Counts of e and a. {a: 2, e: 1}
  */
 
-const countAandE = () => {};
+const countAandE = (string) => {
+  let str = string.toLowerCase()
+  let count = {
+    "a" : 0,
+    "e" : 0
+  };
+  for (let i = 0; i < str.length; i++) {
+    const el = i
+    if (str[el] === "a" || str[el] === "e") {
+      count[str[el]] += 1
+    } 
+  }
+  return count;
+};
 
 /**
  * Takes in a string and returns an object with
@@ -177,7 +247,18 @@ const countAandE = () => {};
  * @returns {Object} Counts of all characters: {a: 2, g: 1, o: 2, d:1, " ": 2, s: 1, n:1, k:1, e: 1}
  */
 
-const countOccurance = () => {};
+const countOccurance = (str) => {
+  let count = {};
+  for (let i = 0; i < str.length; i++) {
+    const el = str[i].toLocaleLowerCase();
+    if (count[el] !== undefined) {
+      count[el] += 1;
+    } else {
+      count[el] = 1;
+    }
+  }
+  return count;
+};
 
 /**
  * Takes in a string and returns an object with
@@ -187,15 +268,50 @@ const countOccurance = () => {};
  * @returns {Object} Counts all characters except spaces  {a: 2, g: 1, o: 2, d:1, s: 1, n:a, k:1, e: 1}
  */
 
-const countOccuranceNoSpaces = () => {};
+const countOccuranceNoSpaces = (str) => {
+  let newStr = str.split(" ").join("").toLowerCase()
+  let count = { }
+  for(let i = 0; i < newStr.length; i++){
+    const el = newStr[i]
+    if(count[el] !== undefined){
+      count[el] += 1
+    } else {
+      count[el] = 1
+    }
+  } 
+    return count
+};
 
 /**
  * Takes in an array and returns the most common element.
  * @param {Array} array - array of elements
  * @returns {(number|string)} Most common element
  */
 
-const mostCommonElement = () => {};
+const mostCommonElement = (array) => {
+  let obj = {};
+  for (let i = 0; i < array.length; i++) {
+    let element = array[i];
+    if (obj[element]) {
+      obj[element] += 1;
+    } else {
+      obj[element] = 1;
+    }
+  }
+  let mostCommon = -Infinity;
+  let commonElement;
+  for (let key in obj) {
+    if (obj[key] > mostCommon) {
+      mostCommon = obj[key];
+      commonElement = key;
+    }
+  }
+  if (parseInt(commonElement)) {
+    return parseInt(commonElement);
+  } else {
+    return commonElement;
+  }
+};
 
 /**
  * Takes in an object and an array.
@@ -215,8 +331,19 @@ const mostCommonElement = () => {};
  * @returns {string[]} Elements or their pair values.
  */
 
-const updateList = () => {};
-
+const updateList = (pairs, arr) => {
+  let newArr = [];
+  for (let i = 0; i < arr.length; i++) {
+    let artists = arr[i];
+
+    if (pairs[artists]) {
+      newArr.push(pairs[artists]);
+    } else {
+      newArr.push(artists);
+    }
+  }
+  return newArr;
+};
 /**
  * Takes in an object and a key.
  * It should delete the key value pair from the object and
@@ -226,16 +353,24 @@ const updateList = () => {};
  * @returns {Object} The Object without the key.
  */
 
- const deleteKey = () => {};
-
+const deleteKey = (obj, key) => {
+  delete obj[key];
+  return obj;
+};
 
- /**
-  * Takes in an object and returns the number of
-  * properties it has.
-  * @param {Object} obj
-  * @returns {number} Number of properties.
-  */
- const propertyCount = () => {};
+/**
+ * Takes in an object and returns the number of
+ * properties it has.
+ * @param {Object} obj
+ * @returns {number} Number of properties.
+ */
+const propertyCount = (obj) => {
+  let props = 0;
+  for (key in obj) {
+    ++props;
+  }
+  return props;
+};
 
 module.exports = {
   eveAppleCount,