Code Challenges #18

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BlackBelt2817 wants to merge 22 commits into bloominstituteoftechnology:master from BlackBelt2817:master

brainTeasers/waterJugs.md

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+Diff line change
@@ -1 +1,12 @@
     You have a five-quart jug, a three-quart jug, and an unlimited supply of water (but no measuring cups). How would you come up with exactly four quarts of water? Note that the jugs are oddly shaped, such that filling up exactly "half" of the jug would be impossible.
+    /*
+    fill 3 quart jug (3:3, 5:0)
+    transfer water to 5 quart (3:0, 5:3)
+    fill 3 quart (3:3, 5:3)
+    transfer 2 quarts from 3 to 5 (3:1, 5:5)
+    empty 5 quart (3:1, 5:0)
+    transfer 1 quart to 5 quart (3:0, 5:1)
+    fill 3 quart and transfer to 5 quart (3:0, 5:4)
+    the 5 quart jug now has a total of four quarts of water
+    */

callBackPractice/callBackPractice.js

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+Diff line change
@@ Expand Up / @@ -24,48 +24,76 @@ firstItem(foods, (firstItem) => { @@
       console.log(`The first item is ${firstItem}.`);
     });
+    const firstItem = () => {
+      firstItem(foods);
+    }
     // Write a function called getLength that passes the length of the array into the callback
     getLength(foods, (length) => {
       console.log(`The length of the array is ${length}.`);
     });
+    const getLength = () => {
+      length(foods);
+    }
     // Write a function called last which passes the last item of the array into the callback
     last(foods, (lastItem) => {
       console.log(`The last item in the array is ${lastItem}.`);
     });
+    const last = () => {
+      lastItem(foods);
+    }
     // Write a function called sumNums that adds two numbers and passes the result to the callback
     sumNums(5, 10, (sum) => {
       console.log(`The sum is ${sum}.`);
     });
+    const sumNums = () => {
+    }
     // Write a function called multiplyNums that adds two numbers and passes the result to the callback
     multiplyNums(5, 10, (product) => {
       console.log(`The product is ${product}.`);
     });
+    const multiplyNums = () => {
+    }
     // Write a function called contains that checks if an item is present inside of the given array.
     // Pass true to the callback if it is, otherwise pass false
     contains(foods, 'ribeye', (result) => {
       console.log(result ? 'ribeye is in the array' : 'ribeye is not in the array');
     });
+    const contains = () => {
+    }
     // Write a function called removeDuplicates that removes all duplicate values from the given array.
     // Pass the array to the callback function.  Do not mutate the original array.
     removeDuplicates(foods, (uniqueFoods) => {
       console.log(`foods with duplicates removed: ${uniqueFoods}`);
     });
+    const removeDuplicates = () => {
+    }
     // Write a function called forEach that iterates over the provided array and passes the value and index into the callback.
     forEach(foods, (value, index) => {
       console.log(`${value} is at index ${index}.`);
-    });
+    });

commonCharacters/commonCharacters.js

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+Diff line change
@@ Expand Up / @@ -6,3 +6,16 @@ @@
      * Example: commonCharacters('acexivou', 'aegihobu')  *
      * Returns: 'aeiou'
     */
+    let newArr = [];
+    function commonCharacters(str1, str2){
+        for (var i = 0; i < str1.length; i++) {
+            for (var j = 0; j < str2.length; j++) {
+                if (str1[i] === str2[j] && !newArr.includes(str1[i])) {
+                    newArr.push(str1[i]);
+                }
+            }
+        }
+        return newArr.join('');
+    }
+    console.log(commonCharacters('cat', 'cadillac'));

constructors/constructors.js

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+Diff line change
@@ Expand Up / @@ -20,4 +20,124 @@ @@
      *
      * This is how you would structure the game objects in an actual game
      * application in Unity or another similar framework.
-     */
+     */
+     class NPC {
+        constructor (hp, strength, speed, intelligence, isFriendly, build, attackType, fight) {
+            this.hp = hp;
+            this.strength = strength;
+            this.speed = speed;
+            this.intelligence = intelligence;
+            this.isFriendly = isFriendly;
+            this.build = build;
+            this.attackType = attackType;
+            this.fight = fight;
+        }
+        attack(enemy) {
+            enemy.hp -= (Math.floor(Math.random() * 30));
+            enemy = enemy.toUpperCase();
+            console.log(`${enemy}'s hp is now at ${enemy.hp}!`);
+        }
+     }
+     class Humanoid extends NPC {
+        constructor (roboOrBio, speaksEnglish, speaksOther, faveWeapon) {
+            this.roboOrBio = roboOrBio;
+            this.speaksEnglish = speaksEnglish;
+            this.speaksOther = speaksOther;
+            this.faveWeapon = faveWeapon;
+        }
+     }
+    class Animal extends NPC {
+        constructor (hasHair, isOmnivore, numLegs, hasTail) {
+            this.hasHair = hasHair;
+            this.isOmnivore = isOmnivore;
+            this.numLegs = numLegs;
+            this.hasTail = hasTail;
+        }
+    }
+    class Plant extends NPC {
+        constructor(isPoisonous, isPretty, isTasty, color) {
+            this.isPoisonous = isPoisonous;
+            this.isPretty = isPretty;
+            this.isTasty = isTasty;
+            this.color = color;
+        }
+    }
+    class Human extends Humanoid {
+        constructor (isMultilingual, isMarried, birthCity) {
+            this.isHuman = true;
+            this.isMultilingual = isMultilingual;
+            this.isMarried = isMarried;
+            this.birthCity = birthCity;
+        }
+    }
+    class Elf extends Humanoid {
+        constructor (earType, height, houseStyle) {
+            this.earType = earType;
+            this.height = height;
+            this.houseStyle = houseStyle;
+        }
+    }
+    class Orc extends Humanoid {
+        constructor (naughtyOrNice, fightingStyle) {
+            this.naughtyOrNice = naughtyOrNice;
+            this.fightingStyle = fightingStyle;
+        }
+    }
+    class Bear extends Animal {
+        constructor (wildOrTamed, cubOrMama) {
+            this.wildOrTamed = wildOrTamed;
+            this.cubOrMama = cubOrMama;
+        }
+    }
+    class Wolf extends Animal {
+        constructor (howlsAtTheMoon) {
+            this.hasFangs = true;
+            this.howlsAtTheMoon = howlsAtTheMoon;
+        }
+    }
+    class FleshEatingDaisy extends Plant {
+        constructor (name) {
+            this.isPoisonous = true;
+            this.isHorrible = true;
+            this.sucks = true;
+            this.worstFear = 'Roundup';
+            this.name = name;
+            if (this.name !== 'Tulip') {
+                this.name = 'Tulip';
+            }
+        }
+    }
+    class Soldier extends Human {
+        constructor (faveGun, camoColor) {
+            this.isAwesome = true;
+            this.faveGun = faveGun;
+            this.camoColor = camoColor;
+        }
+    }
+    class Peasant extends Soldier {
+        constructor (isHungry, isLoyal) {
+            this.isHungry = isHungry;
+            this.isLoyal = isLoyal;
+        }
+    }
+    class Bandit extends Human {
+        constructor () {
+            this.thief = true;
+        }
+        steal() {
+            console.log('The bandit robbed you and got away!');
+        }
+    }

evenOccurences/evenOccurences.js

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@@ Expand Up / @@ -12,4 +12,21 @@ @@
     const evenOccurence = (arr) => {
       // Your code here.
+      let holder = {};
+      for (var i = 0; i < arr.length; i++) {
+        if (arr[i] in holder) {
+          holder.arr[i]++;
+        } else {
+          holder.arr[i] = 1;
+        }
+      }
+      for (var j = 0; j < holder.length; j++) {
+        if (holder.j % 2 === 0) {
+          return j;
+        }
+      }
+      return null;
     };
+    const otherArr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 6, 2, 8, 3, 6, 4];
+    console.log(evenOccurence(otherArr));

forLoopTimeout/forLoopTimeout.js

-Original file line number
+Diff line change
@@ Expand Up / @@ -4,10 +4,21 @@ @@
     // The output should be 1, 2, 3, .... 10. Right now it just prints 11.
     // I've been asked this three times in separate interviews.
+    //----------------ES5--------------------
     for (var i = 1; i <= 10; i++) {
     	setTimeout(function() {
-    		// From looking at the code you would assume it would print 1 - 10
-    		// It doesn't.  Why?  How can you make it print 1 - 10.
-    		console.log(i);
+    		console.log(i - 10);
+    		i++;
     	}, 0);
+    }
+    //-----------ES6--------------
+    for (let i = 1; i <= 10; i++) {
+    	setTimeout(function() {
+    		console.log(i);
+    	}, 0);
     }

isUnique/isUnique.js

-Original file line number
+Diff line change
@@ -1,3 +1,49 @@
     /* Implement an algorithm to determine if a string has all unique characters.
      * What if you cannot use additional data structures?
-     */
+     */
+     /*
+    Need to iterate through a string to see if each character is unique
+      -> create new string variable to hold characters as they are separted from the string argument
+      if so, return true
+    otherwise, return false
+     */
+    //If you want to count spaces as characters:
+     const isUnique = (str) => {
+       let newStr = '';
+       for (let i = 0; i < str.length; i++) {
+         if(newStr.includes(str.charAt(i))) {
+           return false;
+         } else {
+           newStr += str.charAt(i);
+         }
+       }
+       return true;
+     }
+    console.log(isUnique('hello'));
+    console.log(isUnique('hey there'));
+    console.log(isUnique('name'));
+    console.log(isUnique('orange'));
+    console.log(isUnique('Hi man bro'));
+    //Otherwise:
+    const isUniqueOther = (str2) => {
+      let newStr2 = '';
+      for (let i = 0; i < str2.length; i++) {
+        if(newStr2.includes(str2.charAt(i))) {
+          return false;
+        } else if (str2.charAt(i) !== ' ') {
+          newStr2 += str2.charAt(i);
+        }
+      }
+      return true;
+    }
+    console.log(isUniqueOther('hello'));
+    console.log(isUniqueOther('hey there'));
+    console.log(isUniqueOther('name'));
+    console.log(isUniqueOther('orange'));
+    console.log(isUniqueOther('Hi man bro'));

largestPrimePalindrome/largestPrimePalindrome.js

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@@ Expand Up / @@ -3,4 +3,33 @@ @@
      * Hint: it's 929
      * You will first want to determine if the number is a palindrome and then determine if it is prime.
      * A palindrome is a number that is the same forwards and backwards: 121, 323, 123454321, etc.
-     */
+     */
+     function isPalindrome(num) {
+        if ( num.toString() === num.toString().split( '' ).reverse().join( '' ) ) {
+            return true;
+        }
+        return false;
+    }
+    let primesArray = new Array();
+     function isPrime(num) {
+         for ( let i = 2; i < num; i++ ) {
+            if ( num % i === 0 ) {
+                return false;
+            }
+        }
+        return true;
+     }
+     function largestPrimePalindrome() {
+         for (let i = 2; i < 1000; i++) {
+             if( isPalindrome(i) && isPrime(i) ) {
+                primesArray.push(i);
+             }
+         }
+         return primesArray[primesArray.length - 1];
+     }
+    console.log(largestPrimePalindrome());

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