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| user = { | |
| name: 'Kristine', | |
| favorites: { | |
| food: 'Pizza', | |
| movies: 'Fiddler on the Roof' | |
| } | |
| } | |
| user.dig(:name) # => "Kristine" | |
| user.dig(:favorites) # => {:food=>"Pizza", :movies=>"Fiddler on the Roof"} |
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| class SubArraySplitter { | |
| constructor(arr, num) { | |
| this.arr = arr; | |
| this.num = num; | |
| this.splitArray = []; | |
| this.iterate(); | |
| } | |
| iterate() { | |
| while (this.arr.length > 1) { |
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| const functionalFizzBuzz = n => { | |
| return Array.from( | |
| { length: n }, | |
| (_, idx) => | |
| [[15, "fizzbuzz"], [5, "buzz"], [3, "fizz"]].find( | |
| val => (idx + 1) % val[0] === 0 | |
| ) || idx + 1 | |
| ).reduce((acc, el) => (acc += (el[1] || el) + "\n"), ""); | |
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| const maxStringCounter = str => { | |
| const obj = {}; | |
| const splitStr = str.split("").filter(el => el !== " "); | |
| splitStr.forEach(el => { | |
| if (obj[el]) { | |
| return (obj[el] += 1); | |
| } else { | |
| return (obj[el] = 1); | |
| } |
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| class FlexibleCounter { | |
| constructor(nums, op) { | |
| this.nums = nums; | |
| this.op = op; | |
| this.operatorWhiteList = ["+", "*", "/", "-"]; | |
| } | |
| result() { | |
| if (this.operatorWhiteList.includes(this.op) && !this.nums.some(isNaN)) { | |
| return this.nums.reduce((total, el) => eval(`${total} ${this.op} ${el}`)); |
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| const sample = arr => { | |
| const randomIndex = Math.floor(Math.random() * arr.length); | |
| return arr[randomIndex]; | |
| }; | |
| sample([1, 2, 3]); // 3 | |
| sample([90, 500, 100, -20]); // 500 |
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| const isPalindrome = str => { | |
| return ( | |
| str | |
| .split("") | |
| .reverse() | |
| .join() === str | |
| ); | |
| }; | |
| isPalindrome("tacocat"); // true |
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| const isPalindrome = (str) => { | |
| return str.split('').reverse().join() === str.split('').join(); | |
| } | |
| isPalindrome('tacocat'); // true | |
| isPalindrome('racecar'); // true | |
| isPalindrome('asdf'); // false | |
| isPalindrome('nope'); // false |
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| const userOne = { | |
| firstName: "Kristine", | |
| lastName: "Hudgens" | |
| }; | |
| const userTwo = { | |
| firstName: "Tiffany", | |
| lastName: "Hudgens" | |
| }; |
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| function ageVerification(age) { | |
| // if (age > 25) { | |
| // console.log('can rent a car'); | |
| // } else { | |
| // console.log("can't rent a car"); | |
| // } | |
| return age > 25 ? "can rent a car" : "can't rent a car"; | |
| } |