JS hints

jshints.js

//1. function (let PROP in OBJECT) { do something}
// if OBJECT is a STR => ex: let str = 'abc'
// str is consider as Object str = {0: 'a', 1: 'b', 2:'c'}

//Reverse a String
function reverseString(str) {
  let rStr ='';
  for (let i in str) {
  rStr += str[str.length-1-i]
  }
  return rStr;
}
reverseString("hello"); // 'olleh'

//Finding the longest word in a string
function findLongestWordLength(str) {
 let arr = str.split(' ');
 let newArr = [];
 for(let i=0;i<arr.length;i++) {
   newArr.push(arr[i].length);
   }
let longest = Math.max(...newArr);
  return longest;
}

findLongestWordLength("The quick brown fox jumped over the lazy dog");

//Return largest numbers in an array
function largestOfFour(arr) {
  // You can do this!
let newArr = [];
for(let i=0;i<arr.length; i++) {
newArr.push(Math.max(...arr[i]));
}

  return newArr;
}

largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);

//Confirm the Ending  can be solved with the .endsWith() method
function confirmEnding(str, target) {
  // "Never give up and good luck will find you."
  // -- Falcor
if(str.slice(str.length-target.length) === target) {
  return true;
} else {
  return false;
}
}
confirmEnding("Bastian", "n");

//Truncate a String
function truncateString(str, num) {
  // Clear out that junk in your trunk
  let newStr = '';
  if(str.length>num){
    newStr = `${str.slice(0,num)}...`;
  } else {
    newStr = str;
  }
  return newStr;
}

truncateString("A-tisket a-tasket A green and yellow basket", 8)

//Boo Who
function booWho(bool) {
  // What is the new fad diet for ghost developers? The Boolean.
  if(bool === true | bool === false) {return true}
  else {return false}
  }
booWho(null);


//Title Case a Sentence 
//Note: .toUpperCase & .toLowerCase & str[0] Chỉ return 1 value, nhưng không thay đổi original string.
function titleCase(str) {
   let arr = str.split(' ');
 
  for(let i=0;i<arr.length;i++){
   arr[i] = arr[i].charAt(0).toUpperCase() + arr[i].slice(1).toLowerCase();
  }

let newStr = arr.join(' ');
return newStr;
}

titleCase("I'm a little tea pot");

//slice & splice;
function frankenSplice(arr1, arr2, n) {
  // It's alive. It's alive!
   return arr2.slice(0,n).concat(arr1,arr2.slice(n));
}

frankenSplice([1, 2, 3], [4, 5, 6], 1);

//Falsy Bouncer
function bouncer(arr) {
  // Don't show a false ID to this bouncer.
 /* let newArr = [];
  for(let i in arr) {
    if(Boolean(arr[i]) === true) {
      newArr.push(arr[i]);
    }
  } */

  function checkBoolean(a) {
    return Boolean(a) ===true;
  }
 return  arr.filter(checkBoolean);
 }
bouncer([7, "ate", "", false, 9]);


//Where do I belong
function getIndexToIns(arr, num) {
  // Find my place in this sorted array.
  arr.push(num);
  arr.sort(function(a,b){return a-b});
    return arr.indexOf(num);
}

getIndexToIns([40, 60], 50);

//Mutations
function mutation(arr) {
  let b=true;
  for (let i in arr[1]){
    if(arr[0].toLowerCase().search(arr[1][i].toLowerCase()) === -1)
    {b= false; break;}
        else {b= true};
  }
return b;
}

mutation(["hello", "hey"]);
//Chunky Monkey
function chunkArrayInGroups(arr, size) {
  // Break it up.
  let newArr= [];
  let b = arr.length/size +1;
  for(let i=1; i< b; i++) {
  newArr.push(arr.splice(0,size));
  }
   return newArr;
}
chunkArrayInGroups(["a", "b", "c", "d"], 2);

Intermediate Agrothism

Make Person

var Person = function(firstAndLast) {
  // Complete the method below and implement the others similarly

  this.getFullName = function() {
       return firstAndLast;
  };
  this.getFirstName = function() {
   return firstAndLast.split(' ')[0];
  }
  this.getLastName = function() {
   return firstAndLast.split(' ')[1];
  }
  this.setFirstName = function(first) {
    firstAndLast = first + ' ' + firstAndLast.split(' ')[1];
  }
  this.setLastName = function(last) {
    firstAndLast = firstAndLast.split(' ')[0] + ' ' + last;
  }
  this.setFullName = function(newName) {
    firstAndLast = newName;
  }
  return firstAndLast;
};

var bob = new Person('Bob Ross');
bob.getFullName();