Eloquent Javascript Exercise Solutions

eloquent-javascript-exercises.js

// My answers to the exercises in Eloquent Javascript

// Looping a triangle

var myStr = '';

for (var i = 1; i < 7; i++){
  console.log(myStr += "#");
}

// FizzBuzz

function fizzBuzz(num){ 
  
  for (var i = 1; i <= num; i++){    
    if (i % 5 === 0 && i % 3 === 0){      
      console.log("FizzBuzz");     
    } else if (i % 5 === 0){      
      console.log("Buzz");      
    } else if (i % 3 === 0){      
      console.log("Fizz");      
    } else {
      console.log(i); 
    } 
  }
  
}

fizzBuzz(100);

// Chess Board

function chessBoard(num){
  
  for (var i = 0; i < num; i++){
    var myStr = '';
    for (var k = 0; k < num; k++){
     var total = i + k;
     if (total % 2){
       myStr += '#';
     } else {
       myStr += ' ';
     }
    }
    console.log(myStr);
  }
  
}

chessBoard(8);

// Minimum

function min(numOne, numTwo) {
  
  if (numOne < numTwo) {
    return numOne;
  } else {
    return numTwo;
  }
  
}

min(0,10);

// Recursion
// Testing if a number is even

function isEven(number){
  
  if (number === 0) {
    return true;
  } else if (number === 1) {
    return false;
  } else {
    return number > 0 ? isEven(number-2) : isEven(number+2); 
    // continues to add or subtract from the passed number until it is either 0 or 1, then returns true or false
  }
  
}

isEven(10);

// Bean Counting

function countChar(str, char){
  
  count = 0;
  for (var i = 0; i < str.length; i++){
    str.charAt(i) === char ? count++ : count
  }
  return count;
  
}

countChar("kakkerlak", "k");