panpsychism/unit_04/w10d02/morning_exercise

WDI-PANTHALASSA

---

Title: Let's Look at the Differences w010d02
Type: Morning Exercise
Duration: "0:45"
Creator:
Original creators: WDI-Archer & WDI-Funke
Adapted by: Kristyn Bryan
Course: WDIr Panthalassa
Competencies: Ruby
Prerequisites: Javascript & Ruby

---

Morning Exercise

##Let's Look at the Differences

Rewrite the following Javascript functions in Ruby

Get Name

var getName = function () {
  var name = prompt("what is your name?");
  return name;
};

###Reverse It

var reverseIt = function () {
  var string = "a man, a plan, a canal, frenemies!";

  var reverse = "";

  for (var i=0; i < string.length; i++) {
    reverse += string[string.length - (i+1)];
  };

  alert(reverse);
};

###Swap Em

var swapEm = function () {
  var a = 10;
  var b = 30;
  var temp;

  temp = b;
  b = a;
  a = temp;

  alert("a is now " + a + ", and b is now " + b);
};

###Multiply Array

var multiplyArray = function (ary) {
  if (ary.length == 0) { return 1; };

  var total = 1;
  // var total = ary[0];

  for (var i=0; i < ary.length; i++) {
    total = total * ary[i];
  };

  return total;
};

Fizz Buzzer

var fizzbuzzer = function(x){
  if( x%(3*5) == 0 ) {
    return 'fizzbuzz'
  } else if( x%3 == 0 ) {
    return 'fizz'
  } else if ( x%5 == 0 ) {
    return 'buzz'
  } else {
    return 'archer'
  }
}

###Nth Fibonacci

var nthFibonacciNumber = function () {
  var fibs = [1, 1];
  var num = prompt("which fibonacci number do you want?");

  while (fibs.length < parseInt(num)) {
    var length = fibs.length;
    var nextFib = fibs[length - 2] + fibs[length - 1];
    fibs.push(nextFib);
  }

  alert(fibs[fibs.length - 1] + " is the fibonacci number at position " + num);
};

Search Array

var searchArray = function(array,value) {
  for(var i = 0; i < array.length-1; i++) {
    if(array[i] == value) {
      return true;
      break;
    }
  }
  return -1;
};

Palindrome

Write a method that checks whether or not a string is a palindrome. Here is the javascript:

var isPalindrome = function(str) {
  for(var i = 0; i < str.length/2; i++){
    if(str[i] != str[str.length-i-1]){
      return false;
      break;
    }
    return true;
  }
};

hasDupes

Write a method that checks whether or not an array has any duplicates. Here is the javascript:

var hasDupes = function(arr){
  var obj = {};
  for (i = 0; i < arr.length; i++) {
    if(obj[arr[i]]) {
      return true;
    }
    else {
      obj[arr[i]] = true;
    }
  }
  return false;
};