alice.js

/**
 * Can you explain splice for me? I know what it is, 
 * but there aren't many example to use it so I don't understand 
 * everything that goes inside the parentheses
 */

/**
  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
  * Array.splice(x,y)
  * x is what index you start at
  * y is how many items you want to remove
  */

var fruits = ['kiwi', 'apple', 'blueberry'];
fruits.splice(1, 2);
/**
 * apple is in index 1
 * remove two items starting from 'apple'
 * return ['kiwi'];
 */

/**
 * Also, I don't get why this problem was wrong when I was putting in
 * return facebookProfile.friends + 1 &
 * return facebookProfile.friends - 1 
 * I thought ++ was +1 & -- was -1?
 * 
 * Answer:
 * Let's say facebookProfile.friends = 3. 
 * facebookProfile.friends + 1 returns 4.
 * but when you do "facebookProfile.friends", it returns 3. 
 * you didn't add a friend. you just returned a value of friends and added one to it
 * 
 * facebookProfile.friends++ is equal to
 * facebookProfile.friends = facebookProfile.friends + 1
 * you are reassigning facebookProfile.friends to equal its current value (3) plus 1
 * 
 * x + 1 is not a reassignment
 * x++ is a reassignemtn
 * x = x+1 is a reassignment
 */