beanCounting.js

/*
You can get the Nth character, or letter, from a string by writing
"string".charAt(N) , similar to how you get its length with
"s".length . The returned value will be a string containing only one
character (for example, "b" ). The first character has position zero,
which causes the last one to be found at position string.length - 1 .
In other words, a two-character string has length 2, and its
characters have positions 0 and 1. Write a function countBs that
takes a string as its only argument and returns a number that
indicates how many uppercase “B” characters are in the string.
Next, write a function called countChar that behaves like countBs,
except it takes a second argument that indicates the character
that is to be counted (rather than counting only uppercase “B”
characters). Rewrite countBs to make use of this new function.
*/

//Part one
function countBs(string) {
  count = 0;
  for(var i = 0; i < string.length; i++) {
    if(string.charAt(i) === 'B') {
      count++;
    }
  }
  return count;
}

//Part two
function countChar(string, char) {
  count = 0;
  for(var i = 0; i < string.length; i++) {
    if(string.charAt(i) === char) {
      count++;
    }
  }
  return count;
}