Archive for November, 2014

// array = sorted array of integers
// val = pivot element
// dir = boolean, if true, returns the previous value

function getVal(array, val, dir) {
  for (var i=0; i < array.length; i++) {
    if (dir == true) {
      if (array[i] > val){
        return array[i-1] || 0;
      }
    } else {
      if (array[i] >= val) {
        return array[i];
      }
    }
  }
}

Example:

array = [0, 5, 7, 9, 22, 27];
pivot = 11;

getVal(array, pivot);        //returns 22
getVal(array, pivot, true);  //returns 9