danwang

object Solution {
    def backspaceCompare(left: String, right: String): Boolean = {
        evaluate(left) == evaluate(right)
    }

    def evaluate(s: String, index: Int = 0, soFar: List[Char] = Nil): List[Char] = {
        if (index >= s.length) {
            soFar
        } else {
            val char = s.charAt(index)

danwang

object Solution {
    def backspaceCompare(left: String, right: String): Boolean = {
        sealed trait Character {}
        case object Nothing extends Character
        case object Backspace extends Character
        case object SkippedLetter extends Character
        case class FinalLetter(c: Char) extends Character
        
        case class State(string: String, pointer: Int, backspaces: Int) {
            def charOption: Option[Char] = {

danwang

object Solution {
    def backspaceCompare(left: String, right: String): Boolean = {
        case class State(string: String, pointer: Int, backspaces: Int) {
            def charOption: Option[Char] = {
                if (pointer < 0 || pointer >= string.length) {
                    None
                } else {
                    Some(string.charAt(pointer))
                }
            }

danwang

const nPalindromes = length =>
  parseInt(
    "4" +
      "9".repeat(length - 1) +
      "5" +
      "0".repeat(Math.floor((length - 1) / 2))
  );

danwang

// Option utils
type Some<T> = {
  type: 'some';
  value: T;
};
type None = {
  type: 'none';
};
type Option<T> = Some<T> | None;

danwang

--- ftp_test_suite_framework_update.py	2012-12-07 06:32:36.002404214 -0800
+++ ftp_test_suite_framework_update_2.py	2012-12-07 07:13:16.474522327 -0800
@@ -10,13 +10,13 @@
 1206_704pm
 """
 
-""" 
+"""
 Tests a variety of Passive FTP behaviors.
 * ---------------------------------------------