Merge pull request #751 from wren-lang/0.3.0-refactor

0.3.0 refactor

example/animals.wren

@@ -1,87 +0,0 @@
-import "io" for Stdin, Stdout
-
-// Implements the classic "Animals" guessing game. The user thinks of an animal.
-// The program asks a series of yes/no questions to try to guess the animal
-// they are thinking of. If the program fails, it asks the user for a new
-// question and adds the animal to its knowledge base.
-//
-// Internally, the program's brain is stored as a binary tree. Leaf nodes are
-// animals. Internal nodes are yes/no questions that choose which branch to
-// explore.
-
-class Node {
-  // Reads a "yes" or "no" (or something approximating) those and returns true
-  // if yes was entered.
-  promptYesNo(prompt) {
-    while (true) {
-      var line = promptString(prompt)
-
-      if (line.startsWith("y") || line.startsWith("Y")) return true
-      if (line.startsWith("n") || line.startsWith("N")) return false
-
-      // Quit.
-      if (line.startsWith("q") || line.startsWith("Q")) Fiber.yield()
-    }
-  }
-
-  // Writes a prompt and reads a string of input.
-  promptString(prompt) {
-    System.write("%(prompt) ")
-    Stdout.flush()
-    return Stdin.readLine()
-  }
-}
-
-class Animal is Node {
-  construct new(name) {
-    _name = name
-  }
-
-  ask() {
-    // Hit a leaf, so see if we guessed it.
-    if (promptYesNo("Is it a %(_name)?")) {
-      System.print("I won! Let's play again!")
-      return null
-    }
-
-    // Nope, so add a new animal and turn this node into a branch.
-    var name = promptString("I lost! What was your animal?")
-    var question = promptString(
-        "What question would distinguish a %(_name) from a %(name)?")
-    var isYes = promptYesNo(
-        "Is the answer to the question 'yes' for a %(name)?")
-    System.print("I'll remember that. Let's play again!")
-
-    var animal = Animal.new(name)
-    return Question.new(question, isYes ? animal : this, isYes ? this : animal)
-  }
-}
-
-class Question is Node {
-  construct new(question, ifYes, ifNo) {
-    _question = question
-    _ifYes = ifYes
-    _ifNo = ifNo
-  }
-
-  ask() {
-    // Recurse into the branches.
-    if (promptYesNo(_question)) {
-      var result = _ifYes.ask()
-      if (result != null) _ifYes = result
-    } else {
-      var result = _ifNo.ask()
-      if (result != null) _ifNo = result
-    }
-
-    return null
-  }
-}
-
-var root = Question.new("Does it live in the water?",
-    Animal.new("frog"), Animal.new("goat"))
-
-// Play games until the user quits.
-Fiber.new {
-  while (true) root.ask()
-}.call()

example/guess_number.wren

@@ -1,23 +0,0 @@
-// The program picks a random number from 1 to 100 and you have to guess it.
-// Each time you guess, it tells you if your guess is too low, too high, or on
-// the money.
-
-import "io" for Stdin
-import "random" for Random
-
-var number = Random.new().int(100) + 1
-
-while (true) {
-  System.write("Guess a number: ")
-  var guess = Num.fromString(Stdin.readLine())
-  if (guess == null) {
-    System.print("That's not a number!")
-  } else if (guess < number) {
-    System.print("Too low.")
-  } else if (guess == number) {
-    System.print("You win!")
-    break
-  } else {
-    System.print("Too high.")
-  }
-}