More Kotlin vs Java puzzlers

docs/exPuzzlers/kotlin/std.kt

@@ -11,6 +11,12 @@ fun array(vararg array : Float) = array
 
 fun Any?.identityEquals(other : Any?) = this === other
 
+fun <T : Any> T?.npe() : T {
+    if (this == null)
+      throw NullPointerException()
+    return this;
+}
+
 namespace io {
     import java.io.*
 
@@ -46,4 +52,10 @@ namespace io {
     }
     return stdin?.readLine()
     }
+}
+
+namespace string {
+    fun String.replaceAll(pattern : String, replacement : String) : String {
+        return java.util.regex.Pattern.compile(pattern).matcher(this).replaceAll(replacement).npe()
+    }
 }

docs/exPuzzlers/src/_03_character/_14_Escape_Rout/EscapeRout.java

@@ -0,0 +1,12 @@
+package _03_character._14_Escape_Rout;
+
+/**
+ * Bloch, Joshua; Gafter, Neal (2005-06-24). Java™ Puzzlers: Traps, Pitfalls, and Corner Cases (p. 31). Pearson Education (USA). Kindle Edition.
+ */
+public class EscapeRout {
+    public static void main(String[ ] args) {
+        // \u0022 is the Unicode escape for double quote (")
+        System.out.println("a\u0022.length( ) + \u0022b".length( ));
+    }
+}
+

docs/exPuzzlers/src/_03_character/_14_Escape_Rout/EscapeRout.kt

@@ -0,0 +1,12 @@
+namespace escape.rout
+
+import std.io.*
+import std.*
+
+fun main(args : Array<String>) {
+    // \u0022 is the Unicode escape for double quote (")
+    println("a\u0022.length( ) + \u0022b".length)
+
+    // The actual string:
+    println("a\u0022.length( ) + \u0022b")
+}

docs/exPuzzlers/src/_03_character/_15_Hello_Whirled/Test.java

@@ -0,0 +1,16 @@
+package _03_character._15_Hello_Whirled;
+
+// Bloch, Joshua; Gafter, Neal (2005-06-24). Java™ Puzzlers: Traps, Pitfalls, and Corner Cases (p. 33). Pearson Education (USA). Kindle Edition.
+
+/**
+ * Generated by the IBM IDL-to-Java compiler, version 1.0
+ * from F:\TestRoot\apps\a1\ units\include\PolicyHome.idl  <-- DELETE THE SPACE BEFORE 'u'
+ * Wednesday, June 17, 1998 6:44:40 o'clock AM GMT+00:00
+ */
+public class Test {
+    public static void main(String[] args) {
+        System.out.print("Hell");
+        System.out.println("o world");
+    }
+}
+

docs/exPuzzlers/src/_03_character/_15_Hello_Whirled/Test.kt

@@ -0,0 +1,14 @@
+namespace hello.whirled
+
+import std.io.*
+import std.*
+
+/**
+ * Generated by the IBM IDL-to-Java compiler, version 1.0
+ * from F:\TestRoot\apps\a1\units\include\PolicyHome.idl
+ * Wednesday, June 17, 1998 6:44:40 o'clock AM GMT+00:00
+ */
+fun main(args : Array<String>) {
+    print("Hell");
+    println("o world");
+}

docs/exPuzzlers/src/_03_character/_16_Line_Printer/LinePrinter.java

@@ -0,0 +1,13 @@
+package _03_character._16_Line_Printer;
+
+/**
+ * Bloch, Joshua; Gafter, Neal (2005-06-24). Java™ Puzzlers: Traps, Pitfalls, and Corner Cases (p. 35). Pearson Education (USA). Kindle Edition.
+ */
+public class LinePrinter {
+    public static void main(String[] args) {
+        // Note: \ u000A is Unicode representation of linefeed (LF)   <-- DELETE THE SPACE BEFORE 'u'
+        char c = 0x000A;
+        System.out.println(c);
+    }
+}
+

docs/exPuzzlers/src/_03_character/_16_Line_Printer/LinePrinter.kt

@@ -0,0 +1,10 @@
+namespace line.printer
+
+import std.io.*
+import std.*
+
+fun main(args : Array<String>) {
+    // Note: \u000A is Unicode representation of linefeed (LF)
+    val c : Char = 0x000A .chr;
+    println(c);
+}

docs/exPuzzlers/src/_03_character/_17_Huh/Ugly.java

@@ -0,0 +1,18 @@
+package _03_character._17_Huh;
+
+/**
+ * Bloch, Joshua; Gafter, Neal (2005-06-24). Java™ Puzzlers: Traps, Pitfalls, and Corner Cases (p. 37). Pearson Education (USA). Kindle Edition.
+ */
+
+\u0070\u0075\u0062\u006c\u0069\u0063\u0020\u0020\u0020\u0020
+\u0063\u006c\u0061\u0073\u0073\u0020\u0055\u0067\u006c\u0079
+\u007b\u0070\u0075\u0062\u006c\u0069\u0063\u0020\u0020\u0020
+\u0020\u0020\u0020\u0020\u0073\u0074\u0061\u0074\u0069\u0063
+\u0076\u006f\u0069\u0064\u0020\u006d\u0061\u0069\u006e\u0028
+\u0053\u0074\u0072\u0069\u006e\u0067\u005b\u005d\u0020\u0020
+\u0020\u0020\u0020\u0020\u0061\u0072\u0067\u0073\u0029\u007b
+\u0053\u0079\u0073\u0074\u0065\u006d\u002e\u006f\u0075\u0074
+\u002e\u0070\u0072\u0069\u006e\u0074\u006c\u006e\u0028\u0020
+\u0022\u0048\u0065\u006c\u006c\u006f\u0020\u0077\u0022\u002b
+\u0022\u006f\u0072\u006c\u0064\u0022\u0029\u003b\u007d\u007d
+

docs/exPuzzlers/src/_03_character/_17_Huh/Ugly.kt

@@ -0,0 +1 @@
+// You must be kidding

docs/exPuzzlers/src/_03_character/_18_String_Cheese/StringCheese.java

@@ -0,0 +1,16 @@
+package _03_character._18_String_Cheese;
+
+/**
+ * Bloch, Joshua; Gafter, Neal (2005-06-24). Java™ Puzzlers: Traps, Pitfalls, and Corner Cases (p. 39). Pearson Education (USA). Kindle Edition.
+ */
+public class StringCheese {
+    public static void main(String[] args) {
+        byte[] bytes = new byte[256];
+        for (int i = 0; i < 256; i++)
+            bytes[i] = (byte) i;
+        String str = new String(bytes);
+        for (int i = 0, n = str.length(); i < n; i++)
+            System.out.print((int) str.charAt(i) + " ");
+    }
+}
+

docs/exPuzzlers/src/_03_character/_20_Whats_My_Class/Me.java

@@ -0,0 +1,11 @@
+package _03_character._20_Whats_My_Class;
+
+/**
+ * Bloch, Joshua; Gafter, Neal (2005-06-24). Java™ Puzzlers: Traps, Pitfalls, and Corner Cases (p. 43). Pearson Education (USA). Kindle Edition.
+ */
+public class Me {
+    public static void main(String[] args) {
+        System.out.println(Me.class.getName().replaceAll(".", "/") + ".class");
+    }
+}
+

docs/exPuzzlers/src/_03_character/_20_Whats_My_Class/Me.kt

@@ -0,0 +1,19 @@
+namespace whats.my.`class`
+
+import std.io.*
+import std.*
+import std.string.*
+import typeinfo.*
+
+class Me {
+    fun main() {
+        (this as Object).getClass()?.getCanonicalName()?.replaceAll(".", "/")
+    }
+}
+
+fun main(args : Array<String>) {
+    // Note: \u000A is Unicode representation of linefeed (LF)
+    val c : Char = 0x000A .chr;
+    println(c);
+    println("a\u \u0 \u00 \u000 \u0000 \u0AaA \u0AAz.length( ) + \u0022b")
+}