Changed QrCode.getModule() in {Java, JavaScript, Python, C++} language versions to return Boolean instead of 0/1 - to match {C, Rust} language versions - and updated comments and usages.

cpp/QrCode.cpp

@@ -159,11 +159,8 @@ int QrCode::getMask() const {
 }
 
 
-int QrCode::getModule(int x, int y) const {
+bool QrCode::getModule(int x, int y) const {
-	if (0 <= x && x < size && 0 <= y && y < size)
+	return 0 <= x && x < size && 0 <= y && y < size && module(x, y);
-		return module(x, y) ? 1 : 0;
-	else
-		return 0;  // Infinite white border
 }
 
 
@@ -180,7 +177,7 @@ std::string QrCode::toSvgString(int border) const {
 	bool head = true;
 	for (int y = -border; y < size + border; y++) {
 		for (int x = -border; x < size + border; x++) {
-			if (getModule(x, y) == 1) {
+			if (getModule(x, y)) {
 				if (head)
 					head = false;
 				else

cpp/QrCode.hpp

@@ -142,10 +142,10 @@ class QrCode final {
 	
 	/* 
 	 * Returns the color of the module (pixel) at the given coordinates, which is either
-	 * 0 for white or 1 for black. The top left corner has the coordinates (x=0, y=0).
+	 * false for white or true for black. The top left corner has the coordinates (x=0, y=0).
-	 * If the given coordinates are out of bounds, then 0 (white) is returned.
+	 * If the given coordinates are out of bounds, then false (white) is returned.
 	 */
-	public: int getModule(int x, int y) const;
+	public: bool getModule(int x, int y) const;
 	
 	
 	/* 

cpp/QrCodeGeneratorDemo.cpp

@@ -168,7 +168,7 @@ static void printQr(const QrCode &qr) {
 	int border = 4;
 	for (int y = -border; y < qr.size + border; y++) {
 		for (int x = -border; x < qr.size + border; x++) {
-			std::cout << (qr.getModule(x, y) == 1 ? "##" : "  ");
+			std::cout << (qr.getModule(x, y) ? "##" : "  ");
 		}
 		std::cout << std::endl;
 	}

cpp/QrCodeGeneratorWorker.cpp

@@ -88,7 +88,7 @@ int main() {
 			std::cout << qr.version << std::endl;
 			for (int y = 0; y < qr.size; y++) {
 				for (int x = 0; x < qr.size; x++)
-					std::cout << qr.getModule(x, y) << std::endl;
+					std::cout << (qr.getModule(x, y) ? 1 : 0) << std::endl;
 			}
 			
 		} catch (const char *msg) {

java/io/nayuki/qrcodegen/QrCode.java

@@ -259,17 +259,14 @@ public final class QrCode {
 	
 	/**
 	 * Returns the color of the module (pixel) at the specified coordinates, which is either
-	 * 0 for white or 1 for black. The top left corner has the coordinates (x=0, y=0).
+	 * false for white or true for black. The top left corner has the coordinates (x=0, y=0).
-	 * If the specified coordinates are out of bounds, then 0 (white) is returned.
+	 * If the specified coordinates are out of bounds, then false (white) is returned.
 	 * @param x the x coordinate, where 0 is the left edge and size−1 is the right edge
 	 * @param y the y coordinate, where 0 is the top edge and size−1 is the bottom edge
-	 * @return the module's color, which is either 0 (white) or 1 (black)
+	 * @return the module's color, which is either false (white) or true (black)
 	 */
-	public int getModule(int x, int y) {
+	public boolean getModule(int x, int y) {
-		if (0 <= x && x < size && 0 <= y && y < size)
+		return 0 <= x && x < size && 0 <= y && y < size && modules[y][x];
-			return modules[y][x] ? 1 : 0;
-		else
-			return 0;  // Infinite white border
 	}
 	
 	
@@ -289,8 +286,8 @@ public final class QrCode {
 		BufferedImage result = new BufferedImage((size + border * 2) * scale, (size + border * 2) * scale, BufferedImage.TYPE_INT_RGB);
 		for (int y = 0; y < result.getHeight(); y++) {
 			for (int x = 0; x < result.getWidth(); x++) {
-				int val = getModule(x / scale - border, y / scale - border);  // 0 or 1
+				boolean val = getModule(x / scale - border, y / scale - border);
-				result.setRGB(x, y, val == 1 ? 0x000000 : 0xFFFFFF);
+				result.setRGB(x, y, val ? 0x000000 : 0xFFFFFF);
 			}
 		}
 		return result;
@@ -318,7 +315,7 @@ public final class QrCode {
 		boolean head = true;
 		for (int y = -border; y < size + border; y++) {
 			for (int x = -border; x < size + border; x++) {
-				if (getModule(x, y) == 1) {
+				if (getModule(x, y)) {
 					if (head)
 						head = false;
 					else

java/io/nayuki/qrcodegen/QrCodeGeneratorWorker.java

@@ -84,7 +84,7 @@ public final class QrCodeGeneratorWorker {
 				System.out.println(qr.version);
 				for (int y = 0; y < qr.size; y++) {
 					for (int x = 0; x < qr.size; x++)
-						System.out.println(qr.getModule(x, y));
+						System.out.println(qr.getModule(x, y) ? 1 : 0);
 				}
 				
 			} catch (IllegalArgumentException e) {

javascript/qrcodegen.js

@@ -35,7 +35,7 @@
  *   - Constructor QrCode(list<int> datacodewords, int mask, int version, QrCode.Ecc ecl)
  *   - Fields int version, size, mask
  *   - Field QrCode.Ecc errorCorrectionLevel
- *   - Method getModule(int x, int y) -> int
+ *   - Method getModule(int x, int y) -> bool
  *   - Method drawCanvas(int scale, int border, HTMLCanvasElement canvas) -> void
  *   - Method toSvgString(int border) -> str
  *   - Enum Ecc:
@@ -115,7 +115,7 @@ var qrcodegen = new function() {
 		} else if (initData instanceof qrcodegen.QrCode) {
 			for (var y = 0; y < size; y++) {
 				for (var x = 0; x < size; x++) {
-					modules[y][x] = initData.getModule(x, y) == 1;
+					modules[y][x] = initData.getModule(x, y);
 					isFunction[y][x] = initData.isFunctionModule(x, y);
 				}
 			}
@@ -164,13 +164,10 @@ var qrcodegen = new function() {
 		/*---- Accessor methods ----*/
 		
 		// (Public) Returns the color of the module (pixel) at the given coordinates, which is either
-		// 0 for white or 1 for black. The top left corner has the coordinates (x=0, y=0).
+		// false for white or true for black. The top left corner has the coordinates (x=0, y=0).
-		// If the given coordinates are out of bounds, then 0 (white) is returned.
+		// If the given coordinates are out of bounds, then false (white) is returned.
 		this.getModule = function(x, y) {
-			if (0 <= x && x < size && 0 <= y && y < size)
+			return 0 <= x && x < size && 0 <= y && y < size && modules[y][x];
-				return modules[y][x] ? 1 : 0;
-			else
-				return 0;  // Infinite white border
 		};
 		
 		// (Package-private) Tests whether the module at the given coordinates is a function module (true) or not (false).
@@ -198,7 +195,7 @@ var qrcodegen = new function() {
 			var ctx = canvas.getContext("2d");
 			for (var y = -border; y < size + border; y++) {
 				for (var x = -border; x < size + border; x++) {
-					ctx.fillStyle = this.getModule(x, y) == 1 ? "#000000" : "#FFFFFF";
+					ctx.fillStyle = this.getModule(x, y) ? "#000000" : "#FFFFFF";
 					ctx.fillRect((x + border) * scale, (y + border) * scale, scale, scale);
 				}
 			}
@@ -219,7 +216,7 @@ var qrcodegen = new function() {
 			var head = true;
 			for (var y = -border; y < size + border; y++) {
 				for (var x = -border; x < size + border; x++) {
-					if (this.getModule(x, y) == 1) {
+					if (this.getModule(x, y)) {
 						if (head)
 							head = false;
 						else

python/qrcodegen-demo.py

@@ -161,7 +161,7 @@ def print_qr(qrcode):
 	border = 4
 	for y in range(-border, qrcode.get_size() + border):
 		for x in range(-border, qrcode.get_size() + border):
-			print(u"\u2588 "[qrcode.get_module(x,y)] * 2, end="")
+			print(u"\u2588 "[1 if qrcode.get_module(x,y) else 0] * 2, end="")
 		print()
 	print()
 

python/qrcodegen-worker.py

@@ -66,7 +66,7 @@ def main():
 			print(qr.get_version())
 			for y in range(qr.get_size()):
 				for x in range(qr.get_size()):
-					print(qr.get_module(x, y))
+					print(1 if qr.get_module(x, y) else 0)
 			
 		except ValueError as e:
 			if e.args[0] != "Data too long":

python/qrcodegen.py

@@ -37,7 +37,7 @@ This module "qrcodegen", public members:
   - Method get_size() -> int
   - Method get_error_correction_level() -> QrCode.Ecc
   - Method get_mask() -> int
-  - Method get_module(int x, int y) -> int
+  - Method get_module(int x, int y) -> bool
   - Method to_svg_str(int border) -> str
   - Enum Ecc:
     - Constants LOW, MEDIUM, QUARTILE, HIGH
@@ -226,9 +226,9 @@ class QrCode(object):
 	
 	def get_module(self, x, y):
 		"""Returns the color of the module (pixel) at the given coordinates, which is either
-		0 for white or 1 for black. The top left corner has the coordinates (x=0, y=0).
+		False for white or True for black. The top left corner has the coordinates (x=0, y=0).
-		If the given coordinates are out of bounds, then 0 (white) is returned."""
+		If the given coordinates are out of bounds, then False (white) is returned."""
-		return 1 if ((0 <= x < self._size) and (0 <= y < self._size) and self._modules[y][x]) else 0
+		return (0 <= x < self._size) and (0 <= y < self._size) and self._modules[y][x]
 	
 	
 	# ---- Public instance methods ----
@@ -241,7 +241,7 @@ class QrCode(object):
 		parts = []
 		for y in range(-border, self._size + border):
 			for x in range(-border, self._size + border):
-				if self.get_module(x, y) == 1:
+				if self.get_module(x, y):
 					parts.append("M{},{}h1v1h-1z".format(x + border, y + border))
 		return """<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

python/setup.py

@@ -100,7 +100,7 @@ Examples:
     border = 4
     for y in range(-border, qr1.get_size() + border):
         for x in range(-border, qr1.get_size() + border):
-            color = qr1.get_module(x, y)  # 0 for white, 1 for black
+            color = qr1.get_module(x, y)  # False for white, True for black
             # (... paint the module onto pixels ...)
 
 More complete set of examples: https://github.com/nayuki/QR-Code-generator/blob/master/python/qrcodegen-demo.py .