Short-circuit evaluation: Difference between revisions

Content added Content deleted

Inline

@@ Line 4,445: / Line 4,445: @@
 T   	F   	OR       	T     	a()
 T   	T   	OR       	T     	a()
+</pre>
+=={{header|Wren}}==
+Wren has the '''&&''' and '''||''' short-circuiting operators found in many C family languages.
+<lang ecmascript>var a = Fn.new { |bool|
+    System.print("  a called")
+    return bool
+}
+var b = Fn.new { |bool|
+    System.print("  b called")
+    return bool
+}
+var bools = [ [true, true], [true, false], [false, true], [false, false] ]
+for (bool in bools) {
+    System.print("a = %(bool[0]), b = %(bool[1]), op = && :")
+    a.call(bool[0]) && b.call(bool[1])
+    System.print()
+}
+for (bool in bools) {
+    System.print("a = %(bool[0]), b = %(bool[1]), op = || :")
+    a.call(bool[0]) || b.call(bool[1])
+    System.print()
+}</lang>
+{{out}}
+<pre>
+a = true, b = true, op = && :
+  a called
+  b called
+a = true, b = false, op = && :
+  a called
+  b called
+a = false, b = true, op = && :
+  a called
+a = false, b = false, op = && :
+  a called
+a = true, b = true, op = || :
+  a called
+a = true, b = false, op = || :
+  a called
+a = false, b = true, op = || :
+  a called
+  b called
+a = false, b = false, op = || :
+  a called
+  b called
 </pre>