langs a-z

Task/Extend-your-language/UNIX-Shell/extend-your-language-3.sh

@@ -0,0 +1,9 @@
+fn if2 cond1 cond2 body11 body10 body01 body00 {
+	# Must evaluate both conditions, and should do so in order.
+	# Negation ensures a boolean result: a true condition becomes
+        # 1 for false; a false condition becomes 0 for true.
+	let (c1 = <={! $cond1}; c2 = <={! $cond2}) {
+		# Use those values to pick the body to evaluate.
+		$(body$c1$c2)
+	}
+}