Queue/Definition: Difference between revisions

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 (q 'get)
 ; empty</lang>
+=={{header|Sidef}}==
+<lang ruby>class FIFO(*array) {
+    method pop {
+        self.empty && die "underflow";
+        self[:array].shift;
+    };
+    method push(*items) {
+        self[:array] += items;
+        self;
+    };
+    method empty {
+        self[:array].len == 0;
+    };
+};</lang>
+<lang ruby>var f = FIFO();
+say f.empty;        # true
+f.push('foo');
+f.push('bar', 'baz');
+say f.pop;          # foo
+say f.empty;        # false
+var g = FIFO('xxx', 'yyy');
+say g.pop;          # xxx
+say f.pop;          # bar</lang>
 =={{header|Slate}}==