Bombay duck Bombay duck The Bombay duck or bummalo ("Harpadon nehereus"), is a lizardfish. Adults may reach a maximum length of 40 cm, but the usual size is around 25 cm. The origin of the term "Bombay duck" is uncertain. One popular etymology relates to railways. When the rail links started on the Indian subcontinent, people from eastern Bengal were made aware of the great availability of the locally prized fish on India's western coasts and began importing them by the railways. Since the smell of the dried fish was overpowering, its transportation was later consigned to the mail train; the Bombay
Type system when called, at run-time. Duck typing differs from structural typing in that, if the "part" (of the whole module structure) needed for a given local computation is present "at runtime", the duck type system is satisfied in its type identity analysis. On the other hand, a structural type system would require the analysis of the whole module structure at compile time to determine type identity or type dependence. Duck typing differs from a nominative type system in a number of aspects. The most prominent ones are that for duck typing, type information is determined at runtime (as contrasted to compile