“Dispatch,” as the more popular term, is tbe more widely accepted spelling of the word. The term refers to a payment of a ship’s owner to a charter party if a certain shipment is late for delivery. “Despatch” as a word actually exists as a functioning term in the shipping industry. “Dispatch” came from the Italian word “dispacciare.” On the other hand, “despatch” was derives from the Spanish “despachar.” The origin of both words is also different. Meanwhile, “dispatch” is the American version of “despatch.” This version is more popular, more commonly used, and regarded as the correct spelling of the word. The British are known to use the word “despatch” rather than “dispatch.” However, this has become rare with the influence of American English throughout the world. The standard form of the word was “dis,” which was introduced in the 1500s and has been in use since.ĭespite the variation in spelling, both words descended from the same Latin root word.Īnother difference is the people and the place the terms are used for. Samuel Johnson, an Englishman, used “des” as the form of the word in his dictionary, A Dictionary of the English Language (written in 1755). The reason for the difference in the spelling and vowel usage began when Dr. The word “dispatch” is spelled with the letter “i,” while “despatch” is spelled with the letter “e.” The main difference between the two terms is in their spelling. As a verb, both terms can be used as transitive verbs. Another context where both terms are used is when it comes to killing someone.īoth “despatch” and “dispatch” can function as both a verb and a noun. The same applies to the object or person being sent. Both words refer to the act of sending something or someone to a specific place regarding a situation. (To a degree, this technique can be simulated using what Smalltalk calls double dispatch, but there's a programming cost and a performance cost.) I believe the languages Cecil, Diesel, and Dylan all use some form of multimethod dispatch, but I'm teetering on the edge of my expertise.“Despatch” and “dispatch” might sound similar, and you might be surprised that the two words also share the same meaning. This idea is sometimes referred to as 'multimethods'.
In more advanced object-oriented languages, the method-dispatch algorithm examines not only the receiver but the arguments that are passed along with the message.
In languages like Self, which have methods but no classes, the method is either found in a named slot on the receiver itself, or possibly is found in the prototype from which the object was cloned. In C++, the method is still determined by the class of the receiver, but because a class can have multiple superclasses, the problem of deciding which method to invoke is more complicated. Otherwise the algorithm checks the unique superclass, and so on. If the method is defined on that class, that method is invoked. Languages like Smalltalk, which have classes and single inheritance, consult the class of the receiver. Algorithms vary dramatically across languages: Method dispatch is the algorithm used to decide which method should be invoked in response to a message. For example, C++ calls a message a 'virtual member function'. These ideas are shared among a wide variety of object-oriented languages, sometimes under different names. The message is withdraw: (Smalltalk syntax.) (Other languages might write account.withdraw(100).) The object receiving the message, in this example account, is called the receiver.Ī method is an implementation that can be invoked in response to a message. First let's say what a message and a method are:Ī message is a name that can be sent from one object to another, possibly with additional objects as arguments.
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