Programming
In the previous post, we looked at the std::is_destructible<T> type trait. Today, let us try to understand another type trait std::is_empty<T>. As per the specification, is_empty<T>::value will return true in the following cases: – The class/struct has no non-static data member – The class/struct does not define a virtual function – The class/struct does not […]
In the last article, I explained the deleted destructor in some detail. Today, I would like to talk about a related construct, a type trait called std::is_destructible. Type traits, defined in the header <type_traits>, are a big help when it comes to implementing template metaprogramming. See this article for a nice introduction to type traits in […]
The iLexicon system can handle active/passive voice conversion of fairly complex English sentences. I gave examples of the underlying verb conjugation mechanism in this article and this one. Today, I am going to give examples of the conversion of complete sentences. Here is an example of active to passive voice conversion: The above is a snapshot […]
Linda, originally proposed by Nicholas Carriero and David Gelernter, is a model of process communication using a small set of well-defined primitives, operating on a tuple space. Interestingly, Sicstus Prolog comes with a library that implements Linda (both Server and Client). I played with it a little bit and really enjoyed it. In this article, I would […]
In the previous article, I showed how we can use ATNs for extracting key information from natural language text. I also pointed out in that article that Definite Clause Grammars (DCG) are a more compact formalism for doing this. That will be the focus of today’s article. For a nice introduction to DCG, read this. […]
After Wood’s paper [1], Augmented Transition Networks (ATN) became popular in the 1970s, for parsing text. An ATN is a generalized transition network with two major enhancements: Support for recursive transitions, including jumping to other ATNs Performing arbitrary actions when edges are traversed Remembering state through the use of registers See the “Further Reading” section at […]
Recently I needed to make use of a C# library (which I had implemented a few years ago) from Sicstus Prolog. Calling C/C++ functions from Sicstus Prolog is fairly well documented. When it comes to C#/.NET, the official documentation recommends the PrologBeans library. After going through the documentation, I felt that it would not work for […]
In the last article, I showed how to generate verb conjugations in the “iLexicon” system. Today, let us see how this idea can be extended to English “phrasal verbs”. According to Wikipedia: “a phrasal verb is a phrase such as turn down or ran into which combines two or three words from different grammatical categories: […]
We have been taught in school that English language has different “tense” forms. To help you quickly recollect, I am listing them in the table below (the verb ‘sleep’ is used as example): No. Tense Form Example Sentence (3rd Person Singular Pronoun) 1 Simple Present She sleeps 2 Simple Past She slept 3 Simple Future […]
Working with word patterns can be an exciting (and challenging) creative activity. Such patterns come into picture while playing word games, solving word puzzles or even writing poetry. It is precisely to facilitate such tasks that I am building my “iLexicon” system. One popular word game goes like this: The first player utters a word, […]
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