Programming
In a series of articles written earlier, I had shown how it is possible to model Definite Clause Grammars (DCG) in LispWorks Lisp (Enterprise Edition). We use defgrammar in Common Prolog (available as part of KnowledgeWorks package) to define our grammar rules. Here is a toy English grammar represented using defgrammar: This corresponds to the following Prolog […]
Lisp is known to be a highly dynamic language, where functions are first-class objects. It is possible to define and undefine functions on the fly as well as attach hooks to existing functions. These are in addition to the ability to pass functions as parameters to other functions and returning a function as the result of […]
A close relative of mine teaches Maths to school students in different Grades. During a casual chat some time ago, he mentioned that he was trying to adopt an automated approach to selecting assignment problems based on each student’s performance so far. Obviously, there are many ways in which this can be done, but he […]
When you program in Rust, especially in a non-trivial project, there is a good chance that you will need to call “external” functions (usually, C/C++) that are available in a DLL (we are talking about the Windows platform here). It could be because you wish to re-use some code that you have earlier written in […]
A few days ago, I purchased Xojo Pro commercial license. In case you haven’t heard about the product, Xojo is a popular cross-platform development tool targeting Desktop, Web and iOS (Android is expected in the near future). It supports an Object-Oriented Basic language. It has been around for over 25 years and has been steadily gaining […]
Traits in Rust are an amazing feature and contribute significantly to the expressive power of the language. For someone coming to Rust with a C++ background (like me), Traits appear to be quite similar to Abstract Classes in C++. Although they are similar, Traits have certain characteristics that set them apart. In this article, I […]
Title: Introducing Blockchain with Lisp: Implement and Extend Blockchains with the Racket Language Author: Boro Sitnikovski Publisher: Apress Year: 2021 Blockchains are a hot topic these days and interestingly, I am getting involved in a project that uses Blockchain. Languages such as C++, Java, Go and Node.js are commonly used in such projects, so when […]
Languages such as C/C++ and Java follow an “eager” argument evaluation approach, where function arguments are evaluated before the function is entered. Of course, there are idioms and tricks that one can use to force “lazy” evaluation. The primary benefit of “lazy” parameter evaluation is that the parameter is evaluated only when it is used and […]
In the last article, I briefly explained how D language has built-in support for performing unit tests. I feel this is an advantage over many current languages. What if we want to run only a subset of unit tests? Although it is a good idea to run the unit tests every time there is a […]
While I admire D language for many of its elegant and powerful features, two features stand out in my opinion. These are support for Design by Contract (DBC) and Unit Testing. I am a great fan of DBC and will cover that feature in a future article. Today I let me briefly touch upon D‘s […]
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