A context-free grammar is a tuple \(G=(V, \Sigma, P, S)\) where \(V\) is a finite set of variables, \(\Sigma\) is an alphabet with a finite set of symbols which are called terminals, \(P\) is a finite set of production rules, …
Language An alphabet \(\Sigma\) is a finite set of symbols, for example \(\Sigma=\{0,1\}\). A string is a finite sequence of symbols from \(\Sigma\). We denote the empty string by \(\epsilon\). The set of all strings over \(\Sigma\) is \(\Sigma^\star\), using …
Search engine optimization (SEO) is the most important marketing strategy for startups. The following are a list of SEO advices for startups, or websites with not too many pages. Unify URLs with 301 Redirect Websites may choose URLs either starting …
An interface in Java represents an abstract type; it is a collection of abstract methods and constants. All methods in an interface are abstract, and thus they have only signatures. All variables in an interface are implicitly final and static, …