Coding With Fun
Home Docker Django Node.js Articles Python pip guide FAQ Policy

Is the pattern matching construct more than just pattern matching?


Asked by Bryce Sloan on Dec 09, 2021 FAQ



The pattern matching construct is a full conditional logic construct that can do more than just pattern matching. As such, there have been (and there will be more) trade-offs that need to be made. In those cases, we should prioritize the ergonomics of structural pattern matching over other capabilities of this construct.
Besides,
The pattern matching construct is a full conditional logic construct that can do more than just pattern matching. As such, there have been (and there will be more) trade-offs that need to be made. In those cases, we should prioritize the ergonomics of structural pattern matching over other capabilities of this construct.
Next, In computer science, pattern matching is the act of checking a given sequence of tokens for the presence of the constituents of some pattern. In contrast to pattern recognition, the match usually has to be exact: "either it will or will not be a match.". The patterns generally have the form of either sequences...
Likewise,
The match statement will check patterns from top to bottom. If the pattern doesn't match the subject, the next pattern will be tried. However, once the first matching pattern is found, the body of that case is executed, and all further cases are ignored. This is similar to the way that an if/elif/elif/... statement works.
Furthermore,
A pattern is able to do two different things: Verify that the subject has certain structure. In your case, the [action, obj] pattern matches any sequence of exactly two elements. This is called matching It will bind some names in the pattern to component elements of your subject.