Dear R Users, I am happy to announce the initial release (v0.1.3) of lrequire<https://cran.r-project.org/web/packages/lrequire/>, now available on CRAN.
https://cran.r-project.org/web/packages/lrequire/ lrequire supports modularization of R Scripts, enabling encapsulation of information and caching of scripts. This is very similar to the require()<https://nodejs.org/api/modules.html> support in node.js<https://nodejs.org/>. Use of lrequire encourages separation of responsibility and using modules to encapsulate specific functionality. This leads to more easily-maintained scripts and encourages reuse. lrequire also cache loaded modules (scripts) such that the next load (source) of the script does not execute its contents, unless specified. For example, if a module is built around sourcing a slowly-changing dataset that is time-consuming to retrieve, frequent reloads of the module will only return the cached copy of the data, saving the time expense. I found this very useful for developing dashboard components – lrequire permitted me the freedom to keep tweaking the UI without having to wait for the live reload of the data. How It Works Goal: build a reusable module to welcome an individual. Any environment artifacts necessary to build that module are encapsulated in the lrequire() call and only the functionality is returned. For example: ________________________________ File: welcome.R data.that.will.not.be.exposed <- 'some work' hello <- function(person.name) { return (paste0('Hello, ', person.name, '!')) } module.exports = hello ________________________________ File: main.R hello <- lrequire(welcome) hello('Rick') ________________________________ Note that the variable declared in welcome.R will not be visible in main.R only the hello() function. Multiple pieces of information can be exposed by returning a list() object in module.exports. Refer to the documentation for details. All the best, Rick Wargo https://linkedin.com/in/rickwargo/ https://www.rickwargo.com/ @rickwargo [[alternative HTML version deleted]] _______________________________________________ R-packages mailing list r-packa...@r-project.org https://stat.ethz.ch/mailman/listinfo/r-packages ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
