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README.Rmd
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README.Rmd
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---
output: github_document
---
<!-- README.md is generated from README.Rmd. Please edit that file -->
```{r, include = FALSE}
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>",
fig.path = "man/figures/README-",
out.width = "100%"
)
```
# RVerbalExpressions <img src="man/figures/logo.png" align="right" height=150/>
<!-- badges: start -->
[](https://ci.appveyor.com/project/tyluRp/rverbalexpressions-4tt0n)
[](https://CRAN.R-project.org/package=RVerbalExpressions)
[](https://cran.r-project.org/package=RVerbalExpressions)
<!-- badges: end -->
The goal of `RVerbalExpressions` is to make it easier to construct regular expressions using grammar and functionality inspired by [VerbalExpressions](https://github.com/VerbalExpressions). Usage of `%>%` is encouraged to build expressions in a chain like fashion.
## Installation
Install the released version of `RVerbalExpressions` from [CRAN](https://cran.r-project.org/package=RVerbalExpressions):
```r
install.packages("RVerbalExpressions")
```
Or install the development version from GitHub with:
``` r
# install.packages("devtools")
devtools::install_github("VerbalExpressions/RVerbalExpressions")
```
## Example
This is a basic example which shows you how to build a regular expression:
```{r example, message=FALSE}
library(RVerbalExpressions)
# construct an expression
x <- rx_start_of_line() %>%
rx_find('http') %>%
rx_maybe('s') %>%
rx_find('://') %>%
rx_maybe('www.') %>%
rx_anything_but(' ') %>%
rx_end_of_line()
# print the expression
x
# test for a match
grepl(x, "https://www.google.com")
```
## Other Implementations
You can see an up to date list of all ports on [VerbalExpressions.github.io](https://VerbalExpressions.github.io).
- [JavaScript](https://github.com/VerbalExpressions/JSVerbalExpressions)
- [Ruby](https://github.com/ryan-endacott/verbal_expressions)
- [C#](https://github.com/VerbalExpressions/CSharpVerbalExpressions)
- [Python](https://github.com/VerbalExpressions/PythonVerbalExpressions)
- [Java](https://github.com/VerbalExpressions/JavaVerbalExpressions)
- [Groovy](https://github.com/VerbalExpressions/GroovyVerbalExpressions)
- [PHP](https://github.com/VerbalExpressions/PHPVerbalExpressions)
- [Haskell](https://github.com/VerbalExpressions/HaskellVerbalExpressions)
- [Haxe](https://github.com/VerbalExpressions/HaxeVerbalExpressions)
- [C++](https://github.com/VerbalExpressions/CppVerbalExpressions)
- [Objective-C](https://github.com/VerbalExpressions/ObjectiveCVerbalExpressions)
- [Perl](https://github.com/VerbalExpressions/PerlVerbalExpressions)
- [Swift](https://github.com/VerbalExpressions/SwiftVerbalExpressions)
Additionally, there are two R packages that try to solve the same problem. I encourage you to check these out:
1. [rex](https://github.com/r-lib/rex) by [\@kevinushey](https://twitter.com/kevin_ushey)
2. [rebus](https://github.com/richierocks/rebus) by [\@richierocks](https://twitter.com/richierocks?lang=en)
## Contributing
If you find any issues, typos, etc., please file an issue or submit a PR. All contributions are welcome!