search

trinker / qdapRegex

qdapRegex is a collection of regular expression tools associated with the qdap package that may be useful outside of the context of discourse analysis.
50 stars 4 forks source link

Allow the `left` or `right` arguments to be null in `rm_between` and `ex_between`? #27

Closed aedobbyn closed 2 years ago

aedobbyn commented 6 years ago

This is a great package! Forgive me since I'm new to it and there may be a good reason why you check that both left and right markers are supplied.

For my particular use case, it's useful to extract everything up to a certain word or everything after it. Is there a reason not to set both left and right arguments to NULL and allow the users to give one or both?

Cheers!

trinker commented 6 years ago

I wonder if replace_to & replace_from in the textclean package (dev version on github) suit your needs? https://github.com/trinker/textclean/blob/master/R/replace_to.R

aedobbyn commented 6 years ago

It does! Funny enough I just ran into the same use case in a different project and regex puzzled it out. This would have been much simpler! textclean has so many of the little utility functions always find myself making -- great to have it in one spot.

Just a heads up, the install initially failed with 

Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : 
  namespace ‘lexicon’ 0.7.4 is being loaded, but >= 1.0.0 is required

until I installed lexicon from CRAN. If it's useful to you:

devtools::session_info()
#> Session info -------------------------------------------------------------
#>  setting  value                       
#>  version  R version 3.4.4 (2018-03-15)
#>  system   x86_64, darwin15.6.0        
#>  ui       X11                         
#>  language (EN)                        
#>  collate  en_US.UTF-8                 
#>  tz       America/Chicago             
#>  date     2018-05-31
#> Packages -----------------------------------------------------------------
#>  package   * version date       source        
#>  backports   1.1.2   2017-12-13 CRAN (R 3.4.3)
#>  base      * 3.4.4   2018-03-15 local         
#>  compiler    3.4.4   2018-03-15 local         
#>  datasets  * 3.4.4   2018-03-15 local         
#>  devtools    1.13.5  2018-02-18 CRAN (R 3.4.3)
#>  digest      0.6.15  2018-01-28 CRAN (R 3.4.3)
#>  evaluate    0.10.1  2017-06-24 CRAN (R 3.4.1)
#>  graphics  * 3.4.4   2018-03-15 local         
#>  grDevices * 3.4.4   2018-03-15 local         
#>  htmltools   0.3.6   2017-04-28 CRAN (R 3.4.0)
#>  knitr       1.20    2018-02-20 CRAN (R 3.4.3)
#>  magrittr    1.5     2014-11-22 CRAN (R 3.4.0)
#>  memoise     1.1.0   2017-04-21 CRAN (R 3.4.0)
#>  methods   * 3.4.4   2018-03-15 local         
#>  Rcpp        0.12.16 2018-03-13 CRAN (R 3.4.4)
#>  rmarkdown   1.9     2018-03-01 CRAN (R 3.4.3)
#>  rprojroot   1.3-2   2018-01-03 CRAN (R 3.4.3)
#>  stats     * 3.4.4   2018-03-15 local         
#>  stringi     1.1.7   2018-03-12 CRAN (R 3.4.4)
#>  stringr     1.3.0   2018-02-19 CRAN (R 3.4.3)
#>  tools       3.4.4   2018-03-15 local         
#>  utils     * 3.4.4   2018-03-15 local         
#>  withr       2.1.2   2018-03-15 CRAN (R 3.4.4)
#>  yaml        2.1.18  2018-03-08 CRAN (R 3.4.4)