A new release of the stringi package is available on CRAN (please wait a few days for Windows and OS X binary builds).

# install.packages("stringi") or update.packages()
library("stringi")

Here’s a list of changes in version 0.4-1. In the current release, we particularly focussed on making the package’s interface more consistent with that of the well-known stringr package. For a general overview of stringi’s facilities and base R string processing issues, see e.g. here.

# uses ICU's locale-dependent word break iterator
stri_extract_all_words("stringi: THE string processing package for R")
## [[1]]
## [1] "stringi"    "THE"        "string"     "processing" "package"   
## [6] "for"        "R"
stri_detect_regex(c("stringi", "STRINGI"), "stringi", case_insensitive=TRUE)
## [1] TRUE TRUE

instead of:

stri_detect_regex(c("stringi", "STRINGI"), "stringi", opts_regex=stri_opts_regex(case_insensitive=TRUE))
## [1] TRUE TRUE
stri_extract_all_fixed("abaBAaba", "ABA", case_insensitive=TRUE, overlap=TRUE)
## [[1]]
## [1] "aba" "aBA" "aba"
cat(stri_wrap(stri_rand_lipsum(1), 40, 2.0), sep="\n")
## Lorem ipsum dolor sit amet, et et diam
## vitae est ut. At tristique, tincidunt
## taciti, ac egestas vestibulum magna.
## Volutpat nisl non sed ultricies nisl
## nibh magna. Nullam rhoncus ut phasellus
## sed. Congue enim libero congue massa
## eget. Ligula, quis est amet velit.
## Accumsan amet nunc ad. Porttitor,
## sed vestibulum diam vestibulum quis
## sed gravida ultrices. Per urna enim.
## Scelerisque interdum sed vestibulum
## rhoncus quis imperdiet pharetra. Sapien
## iaculis, lacinia ac cras ante, sed
## vitae inceptos dis tristique dignissim.
## Venenatis volutpat lectus sodales,
## hac feugiat molestie mollis. A, urna
## pellentesque ante himenaeos ante at
## potenti in.
stri_subset_fixed(c("abc", NA, "def"), "a")
## [1] "abc" NA
stri_subset_fixed(c("abc", NA, "def"), "a", omit_na=TRUE)
## [1] "abc"
stri_split_regex(c("bab", "babab"), "a", n = 3, simplify=TRUE)
##      [,1] [,2] [,3]
## [1,] "b"  "b"  ""  
## [2,] "b"  "b"  "b"
for (test in c(TRUE, FALSE))
   print(stri_paste("a", if (test) 1:9, ignore_null=TRUE))
## [1] "a1" "a2" "a3" "a4" "a5" "a6" "a7" "a8" "a9"
## [1] "a"

Enjoy! Any comments and suggestions are welcome.