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@hadley hadley released this Feb 20, 2017 · 169 commits to master since this release

stringr 1.2.0

API changes

  • str_match_all() now returns NA if an optional group doesn't match
    (previously it returned ""). This is more consistent with str_match()
    and other match failures (#134).

New features

  • In str_replace(), replacement can now be a function that is called once
    for each match and who's return value is used to replace the match.
  • New str_which() mimics grep() (#129).
  • A new vignette (vignette("regular-expressions")) describes the
    details of the regular expressions supported by stringr.
    The main vignette (vignette("stringr")) has been updated to
    give a high-level overview of the package.

Minor improvements and bug fixes

  • str_order() and str_sort() gain explicit numeric argument for sorting
    mixed numbers and strings.
  • str_replace_all() now throws an error if replacement is not a character
    vector. If replacement is NA_character_ it replaces the complete string
    with replaces with NA (#124).
  • All functions that take a locale (e.g. str_to_lower() and str_sort())
    default to "en" (English) to ensure that the default is consistent across
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