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#' searchable
#'
#' Tools For Custom Searches / Subsets / Slices of Named R Objects
#'
#' The 'searchable' package provides flexibile methods for subseting named
#' object by matching the names using case (in)sensitivity, regular or
#' fixed expressions. searches uses the standard '['
#' operator and allows specification of default search behavior to either the
#' search target (named object) and/or the search pattern.
#'
#' It was designed to make flexible, high performance dictionary and
#' thesaurus structures.
#'
#' @references
#' \url{http://stackoverflow.com/questions/5671719/case-insensitive-search-of-a-list-in-r} \cr
#' \url{http://stackoverflow.com/questions/27085620/which-command-in-r-with-case-insensitive} \cr
#' \url{http://stackoverflow.com/questions/21450925/r-grep-usage-finding-the-averages} \cr
#'
#' @seealso
#' \code{\link{searchable}} \cr
#' \url{http://cran.r-project.org/web/packages/qdap}
#'
#' @examples
#'
#' # ATOMIC VECTORS:
#' v <- c( a=1, b=2, B=3, c=4, c2=5 )
#' sv <- searchable(v)
#'
#'
#' # FLEXIBLY FIND ELEMENTS BY NAME
#' sv[ regex('c') ]
#' sv[ fixed('c') ]
#'
#' sv[ ignore.case('b') ]
#'
#'
#' # FLEXIBLY REPLACEMENT ELEMENTS BY NAME
#' sv[ regex('c.?') ] <- "3rd"
#' sv
#'
#'
#' # SET DEFAULT SEARCH FOR TARGET/OBJECT
#' sv <- searchable(v, case_insensitive = TRUE )
#' sv['b']
#' sv['B']
#'
#' sv <- regex(sv)
#' sv['c']
#'
#' sv <- ignore.case(sv)
#' sv['b']
#' sv['c'] # st
#'
#'
#' # USE ON (RECURSIVE) LISTS:
#' l <- list( a=1, b=2, c=3 )
#' sl <- searchable(l)
#' sl["b"]
#' sl[ ignore.case("B") ]
#'
#'
#' # USE WITH MAGRITTR
#' \dontrun{
#' sl[ "B" %>% ignore.case ]
#' "b" %>% sl[.]
#' "B" %>% ignore.case %>% sl[.]
#' }
#'
#'
#'
#' @docType package
#' @name searchable-package
#' @import magrittr methods stringi
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