R Under development (unstable) (2023-11-07 r85491 ucrt) -- "Unsuffered Consequences"
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> ##
> ##  s t r f i n d . R  Test suite
> ##
> 
> 
> strfind <- pracma::strfind
> strfindi <- pracma::strfindi
> #findstr <- pracma::findstr
> 
> identical(strfind("", "aba"), NULL)
[1] TRUE
> identical(strfind("ab", "aba"), NULL)
[1] TRUE
> identical(strfind("aba", "aba"), 1)
[1] TRUE
> identical(strfind("ababa", "aba"), c(1, 3))
[1] TRUE
> identical(strfind("ababa", "aba", overlap=FALSE), 1)
[1] TRUE
> 
> identical(strfindi("ABA", "aba"), 1)
[1] TRUE
> identical(strfindi("aba", "ABA"), 1)
[1] TRUE
> identical(strfindi("ABABA", "aba"), c(1, 3))
[1] TRUE
> identical(strfindi("aBaBa", "AbA", overlap=FALSE), 1)
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.17    0.06    0.17