March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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220 | Capítulo 11: Strings com stringr
a1 == a2
#> [1] FALSE
Elas são idênticas, mas como são definidas de forma diferente, fixed() não en-
contra uma combinação. Em seu lugar você pode usar coll(), definida a seguir,
para respeitar as regras de comparação de caráter humano:
str_detect( a1, fixed( a2 ))
#> [1] FALSE
str_detec
t( a1, coll( a2 ))
#> [1] TRUE
• coll() compara strings usando regras de collation. Isso é útil para fazer com-
binação insensível à caixa. Note que coll() recebe um parâmetro locale, que
controla quais regras são usadas para comparar caracteres. Infelizmente, partes
diferentes do mundo usam regras diferentes!
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