Compare string vectors.

Compare string vectors.

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string_isblank(s)
string_isupper(s)
string_islower(s)

Arguments

s	A string (character) vector.

Value

Boolean vector.

Details

The function string_isblank() tests whether a vector consists of only blank characters. Synonyms are s_isblank(), isblank(), and is.blank().

The %like% operator tests whether a pattern match is found in a string.

The functions string_isupper() and string_islower() test whether each element in a string vector is all uppercase or lowercase, respectively. Synonyms are s_fun(), isfun(), and is.fun() (replace "fun" with "upper" or "lower").

See also

https://github.com/robertschnitman/stringops

Examples

string_isblank("         ")
#> [1] TRUE
string_isblank("    string     ")
#> [1] FALSE

rownames(mtcars) %like% "^M"
#>  [1]  TRUE  TRUE FALSE FALSE FALSE FALSE FALSE  TRUE  TRUE  TRUE  TRUE  TRUE
#> [13]  TRUE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
#> [25] FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE

string_isupper(c('TEST', 'test', 'tEsT'))
#> [1]  TRUE FALSE FALSE
string_islower(c('TEST', 'test', 'tEsT'))
#> [1] FALSE  TRUE FALSE