powered by
is.withinRange(val, min, max)
has.punct
has_punct
is.oneOf
is.onlyLowers
is.properName
is_one_of
is_only_lowers
is_proper_name
is_within_range
is_within_range(1, 0, 2) == TRUE is_within_range(-1, 0, 2) == FALSE
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