constraints.checkPattern: Pattern matching

In tableschema.r: Table Schema 'Frictionless Data'

Pattern matching

Description

Search for pattern matches (value) within a character vector (constraint). A regular expression is used to test field values. If the regular expression matches then the value is valid. The values of this field MUST conform to the standard XML Schema regular expression syntax.

Usage

constraints.checkPattern(constraint, value)

Arguments

constraint	character vector where matches are sought
value	character string to be matched

Value

TRUE if the pattern constraint is met

See Also

Constraints specifications

Examples

constraints.checkPattern(constraint = '^test$', value = 'test')

constraints.checkPattern(constraint = '^test$', value = 'TEST')

tableschema.r documentation built on Sept. 30, 2022, 1:06 a.m.