is.substring: Check if string x is a substring of y
In duncankmckinnon/OKdplyr: Zero Kelvin dplyr

Description Usage Arguments Value Examples

check if a character string x is contained within another character string y. If the 'start' condition is set, only check if y starts with x (i.e. for partial match evaluations). The %substr% operator works equivalently, returning true if the lhs is a substring of the rhs.

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is.substring(x, y, start = FALSE)

lhs %substr% rhs

`x`	character - a single character string
`y`	character - a single character string that may contain x
`start`	logical - if TRUE only check the first subsequence of y for x

logical - whether x is a substring of y

is.substring('abc', 'abcdef', start = TRUE) # TRUE
is.substring(' abc', 'abcdef', start = TRUE) # FALSE
is.substring('xyz', 'abcdef') # FALSE
is.substring('xyz','uvwxyz') # TRUE
'abc' %substr% '_abcdef_' # TRUE