grapes-fn-grapes: Create Function

In matchr: Pattern Matching and Enumerated Types in R

Description

Syntactic sugar for creating a single-variable function. Can be conveniently used in Match statements.

Usage

lhs %fn% rhs

Arguments

lhs	symbol used to denote the function argument
rhs	expression that is converted to the function body. rhs may need to be surrounded by parentheses is other infix operators are used due to precedence rules.

Value

a function

Examples

Match(
  "abc",
  is.numeric  -> -1,
  i %fn% grepl("bc", i) -> 0,
  is.character -> 1
)

print_sq_log <- i %fn% print(sqrt(log(i)))
print_sq_log(10)

matchr documentation built on Sept. 9, 2021, 5:07 p.m.