case: A powerful replacement for base::switch

In alekrutkowski/clojR: Clojure-inspired functions (macros) in R

Description

See https://clojuredocs.org/clojure.core/case.

Usage

case(obj, ...)

Arguments

obj	An object/value.
...	An odd number of expressions. A set of test/expression pairs plus an expression to be evalauted if all tests fail. Equivalent of nested if (identical(obj, a)) b else c calls.

Examples

case(x,
     list(1,2), "abc",
     c('a','b'), 123,
     NULL, "oh no!",
     "something else")
# Is transformed to:
# if (identical(x, list(1, 2))) "abc" else
#     if (identical(x, c("a","b"))) 123 else
#         if (identical(x, NULL)) "oh no!" else
#             "something else"

alekrutkowski/clojR documentation built on May 11, 2019, 11:24 p.m.