finding: Find first item that matches certain conditions

In tjmahr/adventofcode20: Advent of Code 2020

Description

The argument names here are meant to follow purrr::detect.

Usage

find_value2(.x, .y, .p, ..., .dir = c("forward", "backward"), .default = NULL)

find_value(.x, .p, ..., .dir = c("forward", "backward"), .default = NULL)

find_position(.x, .p, ..., .dir = c("forward", "backward"), .default = NULL)

Arguments

.x, .y	Vectors to iterate over. For 2-argument version, .x, .y must have the same length.
.p	A predicate function for determining matches.
...	Additional arguments to set for the predicate
.dir	Direction to traverse the items. One of "forward" (default) or "backward".
.default	Value used when no match is found.

Value

either the .default value or the values of the first match.

Examples

find_value2(1:10, -4:5, function(x, y) x + y > 10)
find_value2(1:10, -4:5, function(x, y) x + y > 11)
find_value2(1:10, -4:5, function(x, y) x + y > 100)

tjmahr/adventofcode20 documentation built on Dec. 31, 2020, 8:39 a.m.