cf_set: Set a configuration item

In r-lib/conf: Persistent Package Configuration

Description

First we check common part in the key and the data.

Usage

cf_set(self, private, key, value)

Arguments

self	Self.
private	Private self.
key	Key to set.
value	Value to set.

Details

“' data key common rest car(rest) cdr(rest) ops —– — —— —- ——— ——— ——————– a:b:0 a:b a,b [[c(int, c)]] <- value a:b:0 a:b:c a,b c c [[c(int, c)]] <- value a:b:0 a:b:c:d a,b c,d c d [[c(int, c)]] <- d:value a:0 a a [[c(int, c)]] <- value a:0 x x x [[c(int, c)]] <- value a a a [[c(int, a)]] <- value “'

Assuming that the tail of the data is a list, all we need to do is

“' data[[c(common, head(rest, 1))]] <- deep_list(tail(rest, -1), value) “'

where 'deep_list' creates a deeply nested list. If 'rest' is empty, then we are replacing an existing element in the data list. Otherwise we add a new element to the list at the specified level.

r-lib/conf documentation built on May 14, 2019, 2:31 p.m.