getName: get the name of an input in nested function calls

In brry/berryFunctions: Function Collection Related to Plotting and Hydrology

get the name of an input in nested function calls

Description

get the name of an input in nested function calls

Usage

getName(x)

Arguments

x	input object name or character string

Value

Character string with the name

Author(s)

https://stackoverflow.com/users/2725969/brodieg Implementation Berry Boessenkool, [e-mail], Sep 2016

See Also

https://stackoverflow.com/a/26558733, substitute

Examples

# This does not work well:

lower <- function(x) deparse(substitute(x))
upper <- function(y) lower(y)
lower(pi) # returns "pi", as expected
upper(pi) # returns "y".

# That's why there is getName:

getName(pi) # returns "pi", as expected
upper <- function(y) getName(y)
upper(pi) # yay!

upper("dummy")
upper(dummy) # works also for nonexistent objects
dummy <- 7
upper("dummy") # still stable
upper(dummy) # still stable

upper(stackloss[1:5,])

upper2 <- function(data) upper(data)
upper2("K")
upper2(K)

# getName only works correctly if x is not an evaluated object:
lower2 <- function(inp, assign=FALSE) {if(assign) inp <- inp; getName(inp)}
lower2(pi)       # "pi"
lower2(pi, TRUE) # "3.14159265358979"

brry/berryFunctions documentation built on Feb. 21, 2024, 2:20 p.m.