existsNested-character-missing-method: Exists Nested (char-miss)

Description Usage Arguments Value Author(s) References See Also Examples

Description

See generic: existsNested

Usage

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## S4 method for signature 'character,missing'
existsNested(id, where = parent.frame(),
  strict = c(0, 1, 2), ...)

Arguments

id

character.

where

missing.

strict

logical. Controls what happens when id points to a non-existing component:

  • 0: ignore and return FALSE to signal that the assignment process was not successful or fail_value depending on the value of return_status

  • 1: ignore and with warning and return FALSE

  • 2: ignore and with error

...

Further arguments to be passed to subsequent functions/methods.

Value

See method existsNested-char-char-method

Author(s)

Janko Thyson [email protected]

References

http://github.com/Rappster/nestr

See Also

existsNested

Examples

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## Not run: 

##------------------------------------------------------------------------------
## Basics //
##------------------------------------------------------------------------------

setNested(id = "test", value = TRUE)
existsNested(id = "test")

setNested(id = "a/b/c", value = 10)
existsNested(id = "a")
existsNested(id = "a/b")
existsNested(id = "a/b/c")
existsNested(id = "a/b/c/d")

existsNested(id = "c")
existsNested(id = "c/d/e")
  
##------------------------------------------------------------------------------
## Strictness levels //
##------------------------------------------------------------------------------

## Empty ID //
existsNested(id = character())
try(existsNested(id = character(), strict = 1))
try(existsNested(id = character(), strict = 2))

## Not-existing //  
existsNested(id = "c/d/e")
try(existsNested(id = "c/d/e", strict = 1))
try(existsNested(id = "c/d/e", strict = 2))

##------------------------------------------------------------------------------
## Explicit `where` //
##------------------------------------------------------------------------------

where <- new.env()
setNested(id = "a/b/c", value = 10, where = where)
existsNested(id = "a/b/c", where = where)
existsNested(id = "a/b/c/d", where = where)
existsNested(id = "c/d/e", where = where)


## End(Not run)

rappster/nestr documentation built on May 24, 2017, 7:33 p.m.