package options

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

See generic: setMetaValue

## S4 method for signature 'character,ANY,character'
setMetaValue(id, value,
  where = tryCatch(devtools::as.package(".")$package, error = function(cond) {
      stop("Invalid default value for `where`") }), sub_id = character(),
  fail_value = NULL, force = FALSE, gap = TRUE, must_exist = FALSE,
  reactive = FALSE, return_status = TRUE, strict = c(0, 1, 2),
  typed = FALSE, ...)

`id`	`character`.
`value`	`ANY`.
`where`	`character`.
`sub_id`	`character`. Optional ID for a sub layer. Useful for a hub-like option container structure.
`fail_value`	`ANY`. Value that is returned if assignment failed and `return_status = FALSE`.
`force`	`logical`. `TRUE`: when `dirname(id)` points to a leaf instead of a branch (i.e. `dirname(id)` is not an `environment`), overwrite it to turn it into a branch and vice versa when `id` points to a branch that is to be transformed into a leaf; `FALSE`: either return with `fail_value` or signal condition depending on value of `strict`.
`gap`	`logical`. `TRUE`: when `dirname(id)` points to a non-existing parent branch or if there are any missing branches in the nested structure, then auto-create all missing branches; `FALSE`: either return with `fail_value` or throw a condition in such cases (depending on `strict`);
`must_exist`	`logical`. `TRUE`: `id` pointing to a non-existing meta object either results in return value `fail_value` or signal a condition depending on `strict`; `FALSE`: meta object that `id` points to is set.
`reactive`	`logical`. `TRUE`: set reactive meta object via `setShinyReactive`. `FALSE`: set regular/non-reactive meta object value. Note that if `value` inherits from `ReactiveExpression` (which it does if `reactiveExpression` or wrappers around this function are used), `reactive` is automatically set to `TRUE`.
`return_status`	`logical`. `TRUE`: return status (`TRUE` for successful assignment, `FALSE` for failed assignment); `FALSE`: return actual assignment value (`value`) or `fail_value`.
`strict`	`logical`. Controls what happens when `id` points to a non-existing meta object: 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
`typed`	`logical`. `TRUE`: create an implicitly typed meta object; `FALSE`: create a regular meta object.

logical. TRUE.

Janko Thyson janko.thyson@gmail.com

http://github.com/Rappster/optionr

setMetaValue

## Not run: 

##------------------------------------------------------------------------------
## Default location of option container //
##------------------------------------------------------------------------------

## NOTE
## Obmitting `where` (and `id` in `initializeOptionContainer()`) in the all 
## calls will assign the overall option container to the package/project 
## name (if `hidden = TRUE` it is additionally prepended by a `.`)

initializeOptionContainer(overwrite = TRUE)
setMetaValue(id = "x_1", value = 10)
getMetaValue(id = "x_1")

##------------------------------------------------------------------------------
## Explicit location of option container //
##------------------------------------------------------------------------------

initializeOptionContainer(id = "test", overwrite = TRUE)
setMetaValue(id = "x_1", value = 10, where = "test")
getMetaValue(id = "x_1", where = "test")

##------------------------------------------------------------------------------
## Sub ID //
##------------------------------------------------------------------------------

initializeOptionContainer(sub_id = "a", overwrite = TRUE)
setMetaValue(id = "x_1", value = 10, sub_id = "a")
getMetaValue(id = "x_1", sub_id = "a")


## End(Not run)