taskCallbackNames

R Base 3.6.2

This provides a way to get the names (or identifiers) for the currently registered task callbacks that are invoked at the conclusion of each top-level task. These identifiers can be used to remove a callback.

Syntax

getTaskCallbackNames()

Return Value

A character vector giving the name for each of the registered callbacks which are invoked when a top-level task is completed successfully. Each name is the one used when registering the callbacks and returned as the in the call to addTaskCallback.

Examples

Example

# NOT RUN {
 n <- addTaskCallback(function(expr, value, ok, visible) {
                        cat("In handler\n")
                        return(TRUE)
                      }, name = "simpleHandler")

 getTaskCallbackNames()

   # now remove it by name
 removeTaskCallback("simpleHandler")


 h <- taskCallbackManager()
 h$add(function(expr, value, ok, visible) {
                        cat("In handler\n")
                        return(TRUE)
                      }, name = "simpleHandler")
 getTaskCallbackNames()
 removeTaskCallback("R-taskCallbackManager")
# }

taskCallbackNames

Syntax

Return Value

Examples

See Also