failWith {sparrow} | R Documentation

## Utility function to try and fail with grace.

### Description

Inspired from one of Hadley's functions (in plyr or something?)

### Usage

    failWith(
      default = NULL,
      expr,
      frame = parent.frame(),
      message = geterrmessage(),
      silent = FALSE,
      file = stderr()
    )

### Arguments

`default` | the value to return if `expr` fails
`expr` | the expression to take a shot at
`frame` | the frame to evaluate the expression in
`message` | the error message to display if `expr` fails. Deafults to `base::geterrmessage()`
`silent` | if `TRUE`, sends the error message to `msg()`
`file` | where msg sends the message

### Value

the result of `expr` if successful, otherwise `default` value.

### Examples

    # look, this doesn't throw an error, it just returns NULL
    x <- failWith(NULL, stop("no error, just NULL"), silent = TRUE)

[Package sparrow version 1.0.3 Index]