R: Check that a list contains only elements of a required type.

checkListElementClass {BBmisc} | R Documentation

## Check that a list contains only elements of a required type.

### Description

Check that argument is a list and contains only elements of a required type. Throws exception if check is not passed. Note that argument is evaluated when checked.

### Usage

    checkListElementClass(xs, cl)

### Arguments

`xs` | [`list`] Argument.
`cl` | [`character(1)`] Class that elements must have. Checked with `is`.

### Value

Nothing.

### Examples

    xs = as.list(1:3)
    checkListElementClass(xs, "numeric")

[Package BBmisc version 1.11 Index]