R: Test if a hash has no key-value pairs.

is.empty {hash} | R Documentation

## Test if a hash has no key-value pairs.

### Description

`is.empty` tests to see if any key value pairs are assigned on a `hash` object.

### Usage

      is.empty(x)

### Arguments

`x` | hash object.

### Details

Returns `TRUE` if no key-value pairs are defined for the hash, `FALSE` otherwise.

### Value

logical.

### Author(s)

Christopher Brown.

### See Also

`exists`.

### Examples

        h <- hash( a=1, b=2, c=3 )
        is.empty(h)    # FALSE
        clear(h)
        is.empty(h)    # TRUE
        h <- hash()
        is.empty(h)    # TRUE

[Package hash version 2.2.6 Index]