is_existing

assert_all_are_existing

assert_any_are_existing

Does the variable exist? 
See <code><a rd-options="assertive.code" href="/link/is_existing?package=assertive&version=0.3-6&to=assertive.code" data-mini-rdoc="assertive.code::is_existing">is_existing</a></code>.

Lots of predicates (is_* functions) to check the state of your
variables, and assertions (assert_* functions) to throw errors if they
aren't in the right form.

Richard Cotton

assertive

Readable Check Functions to Ensure Code Integrity

is_existing function

Does the variable exist? 
See <code><a rd-options='assertive.code' href='is_existing'>is_existing</a></code>.

Does the variable exist?
 
See <code><a rd-options='assertive.code' href='is_existing'>is_existing</a></code>. — is_existing

Does the variable exist?
 
See <code><a rd-options='assertive.code' href='is_existing'>is_existing</a></code>.

Does the variable exist?
 
See <code><a rd-options="assertive.code" href="/link/is_existing?package=assertive&version=0.3-6&to=assertive.code" data-mini-rdoc="assertive.code::is_existing">is_existing</a></code>.

is_existing: Does the variable exist? See `is_existing`.

Description

Arguments