Truthyable
Truthyable — types that can be checked for boolean truthiness (Crystal semantics). Only false, None, and () (Void) are falsy; everything else is truthy. There is no NaN to consider: a float operation that would produce one raises instead, matching BEAM (see nonFiniteFloatError in src/interpreter/value.cxx).
trait Truthyable
Implemented by Bool, Integer, Float, String, Optional<X>, [X], Map<K, V>.
Required methods
An implementor writes these.
extends Bool
More methods of Bool, added by this module.
Implements Truthyable.
truthy? Truthyable
truthy? : Boolextends Integer
More methods of Integer, added by this module.
Implements Truthyable.
truthy? Truthyable
truthy? : Boolextends Float
More methods of Float, added by this module.
Implements Truthyable.
truthy? Truthyable
truthy? : Boolextends String
More methods of String, added by this module.
Implements Truthyable.
truthy? Truthyable
truthy? : Boolextends Optional<X>
More methods of Optional, added by this module.
Implements Truthyable.
truthy? Truthyable
truthy? : Boolextends [X]
More methods of List, added by this module.
Implements Truthyable.
truthy? Truthyable
truthy? : Boolextends Map<K, V>
More methods of Map, added by this module.
Implements Truthyable.
truthy? Truthyable
truthy? : Bool