method

any?

v1_8_6_287 - Show latest stable - 1 note - Class: Enumerable

any?() public

Passes each element of the collection to the given block. The method returns true if the block ever returns a value other than false or nil. If the block is not given, Ruby adds an implicit block of {|obj| obj} (that is any? will return true if at least one of the collection members is not false or nil.

   %w{ ant bear cat}.any? {|word| word.length >= 3}   #=> true
   %w{ ant bear cat}.any? {|word| word.length >= 4}   #=> true
   [ nil, true, 99 ].any?                             #=> true

Show source

/*
 *  call-seq:
 *     enum.any? [{|obj| block } ]   => true or false
 *  
 *  Passes each element of the collection to the given block. The method
 *  returns <code>true</code> if the block ever returns a value other
 *  than <code>false</code> or <code>nil</code>. If the block is not
 *  given, Ruby adds an implicit block of <code>{|obj| obj}</code> (that
 *  is <code>any?</code> will return <code>true</code> if at least one
 *  of the collection members is not <code>false</code> or
 *  <code>nil</code>.
 *     
 *     %w{ ant bear cat}.any? {|word| word.length >= 3}   #=> true
 *     %w{ ant bear cat}.any? {|word| word.length >= 4}   #=> true
 *     [ nil, true, 99 ].any?                             #=> true
 *     
 */

static VALUE
enum_any(obj)
    VALUE obj;
{
    VALUE result = Qfalse;

    rb_iterate(rb_each, obj, rb_block_given_p() ? any_iter_i : any_i, (VALUE)&result);
    return result;
}

August 15, 2008

3 thanks

Using any? on Empty Arrays and Hashes

When applied to an empty array or hash, with or without a block, any? always returns false. That’s because with an empty collection, there are no values to process and return a true value.

any?

Related methods

Using any? on Empty Arrays and Hashes