Method: Hash#any?

Defined in:
hash.c

#any? ⇒ Boolean #any?(object) ⇒ Boolean #any? {|key, value| ... } ⇒ Boolean

Returns true if any element satisfies a given criterion; false otherwise.

If self has no element, returns false and argument or block are not used.

With no argument and no block, returns true if self is non-empty; false if empty.

With argument object and no block, returns true if for any key key h.assoc(key) == object:

h = {foo: 0, bar: 1, baz: 2}
h.any?([:bar, 1]) # => true
h.any?([:bar, 0]) # => false
h.any?([:baz, 1]) # => false

With no argument and a block, calls the block with each key-value pair; returns true if the block returns any truthy value, false otherwise:

h = {foo: 0, bar: 1, baz: 2}
h.any? {|key, value| value < 3 } # => true
h.any? {|key, value| value > 3 } # => false

Related: Enumerable#any?

Overloads:

  • #any? ⇒ Boolean

    Returns:

    • (Boolean)
  • #any?(object) ⇒ Boolean

    Returns:

    • (Boolean)
  • #any? {|key, value| ... } ⇒ Boolean

    Yields:

    Returns:

    • (Boolean) 


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# File 'hash.c', line 4545

static VALUE
rb_hash_any_p(int argc, VALUE *argv, VALUE hash)
{
    VALUE args[2];
    args[0] = Qfalse;

    rb_check_arity(argc, 0, 1);
    if (RHASH_EMPTY_P(hash)) return Qfalse;
    if (argc) {
        if (rb_block_given_p()) {
            rb_warn("given block not used");
        }
        args[1] = argv[0];

        rb_hash_foreach(hash, any_p_i_pattern, (VALUE)args);
    }
    else {
        if (!rb_block_given_p()) {
            /* yields pairs, never false */
            return Qtrue;
        }
        if (rb_block_pair_yield_optimizable())
            rb_hash_foreach(hash, any_p_i_fast, (VALUE)args);
        else
            rb_hash_foreach(hash, any_p_i, (VALUE)args);
    }
    return args[0];
}