Method: Array#any?

Defined in:
array.c

#any? ⇒ Boolean #any?(object) ⇒ Boolean #any? {|element| ... } ⇒ Boolean

Returns whether for any element of self, a given criterion is satisfied.

With no block and no argument, returns whether any element of self is truthy:

[nil, false, []].any? # => true  # Array object is truthy.
[nil, false, {}].any? # => true  # Hash object is truthy.
[nil, false, ''].any? # => true  # String object is truthy.
[nil, false].any?     # => false # Nil and false are not truthy.

With argument object given, returns whether object === ele for any element ele in self:

[nil, false, 0].any?(0)          # => true
[nil, false, 1].any?(0)          # => false
[nil, false, 'food'].any?(/foo/) # => true
[nil, false, 'food'].any?(/bar/) # => false

With a block given, calls the block with each element in self; returns whether the block returns any truthy value:

[0, 1, 2].any? {|ele| ele < 1 } # => true
[0, 1, 2].any? {|ele| ele < 0 } # => false

With both a block and argument object given, ignores the block and uses object as above.

Special case: returns false if self is empty (regardless of any given argument or block).

Related: see Methods for Querying.

Overloads:

  • #any? ⇒ Boolean

    Returns:

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

    Returns:

    • (Boolean)
  • #any? {|element| ... } ⇒ Boolean

    Yields:

    • (element)

    Returns:

    • (Boolean) 


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# File 'array.c', line 7783

static VALUE
rb_ary_any_p(int argc, VALUE *argv, VALUE ary)
{
    long i, len = RARRAY_LEN(ary);

    rb_check_arity(argc, 0, 1);
    if (!len) return Qfalse;
    if (argc) {
        if (rb_block_given_p()) {
            rb_warn("given block not used");
        }
        for (i = 0; i < RARRAY_LEN(ary); ++i) {
            if (RTEST(rb_funcall(argv[0], idEqq, 1, RARRAY_AREF(ary, i)))) return Qtrue;
        }
    }
    else if (!rb_block_given_p()) {
        for (i = 0; i < len; ++i) {
            if (RTEST(RARRAY_AREF(ary, i))) return Qtrue;
        }
    }
    else {
        for (i = 0; i < RARRAY_LEN(ary); ++i) {
            if (RTEST(rb_yield(RARRAY_AREF(ary, i)))) return Qtrue;
        }
    }
    return Qfalse;
}