Method: Array#rassoc

Defined in:
array.c

#rassoc(object) ⇒ nil

Returns the first element ele in self such that ele is an array and ele[1] == object:

a = [{foo: 0}, [2, 4], [4, 5, 6], [4, 5]]
a.rassoc(4) # => [2, 4]
a.rassoc(5) # => [4, 5, 6]

Returns nil if no such element is found.

Related: Array#assoc; see also Methods for Fetching.

Returns:

  • (nil) 


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# File 'array.c', line 5183

VALUE
rb_ary_rassoc(VALUE ary, VALUE value)
{
    long i;
    VALUE v;

    for (i = 0; i < RARRAY_LEN(ary); ++i) {
        v = rb_check_array_type(RARRAY_AREF(ary, i));
        if (RB_TYPE_P(v, T_ARRAY) &&
            RARRAY_LEN(v) > 1 &&
            rb_equal(RARRAY_AREF(v, 1), value))
            return v;
    }
    return Qnil;
}