Searches through the array whose elements are also arrays. Compares
key with the second element of each
contained array using ==. Returns the first contained array that matches. See also
Array#assoc.
/*
* call-seq:
* array.rassoc(key) -> an_array or nil
*
* Searches through the array whose elements are also arrays. Compares
* <em>key</em> with the second element of each contained array using
* <code>==</code>. Returns the first contained array that matches. See
* also <code>Array#assoc</code>.
*
* a = [ [ 1, "one"], [2, "two"], [3, "three"], ["ii", "two"] ]
* a.rassoc("two") #=> [2, "two"]
* a.rassoc("four") #=> nil
*/
VALUE
rb_ary_rassoc(ary, value)
VALUE ary, value;
{
long i;
VALUE v;
for (i = 0; i < RARRAY(ary)->len; ++i) {
v = RARRAY(ary)->ptr[i];
if (TYPE(v) == T_ARRAY &&
RARRAY(v)->len > 1 &&
rb_equal(RARRAY(v)->ptr[1], value))
return v;
}
return Qnil;
}