/* * call-seq: * array.assoc(obj) -> an_array or nil * * Searches through an array whose elements are also arrays * comparing _obj_ with the first element of each contained array * using obj.==. * Returns the first contained array that matches (that * is, the first associated array), * or +nil+ if no match is found. * See also <code>Array#rassoc</code>. * * s1 = [ "colors", "red", "blue", "green" ] * s2 = [ "letters", "a", "b", "c" ] * s3 = "foo" * a = [ s1, s2, s3 ] * a.assoc("letters") #=> [ "letters", "a", "b", "c" ] * a.assoc("foo") #=> nil */ VALUE rb_ary_assoc(ary, key) VALUE ary, key; { 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 > 0 && rb_equal(RARRAY(v)->ptr[0], key)) return v; } return Qnil; }