/* * call-seq: * enum.grep(pattern) => array * enum.grep(pattern) {| obj | block } => array * * Returns an array of every element in <i>enum</i> for which * <code>Pattern === element</code>. If the optional <em>block</em> is * supplied, each matching element is passed to it, and the block's * result is stored in the output array. * * (1..100).grep 38..44 #=> [38, 39, 40, 41, 42, 43, 44] * c = IO.constants * c.grep(/SEEK/) #=> ["SEEK_END", "SEEK_SET", "SEEK_CUR"] * res = c.grep(/SEEK/) {|v| IO.const_get(v) } * res #=> [2, 0, 1] * */ static VALUE enum_grep(obj, pat) VALUE obj, pat; { VALUE ary = rb_ary_new(); VALUE arg[2]; arg[0] = pat; arg[1] = ary; rb_iterate(rb_each, obj, rb_block_given_p() ? grep_iter_i : grep_i, (VALUE)arg); return ary; }