ruby - 如何在 Ruby 中唯一化数组？

Question

我知道“.uniq”方法，但它在这里不起作用。我将 Mechanize 链接实例推送到一个数组中并应用了它，但它没有删除重复项。这是数组..

#<Mechanize::Page::Link "2" "/inquiry/inquiry-results.jsp?d-16544-p=2&middleName=&firstName=&lastName=JOHN">,
#<Mechanize::Page::Link "3" "/inquiry/inquiry-results.jsp?d-16544-p=3&middleName=&firstName=&lastName=JOHN">,
#<Mechanize::Page::Link "4" "/inquiry/inquiry-results.jsp?d-16544-p=4&middleName=&firstName=&lastName=JOHN">,
......................................................................................
#<Mechanize::Page::Link "2" "/inquiry/inquiry-results.jsp?d-16544-p=2&middleName=&firstName=&lastName=JOHN">,
#<Mechanize::Page::Link "3" "/inquiry/inquiry-results.jsp?d-16544-p=3&middleName=&firstName=&lastName=JOHN">,
#<Mechanize::Page::Link "4" "/inquiry/inquiry-results.jsp?d-16544-p=4&middleName=&firstName=&lastName=JOHN">,
#<Mechanize::Page::Link "5" "/inquiry/inquiry-results.jsp?d-16544-p=5&middleName=&firstName=&lastName=JOHN">,
#<Mechanize::Page::Link "6" "/inquiry/inquiry-results.jsp?d-16544-p=6&middleName=&firstName=&lastName=JOHN">,

但在使用“.uniq”后结果仍然相同。这是我正在使用的 ruby 代码..

page.links.each {|link| 
    page_links.push link if link.href =~ /inquiry-results/i and link.text =~ /[0-9]+/
}

Answer 1

Array#uniq 使用对象的 hash 和 eql? 方法。确保为您的对象正确定义了这些，或者将 uniq_by 与您的标准一起使用。