如何在Ruby中唯一化數組？

Question

我知道「.uniq」方法，但它在這裏不起作用。我將Mechanize鏈接實例推送到一個數組中並應用它，但它不會刪除重複項。這裏是陣列..

#<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">, 

但仍在使用後。「.uniq」結果是一樣的。這裏是我使用Ruby代碼..

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

Answer 1

Array#uniq使用對象的hash和eql?方法。確保這些對象的定義正確，否則使用uniq_by與您的標準。