Question

如何仅打印json中的文本。我正在使用rails app上的ruby。

    tweets = JSON.parse(response.body)
    tweets.each do |tweet|
          "#{tweet["text"]}"
    end

我尝试了上面的代码，它显示了整个json。

Response.body：

[{＆＃34; created_at＆＃34; =＆gt;＆＃34; Mon Jun 09 02:49:17 +0000 2014＆＃34;，＆＃34; id＆＃34; =＆gt; 475831972812423168，＆＃34; id_str＆＃34; =＆gt;＆＃34; 475831972812423168＆＃34;，＆＃34; text＆＃34; =＆gt;＆＃34; @debalec＃DIST1＆＃34;，＆＃34; source＆＃34; =＆gt;＆＃34; https://dev.twitter.com/docs/ TFW \＆＃34; rel = \＆＃34; nofollow \＆＃34;＆gt; Twitter for 网站＆＃34;，＆＃34;截断＆＃34; =＆gt; false，＆＃34; in_reply_to_status_id＆＃34; =＆gt; nil，＆＃34; in_reply_to_status_id_str＆＃34; =＆gt; nil，＆＃34; in_reply_to_user_id＆＃34; =＆gt; 2551123651，＆＃34; in_reply_to_user_id_str＆＃34; = GT;＆＃34; 2551123651＆＃34 ;, ＆＃34; in_reply_to_screen_name＆＃34; =＆gt;＆＃34; debalec＆＃34;，＆＃34; user＆＃34; =＆gt; {＆＃34; id＆＃34; =＆gt; 1551421092，＆＃34; id_str＆＃34; =＆gt;＆＃34; 1551421092＆＃34;，＆＃34; name＆＃34; =＆gt;＆＃34; The Third＆＃34;，＆＃34; screen_name＆＃34; =＆gt;＆＃34;第三个＆＃34;，＆＃34;位置＆＃34; =＆gt;＆＃34;＆＃34;，＆＃34;说明＆＃34; =＆gt; ;＆＃34;＆＃34 ;, ＆＃34; url＆＃34; =＆gt; nil，＆＃34; entity＆＃34; =＆gt; {＆＃34; description＆＃34; =＆gt; {＆＃34; urls＆＃34; =＆gt; [] }}，＆＃34; protected＆＃34; =＆gt; false，＆＃34; followers_count＆＃34; =＆gt; 12，＆＃34; friends_count＆＃34; =＆gt; 199，＆＃34; listed_count＆＃34; =＆gt; 0，＆＃34; created_at＆＃34; =＆gt;＆＃34; Thu Jun 27 20:24:56 +0000 2013＆＃34;，＆＃34; favourites_count＆＃34; =＆gt; 54，＆＃34; utc_offset＆＃34; =＆gt; nil，＆＃34; time_zone＆＃34; =＆gt; nil，＆＃34; geo_enabled＆＃34; =＆gt; false，＆＃34;已验证＆＃34; =＆gt; false，＆＃34; statuses_count＆＃34; =＆gt; 82，＆＃34; lang＆＃34; =＆gt;＆＃34; zh＆＃34;，＆＃34; contributors_enabled＆＃34; =＆gt; false，＆＃34; is_translator＆＃34; =＆gt; false，＆＃34; is_translation_enabled＆＃34; =＆gt; false，＆＃34; profile_background_color＆＃34; =＆gt;＆＃34; 59BEE4＆＃34;，＆＃34; profile_background_image_url＆＃34; = GT;＆＃34; http://pbs.twimg.com/profile_background_images/378800000083038715/7b1cad0896d22d75b85f5f86fc69b59f.jpeg＆＃34 ;, ＆＃34; profile_background_image_url_https＆＃34; = GT;＆＃34; https://pbs.twimg.com/profile_background_images/378800000083038715/7b1cad0896d22d75b85f5f86fc69b59f.jpeg＆＃34 ;, ＆＃34; profile_background_tile＆＃34; = GT;假，＆＃34; profile_image_url＆＃34; = GT;＆＃34; http://abs.twimg.com/sticky/default_profile_images/default_profile_4_normal.png＆＃34 ;, ＆＃34; profile_image_url_https＆＃34; = GT;＆＃34; https://abs.twimg.com/sticky/default_profile_images/default_profile_4_normal.png＆＃34 ;, ＆＃34; profile_link_color＆＃34; = GT;＆＃34; 8FCAE0＆＃34 ;, ＆＃34; profile_sidebar_border_color＆＃34; = GT;＆＃34; 4BB7DF＆＃34 ;, ＆＃34; profile_sidebar_fill_color＆＃34; = GT;＆＃34; 191F22＆＃34 ;, ＆＃34; profile_text_color＆＃34; =＆gt;＆＃34; 4BB7DF＆＃34;，＆＃34; profile_use_background_image＆＃34; =＆gt; true，＆＃34; default_profile＆＃34; =＆gt; false，＆＃34; default_profile_image＆＃34; =＆gt; true，＆＃34;关注＆＃34; =＆gt; false，＆＃34; follow_request_sent＆＃34; =＆gt; false，＆＃34;通知＆＃34; =＆gt; false}，＆＃34; geo＆＃34; =＆gt; nil，＆＃34;坐标＆＃34; =＆gt; nil，＆＃34;地点＆＃34; =＆gt; ;零，＆＃34;贡献者＆＃34; =＆gt; nil，＆＃34; retweet_count＆＃34; =＆gt; 0，＆＃34; favorite_count＆＃34; =＆gt; 0，＆＃34;实体＆＃34; =＆gt; {＆＃34; hashtags＆＃34; =＆gt; [{＆＃34; text＆＃34; =＆gt;＆＃34; DIST1＆＃34;，＆＃34; indices＆＃34; =＆gt; [10,16]}]，＆＃34;符号＆＃34; =＆gt; []，＆＃34; urls＆＃34; =＆gt; []，＆＃34; user_mentions＆＃34; =＆gt; [{＆＃34; screen_name＆＃34; =＆gt;＆＃34; debalec＆＃34;，＆＃34; name＆＃34; =＆gt;＆＃34; DebaElec＆＃ 34 ;, ＆＃34; id＆＃34; =＆gt; 2551123651，＆＃34; id_str＆＃34; =＆gt;＆＃34; 2551123651＆＃34;，＆＃34; indices＆＃34; =＆gt; [0,8]} ]}，＆＃34; favited＆＃34; =＆gt; false，＆＃34;转发＆＃34; =＆gt; false，＆＃34; lang＆＃34; =＆gt;＆＃34; und＆＃34;}， {＆＃34; created_at＆＃34; =＆gt;＆＃34; Fri Jun 06 22:41:39 +0000 2014＆＃34;，＆＃34; id＆＃34; =＆gt; 475044876841938944，＆＃34; id_str＆＃34; =＆gt;＆＃34; 475044876841938944＆＃34;，＆＃34; text＆＃34; =＆gt;＆＃34; hi @ debalec＆＃34;，＆＃34; source＆＃34; =＆gt;＆＃34; http：//twitter.com/download/android \＆＃34; rel = \＆＃34; nofollow \＆＃34;＆gt; Twitter for Android＆＃34;，＆＃34;截断＆＃34; =＆gt; false，＆＃34; in_reply_to_status_id＆＃34; =＆gt; nil，＆＃34; in_reply_to_status_id_str＆＃34; =＆gt; nil，＆＃34; in_reply_to_user_id＆＃34; =＆gt; nil，＆＃34; in_reply_to_user_id_str＆＃34; =＆gt; nil，＆＃34; in_reply_to_screen_name＆＃34; =＆gt; nil，＆＃34; user＆＃34; =＆gt; {＆＃34; id＆＃34; =＆gt; 1551421092，＆＃34; id_str＆＃34; =＆gt;＆＃34; 1551421092＆＃34;，＆＃34; name＆＃34; =＆gt;＆＃34;第三个＆＃34;，＆＃34; screen_name＆＃34; =＆gt;＆＃34;第三个＆＃34;，＆＃34;位置＆＃34; =＆gt;＆＃34;＆＃34;，＆＃34;说明＆＃34; = ＆GT;＆＃34;＆＃34 ;, ＆＃34; url＆＃34; =＆gt; nil，＆＃34; entity＆＃34; =＆gt; {＆＃34; description＆＃34; =＆gt; {＆＃34; urls＆＃34; =＆gt; [] }}，＆＃34; protected＆＃34; =＆gt; false，＆＃34; followers_count＆＃34; =＆gt; 12，＆＃34; friends_count＆＃34; =＆gt; 199，＆＃34; listed_count＆＃34; =＆gt; 0，＆＃34; created_at＆＃34; =＆gt;＆＃34; Thu Jun 27 20:24:56 +0000 2013＆＃34;，＆＃34; favourites_count＆＃34; =＆gt; 54，＆＃34; utc_offset＆＃34; =＆gt; nil，＆＃34; time_zone＆＃34; =＆gt; nil，＆＃34; geo_enabled＆＃34; =＆gt; false，＆＃34;已验证＆＃34; =＆gt; false，＆＃34; statuses_count＆＃34; =＆gt; 82，＆＃34; lang＆＃34; =＆gt;＆＃34; zh＆＃34;，＆＃34; contributors_enabled＆＃34; =＆gt; false，＆＃34; is_translator＆＃34; =＆gt; false，＆＃34; is_translation_enabled＆＃34; =＆gt; false，＆＃34; profile_background_color＆＃34; =＆gt;＆＃34; 59BEE4＆＃34;，＆＃34; profile_background_image_url＆＃34; =＆GT;＆＃34; http://pbs.twimg.com/profile_background_images/378800000083038715/7b1cad0896d22d75b85f5f86fc69b59f.jpeg＆＃34;＆＃34; profile_background_image_url_https＆＃34; =＆GT;＆＃34; https://pbs.twimg.com/profile_background_images/378800000083038715/7b1cad0896d22d75b85f5f86fc69b59f.jpeg＆＃34 ;, ＆＃34; profile_background_tile＆＃34; =＆GT;假＆＃34; profile_image_url＆＃34; =＆GT;＆＃34; http://abs.twimg.com/sticky/default_profile_images/default_profile_4_normal.png＆＃34;＆＃34; profile_image_url_https＆＃34; =＆GT;＆＃34; https://abs.twimg.com/sticky/default_profile_images/default_profile_4_normal.png＆＃34 ;, ＆＃34; profile_link_color＆＃34; = GT;＆＃34; 8FCAE0＆＃34 ;, ＆＃34; profile_sidebar_border_color＆＃34; = GT;＆＃34; 4BB7DF＆＃34 ;, ＆＃34; profile_sidebar_fill_color＆＃34; = GT;＆＃34; 191F22＆＃34 ;, ＆＃34; profile_text_color＆＃34; =＆gt;＆＃34; 4BB7DF＆＃34;，＆＃34; profile_use_background_image＆＃34; =＆gt; true，＆＃34; default_profile＆＃34; =＆gt; false，＆＃34; default_profile_image＆＃34; =＆gt; true，＆＃34;关注＆＃34; =＆gt; false，＆＃34; follow_request_sent＆＃34; =＆gt; false，＆＃34;通知＆＃34; =＆gt; false}，＆＃34; geo＆＃34; =＆gt; nil，＆＃34;坐标＆＃34; =＆gt; nil，＆＃34;地点＆＃34; =＆gt; ;零，＆＃34;贡献者＆＃34; =＆gt; nil，＆＃34; retweet_count＆＃34; =＆gt; 0，＆＃34; favorite_count＆＃34; =＆gt; 0，＆＃34;实体＆＃34; =＆gt; {＆＃34; hashtags＆＃34; =＆gt; []，＆＃34;符号＆＃34; =＆gt; []，＆＃34; urls＆＃34; =＆gt; ; []，＆＃34; user_mentions＆＃34; =＆gt; [{＆＃34; screen_name＆＃34; =＆gt;＆＃34; debalec＆＃34;，＆＃34; name＆＃34; =＆gt;＆＃34; DebaElec＆＃ 34 ;, ＆＃34; id＆＃34; =＆gt; 2551123651，＆＃34; id_str＆＃34; =＆gt;＆＃34; 2551123651＆＃34;，＆＃34; indices＆＃34; =＆gt; [3,11]} ]}，＆＃34; favited＆＃34; =＆gt; false，＆＃34;转发＆＃34; =＆gt; false，＆＃34; lang＆＃34; =＆gt;＆＃34; und＆＃34;}]

Answer 1

这里的一个问题是您在引号内使用引号。忘了逃跑？

另一个问题是你没有打印任何东西。仅仅在循环中返回文本什么都不做，并且在循环完成时总是会返回tweets对象。

所以，你走了：

tweets = JSON.parse(response.body)

tweets.each do |tweet|
    puts tweet["text"]
end

<强>更新

好吧，我猜这里引号内的引号只要你使用字符串插值就不会有问题。但它仍然不是首选方式。我宁愿选择"#{tweet['text']}"。

Answer 2

使用map代替each：

tweets = JSON.parse(response.body)
tweets.map do |tweet|
  tweet["text"]
end

并且无需插入tweet["text"]。

从红宝石中的json打印特定对象

2 个答案: