我储存了大量的“推特”数据,并希望及时检索大约500k记录,用于数据处理。 我有一份“Tweet mongo”文件,其中载有基本的tw数据,并试图检索如下:
weekly_tweets =witterTweet.all(:created_at.gt => 1.week.ago, fields => [:created_at, :text, : From_user]
简言之,这占用了一定的时间和记忆——这是提高这种速度和效率的任何办法。 我已经想用地图来减少,但我所想做的是,文本处理和在信条上reg。
不要说所有东西,因为这样做的结果是,在蒙戈,在你注意到使用记忆和时间时,你会打上500克的标语。 取而代之的是使用。 获得治疗的治疗者越多越好。
Recently I discovered two amazing regular expression features: ?: and ?!. I was curious of other neat regex features. So maybe you would like to share some tricky regular expressions.
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