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最近在上coursera上的programming language的时候，Dan提到exception handling和dynamic scope很相似，但是只是简单的提了一下，并没有说哪里相似，接下来就比较一下这两者。
先看一个例子。
12345678val x = 1def f() = xd
...
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spark combineByKey
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combineByKey是spark的一个pair transformation。当你需要根据key来合并你的value，而你期望的合并后的value的返回类型和原本value的类型不同的时候你就会用到它（reduceByKey的返回类型则和原本的pair相同）。用groupByKey再对group
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anime top 20
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（三年前写的TOP20，补充几部这几年看过比较好的。高达00，圣母在上，京吹部，女子落语，touch，TT，月刊少女，邻座的怪同学，悠哉，飞跃巅峰1，还有幸运星不知道当时为什么没排进去）
个人向，不公正，不客观，排名不分先后
凉宫春日的忧郁京都的轻改巅峰，不少人的入宅作，1096的冒险，永无止境
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spring data jpa fetch mode
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虽然hibernate里好几种fetch mode.
SELECT
SELECT with BatchSize
JOIN
SUBSELCT
但是JPA里只有两种类型的fetching:EAGER和LAZY。在使用spring data jpa的时候，为了解决n+1查询问题，我们需要在查询中手动的
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shiro登录
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shiro默认的登录实现使用了用户名和密码进行验证。因为项目项目需要（使用了OAuth 2.0，不需要验证密码），改写了部分登录逻辑。在此记录一下主要用到的几个类。
AuthorizingRealm是验证登录以及获取权限的核心类。这个类是个抽象类，有两个待实现的方法。
123Authenticati
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宿題
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2016-05-07
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那边那个穿蓝T恤的帅帅的男孩子不是我的男朋友
あそこの青いTシャツを着ているハンセムな男の子は私の彼氏じゃないです。
你知道叶子老师最近胖了三公斤吗
最近葉子先生が３キロ太ったのを知ってる？
妈妈走进房间的时候，看见熊猫君正在做广播体操。
母が部屋に入った時，パンダ君が广播体操をしてい
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