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城市 golf course 高尔夫球场 tennis court 网球场 football pitch 绿茵场 skating rink 旱冰场 radio station 广播电台 concert hall 音乐厅 museum 博物馆 This is not take-away, in oth 阅读全文
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The new stuff can be divided into a few different categories: security, performance, ease-of-use, and even some entirely new functionality. Redis 6 br 阅读全文
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Levels of Abstraction flink 提供了不同层次的API来进行 流处理 或者批处理 最低层次的抽象 提供了有状态的流 通过 Process Function 嵌入到 DataStream API 当中去,它允许用户自由的处理events,并且使用state,另外用户可以注册ev 阅读全文
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1. What Is a Circular Dependency(循环依赖)? It happens when a bean A depends on another bean B, and the bean B depends on the bean A as well: Bean A → Bea 阅读全文
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1) Every node has a color either red or black. 2) Root of tree is always black. 3) There are no two adjacent red nodes (A red node cannot have a red p 阅读全文
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专业术语:equation /ɪˈkweɪʒn/ 方程式eigenvalues /'ɛgən,væljuz/ 特征值determinant /dɪˈtɜːmɪnənt/ 行列式product 乘积equation of the first degree / first order equation 阅读全文
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Bellman–Ford Algorithm 是由 Richard Bellman(DP创始人) 和 Ford 共同创立的,求解单源最短路径问题的一种算法。它的原理是对图进行顶点个数减一次的松弛操作(逐渐逼近最终解的过程),得到所有顶点到源点的最短路径。该算法优于dijkstra的方面在于其边的权值 阅读全文
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Semaphore 与操作系统概念中的 信号量和PV操作 类似 控制最大的并发线程数 *countdownLatch也可以实现类似功能 Example // java program to demonstrate // use of semaphores Locks import java.util 阅读全文
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The Guava project contains several of Google's core libraries that we rely on in our Java-based projects: collections, caching, primitives support, co 阅读全文