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DStreams 转换算子 与RDD类似，转换允许修改来自输入DStream的数据。 DStreams支持普通Spark RDD上可用的许多转换。一些常见的如下。 Transformation Meaning map ( func ) Return a new DStream by passing each element of the source DStream through a function func . flatMap ( func ) Similar to map, but each input item can be mapped to 0 or more output items. filter ( func ) Return a new DStream by selecting only the records of the source DStream on which func returns true. repartition ( numPartitions ) Changes the level of parallelism in this DStream by creating more or fewer partitions. union ( otherStream ) Return a new DStream that contains the

Aspects of the invention relate to improvements to the Least Recently Used (LRU) cache replacement method. Weighted LRU (WLRU) and Compact Weighted LRU (CWLRU) are CPU cache replacement methods that have superior hit rates to LRU replacement for programs with poor locality, such as network protocols and applications. WLRU assigns weights to cache lines and makes replacement decision by comparing weights. When a cache line is first brought into the cache, it is assigned an initial weight. Weights of cache lines in WLRU increase when hit and decrease when not hit. Weights in WLRU also have upper

METHOD 1: Consider the case where we do not know the number of elements in each row at compile time, i.e. both the number of rows and number of columns must be determined at run time. One way of doing this would be to create an array of pointers to type int and then allocate space for each row and point these pointers at each row. Consider: 1 #include <stdio.h> 2 3 int main() 4 { 5 int nrows=5;　　 6 int ncols=10; 7 int row; 8 int **rowptr; 9 rowptr=malloc(nrows*sizeof(int *)); //分配5行(int *)型一维数组大小的空间 10 if (NULL==rowptr) 11 { 12 puts("\nFailure to allocate room for row pointers.\n"); 13 exit(0)

http://codeforces.com/contest/1257/problem/D D. Yet Another Monster Killing Problem time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output You play a computer game. In this game, you lead a party of 𝑚 heroes, and you have to clear a dungeon with 𝑛 monsters. Each monster is characterized by its power 𝑎𝑖. Each hero is characterized by his power 𝑝𝑖 and endurance 𝑠𝑖. The heroes clear the dungeon day by day. In the beginning of each day, you choose a hero (exactly one) who is going to enter the dungeon this day. When the hero enters the dungeon, he

/** * @version: v2.5.0 * @buildTime: Thu Jul 16 2015 17:36:29 GMT+0800 (中国标准时间) */ ( function ( global , document , S , undefined ) { var location = global . location , ua = navigator . userAgent , documentElement = document . documentElement , head = document . head || document . getElementsByTagName ( "head" ) [ 0 ] , isSupportConsole = global . console && console . log , noop = function ( ) { } , error = function ( msg ) { throw isError ( msg ) ? msg : new Error ( msg ) ; } , /** * 配置对象 * @type {Object} */ Config = { debug : location . search . indexOf ( "debug" ) !== - 1 ? true : false } ,

A long-distance telephone company charges its customers by the following rules: Making a long-distance call costs a certain amount per minute, depending on the time of day when the call is made. When a customer starts connecting a long-distance call, the time will be recorded, and so will be the time when the customer hangs up the phone. Every calendar month, a bill is sent to the customer for each minute called (at a rate determined by the time of day). Your job is to prepare the bills for each month, given a set of phone call records. Input Specification: Each input file contains one test