sscanf 其实很强大 分类: 纯C技术 技术笔记 2010-03-05 16:00 12133人阅读 评论(4) 收藏 举报 正则表达式stringbuffercurlgoogle 最近在做日志分析,linux C 的开发环境,在对每行日志进行处理的时候,手下一个小伙用的是逐字节拆分成字段. 刚开始没注意,后来每天10几G的日志上来后,发现除了速度特别慢以外,还经常出问题,遇到错误格式的日志就直接崩溃... 拿过来帮他改的时候,觉得这里完全可以用sscanf来进行处理,于是google+ma…

Mahout 是一个很强大的数据挖掘工具,是一个分布式机器学习算法的集合,包括:被称为Taste的分布式协同过滤的实现.分类.聚类等.Mahout最大的优点就是基于hadoop实现,把很多以前运行于单机上的算法,转化为了MapReduce模式,这样大大提升了算法可处理的数据量和处理性能. 一.Mahout安装.配置 1.下载并解压Mahout http://archive.apache.org/dist/mahout/ tar -zxvf mahout-distribution-0.9.tar.…

Parliament Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 16521   Accepted: 6975 Description New convocation of The Fool Land's Parliament consists of N delegates. According to the present regulation delegates should be divided into dis…

To the Max Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 39058   Accepted: 20629 Description Given a two-dimensional array of positive and negative integers, a sub-rectangle is any contiguous sub-array of size 1*1 or greater located wi…

PIGS Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 18209 Accepted: 8277 Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. Customers come to th…

4 Values whose Sum is 0 Time Limit: 15000MS Memory Limit: 228000K Total Submissions: 17875 Accepted: 5255 Case Time Limit: 5000MS Description The SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how man…

Mayor's posters Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 40570   Accepted: 11798 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral post…

Arctic Network Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 9557   Accepted: 3187 Description The Department of National Defence (DND) wishes to connect several northern outposts by a wireless network. Two different communication tech…

Improving the GPA Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 606 Accepted Submission(s): 451 Problem Description Xueba: Using the 4-Point Scale, my GPA is 4.0. In fact, the AVERAGE SCORE of…

Sequence Time Limit: 6000MS Memory Limit: 65536K Total Submissions: 8277 Accepted: 2708 Description Given m sequences, each contains n non-negative integer. Now we may select one number from each sequence to form a sequence with m integers. It's clea…