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海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...数据就要去比较1000w次的simhash,计算量还是蛮大,普通PC 比较1000w次海明距离需要 300ms ,和5000w数据比较需要1.8 s。看起来相似度计算不是很慢,还在秒级别。给大家算一笔账就知道了:
随着业务增长需要一个小时处理100w次,...
一个转型程序员的销售观 - 杂谈 - 清泛网 - 专注C/C++及内核技术
一个转型程序员的销售观2013年中辞职创办Kollway App开发公司的时候,当我抱着从程序员转型产品经理的心态离职创业后,却发现我们急需要业务来养活自己。作为一支...
2013年中辞职创办Kollway App开发公司的时候,当我抱着从“...
What is Scala's yield?
I understand Ruby and Python's yield. What does Scala's yield do?
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no acceptable C compiler found in $PATH when installing python
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用Javascript获取页面元素的位置(全) - 更多技术 - 清泛网 - 专注C/C++及内核技术
用Javascript获取页面元素的位置(全)制作网页的过程中,你有时候需要知道某个元素在网页上的确切位置。下面的教程总结了Javascript在网页定位方面的相关知识。一、网页的大小和...制作网页的过程中,你有时候需要知道某个...
技术人员如何创业《二》- 合伙人的模式 - 资讯 - 清泛网 - 专注C/C++及内核技术
...聊聊个人经历。。
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How to do something to each file in a directory with a batch script
How do you iterate over each file in a directory with a .bat or .cmd file?
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Transport endpoint is not connected
FUSE is constantly (every 2 - 3 days) giving me this Transport endpoint is not connected error on my mount point and the only thing that seems to fix it is rebooting.
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Opposite of %in%: exclude rows with values specified in a vector
A categorical variable V1 in a data frame D1 can have values represented by the letters from A to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
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String concatenation: concat() vs “+” operator
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