摘要： leetcode 1005 Sort the array first. The negation rules are quite simple： 1. execute negation for K times，so use a for loop 2. after negation, if the n 阅读全文

摘要： html调色板 虽然不是专业写前端的，但是每隔半年（或者更久？）都会有html配色的需求，这种不常用的东西不想放到书签里面，但是又懒得找半天，干脆扔这里吧 "coolors调色板" Javascript convert string array to integer array 今天遇到一个奇怪的问 阅读全文

摘要： I assume you already set up your hadoop 1.0.3 on your os x.open your ssh like thisFirst of all , you need to change your hadoop configuration,the masters and slaves have the same name localhostyour core-site.xml should be like this:<configuration> <property> <name>fs.default.name&l 阅读全文

摘要： these two days I spent some time reading the manual of GNU tar (not BSD version, through my mac's shell is BSD), and get some usefull insights about tar:1. tar is just a archiving tools , which means you can put many files together for the convinent of other operation. 8 operations are provided 阅读全文