由于最近没什么时间好好写博文,我把用sass做雪碧图的关键点贴出来方便自己记忆: config.rb注释 # Set this to the root of your project when deployed: #配置服务器路径 http_path = "http//:www.baidu.com/" #配置css sass images javascripts路径 css_dir = "public/stylesheets" sass_dir = "pu
map将函数作用到数据集的每一个元素上,生成一个新的分布式的数据集(RDD)返回 map函数的源码: def map(self, f, preservesPartitioning=False): """ Return a new RDD by applying a function to each element of this RDD. >>> rdd = sc.parallelize(["b", "a", &quo
在这篇文章中,我将对Map的遍历方式做一个对比和总结,将分别从JAVA8之前和JAVA8做一个遍历方式的对比,亲测可行. public class LambdaMap { private Map<String, Object> map = new HashMap<>(); @Before public void initData() { map.put("key1", "value1"); map.put("key2",
Little Artem has invented a time machine! He could go anywhere in time, but all his thoughts of course are with computer science. He wants to apply this time machine to a well-known data structure: multiset. Artem wants to create a basic multiset of