A - Red and Black There is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black tile. ...
分类:
其他好文 时间:
2020-01-23 13:54:42
阅读次数:
86
ExpressionBuilder https://github.com/Drutol/MALClient/tree/mal-alternative-api/ExpressionBuilder Welcome to the ExpressionBuilder classes! The Express ...
分类:
其他好文 时间:
2020-01-22 18:34:25
阅读次数:
96
Unbeknownst to many, promises are state machines. They exist in either an idle, pending, resolved or rejected state. Because they can be modeled as st ...
分类:
其他好文 时间:
2020-01-21 18:32:33
阅读次数:
82
Unique Paths A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or r ...
分类:
其他好文 时间:
2020-01-21 18:21:24
阅读次数:
105
You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl ...
分类:
其他好文 时间:
2020-01-21 16:15:13
阅读次数:
70
SparkContext SparkContext 是在 spark 库中定义的一个类,作为 spark 库的入口点; 它表示连接到 spark,在进行 spark 操作之前必须先创建一个 SparkContext 的实例,并且只能创建一个; 利用 SparkContext 实例创建的对象都是 RD ...
分类:
其他好文 时间:
2020-01-18 12:44:55
阅读次数:
66
原题链接在这里:https://leetcode.com/problems/reaching-points/ 题目: A move consists of taking a point (x, y) and transforming it to either (x, x+y) or (x+y, y) ...
分类:
其他好文 时间:
2020-01-17 13:51:06
阅读次数:
117
1. 背景知识 IO写入的过程是这样的: 用户数据 – 进程IO缓冲区 – 内核缓冲区 – (磁盘缓冲区 磁盘) 通常我们认为一个写请求(注意我们讨论的粒度一定是一个request,在不同环节request可能会被拆分合并)落盘,则是在它从内核缓冲区(内存中的一块区域)刷到磁盘上(不关心磁盘缓冲区) ...
分类:
其他好文 时间:
2020-01-16 19:19:56
阅读次数:
115
Given a binary tree where all the right nodes are either leaf nodes with a sibling (a left node that shares the same parent node) or empty, flip it up ...
分类:
其他好文 时间:
2020-01-15 13:37:21
阅读次数:
80
Distinguishing between 32-bit and 64-bit A64 instructionsMost integer instructions in the A64 instruction set have two forms, which operate on either ...
分类:
其他好文 时间:
2020-01-13 20:02:44
阅读次数:
108