MatrixXd表示任意size的矩阵，元素类型为double;VectorXd表示任意size的向量，元素类型为double.//创建31的向量v，并赋值为1,2,3VectorXdv(3);v<<1,2,3;使用固定尺寸的Matrix,Vector相比于可变尺寸的Matrix,Vector，例如Matri

1\.表达式求值中缀转后缀include<iostreaminclude<stackusingnamespacestd;intPriority(charoper){switch(oper){case'(':return

!/usr/bin/envpythoncoding:utf8UTF8转换成GBK编码tempdecodeencode原理就是把UTF8转换成万国码，再给万国码进行编码转换成GBK，在python2.x里面这么用"""给变量temp

转自 https://segmentfault.com/a/1190000006079389?fromgroupmessage&isappinstalled0说到协程(Coroutine)

题目链接：https://leetcodecn.com/contest/weeklycontest162/problems/reconstructa2rowbinarymatrix/(https://www.oschina.net/action/GoToLink?urlhttps%3A%2F%2Fleetcodecn.com%2Fco

importReact,{Component}from'react'classJsonUtilsextendsReact.Component{/字符串转json/staticstringToJson(data){return

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/数据类型转换工具类@authorcyf/publicclassNumConvertUtil{/bytes转16进制字符串@parambArray

一、NumPy简介其官网是：http://www.numpy.org/(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fwww.numpy.org%2F)NumPy是Python语言的一个扩充程序库。支持高级大量的维度数组与矩阵运算，