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R语言中,简单的S3和S4类的定义
R语言中,简单的S3和S4类的定义#S3classnewstudent<-function(sid,sname,ssex){tmp<-list(id=sid,name=sname,sex=ssex)class(tmp)<-"student"return(tmp)}print.student<-function(st){cat(st$id,"\n")cat(st$name,"\n")cat(st$sex,"\n")}st=newstudent(11,"jack",..
分类:编程语言   时间:2016-09-23 15:10:29    阅读次数:197
Lesson 14 A noble gangster
There was a time when the owners of shops and businesses in Chicago had to pay large sums of money to gansters in return for 'protection'. If the mone ...
分类:其他好文   时间:2016-09-23 14:34:44    阅读次数:150
js 时间
function preDate(num){ if(isNaN(num)){ alert("参数必须为数字"); return; } var now = new Date(), year = now.getFullYear(), month = now.getMonth()+ 1, day = no ...
分类:Web程序   时间:2016-09-23 14:33:28    阅读次数:186
Javascript中括号的最佳用法
对a的log结果是undefined,因为解释器会在return后面自动补上";"号,因此函数b的写法是最佳实践. ...
分类:编程语言   时间:2016-09-23 13:01:44    阅读次数:122
41. First Missing Positive
Given an unsorted integer array, find the first missing positive integer. For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2. Your algorithm s ...
分类:其他好文   时间:2016-09-23 13:01:33    阅读次数:132
[LeetCode #1] Two Sum
1. Two Sum Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input wo ...
分类:其他好文   时间:2016-09-23 12:58:51    阅读次数:135
Easyui控制combotree只能选择叶子节点
$(function() { $('#tt').combotree({ url: 'getTree.do', onBeforeSelect: function(node) { if (!$(this).tree('isLeaf', node.target)) { return false; } }, ...
分类:其他好文   时间:2016-09-23 11:11:35    阅读次数:179
Leetcode34--->Search for a Range(在排序数组中找出给定值出现的范围)
题目:给定一个排序数组,找出给定的target值出现的范围;算法复杂度要求在O(logn);如果没有找到,则返回[-1, -1]; 举例: For example,Given [5, 7, 7, 8, 8, 10] and target value 8,return [3, 4]. 解题思路: 一看 ...
分类:编程语言   时间:2016-09-23 11:05:15    阅读次数:157
美图工作记录-2-opencv学习
判断是否正确读入的方法: if( argc != 2 || !(src=imread(argv[1], 1)).data ) return -1; if( src.empty() ) { return -1; } 分割通道: split(src, bgr_planes); 颜色通道转换: cvtCo ...
分类:其他好文   时间:2016-09-23 11:01:43    阅读次数:116
54. Spiral Matrix
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example,Given the following matrix: You s ...
分类:其他好文   时间:2016-09-23 08:41:40    阅读次数:99
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