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",..
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编程语言 时间:
2016-09-23 15:10:29
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197
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 ...
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其他好文 时间:
2016-09-23 14:34:44
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150
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 ...
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Web程序 时间:
2016-09-23 14:33:28
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186
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. ...
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编程语言 时间:
2016-09-23 13:01:44
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122
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 ...
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其他好文 时间:
2016-09-23 13:01:33
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132
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 ...
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其他好文 时间:
2016-09-23 12:58:51
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135
$(function() { $('#tt').combotree({ url: 'getTree.do', onBeforeSelect: function(node) { if (!$(this).tree('isLeaf', node.target)) { return false; } }, ...
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其他好文 时间:
2016-09-23 11:11:35
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179
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 ...
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编程语言 时间:
2016-09-23 11:05:15
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157
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 ...
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其他好文 时间:
2016-09-23 11:01:43
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116
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 ...
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其他好文 时间:
2016-09-23 08:41:40
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99