单例概念
内存中有一个唯一的实例
提供唯一的全局访问入口 SingleInstance.sharedInstance
在Swift中用let定义常量,并且是线程安全的import UIKit
class SingleInstance{
static let sharedInstance = SingleInstance()
init() {
println("实例化"...
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编程语言 时间:
2015-03-03 20:44:10
阅读次数:
179
To store English words, one method is to use linked lists and store a word letter by letter. To save some space, we may let the words share the same s...
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其他好文 时间:
2015-03-03 20:38:41
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148
To store English words, one method is to use linked lists and store a word letter by letter. To save some space, we may let the words share the same sublist if they share the same suffix. For example,...
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其他好文 时间:
2015-03-03 18:41:39
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140
Vasya became interested in bioinformatics. He's going to write an article about similar cyclic DNA sequences, so he invented a new method for determining the similarity of cyclic sequences.
Let's assume that...
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其他好文 时间:
2015-03-02 21:02:32
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313
下面要开始java中相关集合框架的学习啦。 Are you ready?Let's go~~ 今天要讲解的Java中的Collection框架。 1) 首先查看jdk中Collection类的源码后会发现如下内容: ... * @see AbstractCollection * @sinc...
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编程语言 时间:
2015-03-02 18:46:19
阅读次数:
593
07.SpriteKit征程——创建第一个场景Sprite Kit 的内容被放置于窗口当中,即那些可视内容。Sprite Kit 之中的内容由SKView 类进行渲染(注:一般将普通的UIView转换成SKView是这么写的let skView = self.view as SKView )。由SKView 对象渲染的内容称之为场景,也就是Scene,它隶属于SKScene类.场景作为一个root...
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其他好文 时间:
2015-03-02 13:11:38
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181
func?getSSID()?->?String??{
????????let?interfaces:?CFArray!?=?CNCopySupportedInterfaces()?.takeRetainedValue()
????????if?interfaces?==?nil?{?return?nil?}
?...
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编程语言 时间:
2015-03-01 17:16:41
阅读次数:
660
Problem Description
Let A=∑ni=1ai?10n?i(1≤ai≤9)(n is the number of A’s digits). We call A as “beautiful number” if and only if a[i]≥a[i+1] when 1≤i/****************************************************...
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其他好文 时间:
2015-03-01 14:30:19
阅读次数:
91
beautiful number
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 136 Accepted Submission(s): 78
Problem Description
Let A=∑ni=1a...
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其他好文 时间:
2015-03-01 13:19:55
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167
Problem Description
Let's design a new chess game. There are N positions to hold M chesses in this game. Multiple chesses can be located in the same position. The positions are constituted as a topological graph, i.e. there are directed edges connecting so...
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其他好文 时间:
2015-03-01 13:14:04
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294