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swift基础语法之——变量和常量
swift几乎可以用任何字符作为常量和变量的名字例如:let π = 3.14159let 网址 = "http://www.cnblogs.com/walter371"let {emoji表情} = "王大力和王二力"//emoji表情是一种特殊的Unicode字符//在mac上可以使用快捷键:c...
分类:编程语言   时间:2014-09-12 03:35:32    阅读次数:206
swift_重载和自定义运算符
像这样定义一个结构体 struct Vector2D {     var x = 0.0     var y = 0.0 } 当 Vector2D 的两个变量相加时,我们需要这样做: let v1 = Vector2D(x: 2.0, y: 3.0) let v2 = Vector2D(x: 4.0, y: 5.0) var v3 = Vector2D(x: v1.x + v2.x...
分类:编程语言   时间:2014-09-11 19:26:42    阅读次数:154
ios8 notification in swift
(1) let types: UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Badge let mySettings: UIUserNotificationSettings = UIUserNotificationSettings(forTypes: types, ca...
分类:移动开发   时间:2014-09-11 15:27:42    阅读次数:249
We are writing to let you know we have removed your selling privileges
Hello,Wearewritingtoletyouknowwehaveremovedyoursellingprivileges,canceledyourlistings,andplacedatemporaryholdonanyfundsinyourselleraccount.Anynewselli...
分类:其他好文   时间:2014-09-10 20:55:50    阅读次数:233
From Apprentice To Artisan 翻译 03
# The IoC Container 控制反转容器 ## Basic Binding 基础绑定 Now that we‘ve learned about dependency injection, let‘s explore inversion of control containers. IoC containers make managing your class ...
分类:移动开发   时间:2014-09-09 09:13:08    阅读次数:383
NASM Syntax
NASM has a simplified syntax designed to let the user code with minimum overhead. In its simplest form, a NASM program needs nothing more than the ass...
分类:其他好文   时间:2014-09-06 22:31:13    阅读次数:379
CF-46D-Parking Lot(线段树)
Nowadays it is becoming increasingly difficult to park a car in cities successfully. Let's imagine a segment of a street as long as L meters along which a parking lot is located. Drivers should park...
分类:其他好文   时间:2014-09-06 02:16:42    阅读次数:286
Swift数字类型之间的转换
Swift数字类型之间的转换Swift是一种安全的语言,对于类型的检查非常严格,不同类型之间不能随便转换。一、整型之间的转换在C和Objective-C等其他语言中,整型之间有两种转换方法:从小范围数到大范围数转换是自动的;从大范围数到小范围数需要强制类型转换,有可能造成数据精度的丢失。而在Swift中这两种方法是行不通的,我们需要通过一些函数进行显式地转换,代码如下:let historySco...
分类:编程语言   时间:2014-09-05 10:01:41    阅读次数:274
Swift Basic
推荐使用Xcode6 playground的功能来测试,可以很方便看到输出 不需要分号 println("Hello,?world!") 简单的赋值方式 使用 let 标记一个常量 ??var 标记一个变量 var?myVariable?=?42 myVariable?=?50 l...
分类:编程语言   时间:2014-09-04 15:12:59    阅读次数:202
Codeforces 235B. Let's Play Osu!
235B - Let's Play Osu! Let us take a deep look in how this score is calculated. for a n long 'O' block, they contribute n2 to answer. Let us reformat this problem a bit and consider the foll...
分类:其他好文   时间:2014-09-03 21:20:27    阅读次数:369
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