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Count And Say
ProblemImplement Count And Say function. For example, first, let user input a number, say 1. Then, the function will generate the next 10 numbers whic...
分类:其他好文   时间:2014-11-21 10:20:56    阅读次数:158
Is virtual function table really necessary for C++
OOP polymorphism In OOP languages, a base-class object pointer can do function call according to the actual type of the object.Let's see an example i....
分类:编程语言   时间:2014-11-20 11:47:07    阅读次数:231
[ES6] 05. The leg keyword -- 3. Block Scope
In ES6, IIFE is not necessary:// IIFE写法(function () { var tmp = ...; ...}());// 块级作用域写法{ let tmp = ...; ...}另外,ES6也规定,函数本身的作用域,在其所在的块级作用域之...
分类:其他好文   时间:2014-11-20 01:14:15    阅读次数:218
[ES6] 03. The let keyword -- 1
var message = "Hi";{ var message = "Bye"; }console.log(message); //ByeThe message inside the block still has impact on the outside.If you add ...
分类:其他好文   时间:2014-11-19 23:58:43    阅读次数:443
[ES6] 04. The let keyword -- 2 Fiald case
Fialdcase 1: let can work in it's block{ let a = 10; var b = 1;}a // ReferenceError: a is not defined.b //1Case 2: Let has no "Hosting" Problemf...
分类:其他好文   时间:2014-11-19 23:56:04    阅读次数:321
Swift 控制流
1.for in 循环for 被乘数 in 1...5{ println("\(被乘数)乘以5是\(被乘数*5)")}当不需要第一个变量的时候可以使用 _ 代替,比如 求3的10次方let 底=3let 幂=10var 结果=1for _ in 1...10{ 结果=结果*底}let 女神们=[.....
分类:编程语言   时间:2014-11-19 07:03:42    阅读次数:212
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.2.3
(1). Let $\sed{A_\al}$ be a family of mutually commuting operators. Then, there exists a common Schur basis for $\sed{A_\al}$. In other words, there e...
分类:其他好文   时间:2014-11-18 13:08:29    阅读次数:168
ACM学习历程—HDU1028 Ignatius and the Princess(组合数学)
Ignatius and the Princess Description "Well, it seems the first problem is too easy. I will let you know how foolish you are later." feng5166 says. "T...
分类:其他好文   时间:2014-11-16 20:04:47    阅读次数:204
Swift 字符串和字符
swift中的字符串和字符都兼容unicode定义一个字符串let hello="hello world"初始化一个空的字符串let hello=""let hello=String()判断一个字符串是否为空if hello.isEmpty{println("这是个空字符串")}字符串可以使用+进行...
分类:编程语言   时间:2014-11-16 13:15:20    阅读次数:241
6.6 类型推断
6.6 类型推断   我们曾经讨论过值的类型推断,知道在 C# 3.0 中用 var 关键字,在 F#中用 let 绑定。从本节开始,我们将讨论由 C# 和 F# 共有的另一个方面,当在 C# 中调用泛型方法时,如 Option.Some(清单 5.9)或 Option.Map(清单 6.13),可以显式指定类型参数值,像这样:   var dt = Option.Some(DateTim...
分类:其他好文   时间:2014-11-16 12:05:41    阅读次数:163
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