http://blogs.msdn.com/b/borisj/archive/2006/09/28/769708.aspx I apologize for the long delay for this section (although I suppose my average posting frequency is already pretty low), but I was on a much needed vacation. I finished the last chapter wi…

Description International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows: "a" maps to ".-", "b" maps to "-...", "c" maps to "-.-.",…

一.问题的提出 我们先来看看下面几段代码,要注意的是,以下代码不要在浏览器的开发者工具(如FireBug.Chrome Developer tool)中运行,原因后面会说明: 为什么我们可以删除对象的属性: var o = { x: 1 }; delete o.x; // true o.x; // undefined 但不以删除像这样声明的变量: var x = 1; delete x; // false x; // 1 也不能删除像这样定义的函数: function x(){} delete…

/* * Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.lang; /** * Class {@code Object} is the root…

hashcode方法返回该对象的哈希码值. hashCode()方法可以用来来提高Map里面的搜索效率的,Map会根据不同的hashCode()来放在不同的位置,Map在搜索一个对象的时候先通过hashCode()找到相应的位置,然后再根据equals()方法判断这个位置上的对象与当前要插入的对象是不是同一个.若两个对象equals相等,但不在一个区间,根本没有机会进行比较,会被认为是不同的对象. 所以,Java对于eqauls方法和hashCode方法是这样规定的: 1.如果两个对象相同,那么…

/* * Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.lang; /** * Class {@code Object} is the root…

Functions Functions allow to structure programs in segments of code to perform individual tasks. In C++, a function is a group of statements that is given a name, and which can be called from some point of the program. The most common syntax to defin…

http://julialang.org/ julia | source | downloads | docs | blog | community | teaching | publications | gsoc | juliacon | rss Julia is a high-level, high-performance dynamic programming language for technical computing, with syntax that is familiar to…

Contents Tutorial Hello, World Command-Line Arguments Finding Duplicate Lines A Web Server Loose Ends Program Structure Names Declarations Variables Assignments Type Declarations Packages and Files Scope Basic Data Types Integers Floating-Point Numbe…

zk用处如此之多,以至于每个地方都要你理解zk原理! 请按如下操作姿势打开: 1. 打开zk的git仓库地址:https://github.com/apache/zookeeper , 确认过眼神,它就是你要找有人! 2. 下载源码到本地,下载 ant 工具到本地,(如果还没下载的话: http://ant.apache.org/)! 3. 运行 ant 脚本,使生成需要的环境: ant eclepse !(可能会花费几分钟的时间) 4. idea 打开源码,导入必要包! 5. 运行源码main…