Conditionals with Omitted Operands The middle operand in a conditional expression may be omitted. Thenif the first operand is nonzero, its value is the value of the conditionalexpression. Therefore, the expression x ? : y has the value of x if that i…

/// <summary> /// 中缀表达式到逆波兰表达式的转换及求值 /// </summary> public class RpnExpression { #region 定义属性 int Top = -1; #endregion /// <summary> /// 检查中缀表达式是否合法 /// </summary> /// <param name="exp"></param> /// <return…

模型: <?php namespace Admin\Model; use Think\Model; /** * 汉字转拼音 * @author huangguojin */ class ZHModel extends Model{ //utf-8中国汉字集合 private $ChineseCharacters; //编码 private $charset = 'utf-8'; public function __construct(){ if( empty($this->ChineseCha…

1. Modulus operator (%) The modulus operator works on integers and yields the remainder when the first operand is divided by the second. In Python, the modulus operator is a percent sign (%). The syntax is the same as for the other operators: The mod…

let view = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 568)) addSubview(view) view.autoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight 会报以下错误: Binary operator '|' cannot be applied to two UIViewAutoresizin…

http://learnxinyminutes.com/docs/c++/ C++ is a systems programming language that, according to its inventor Bjarne Stroustrup, was designed to be a “better C” support data abstraction support object-oriented programming support generic programming Th…

vim有许多命令,网上搜有一堆贴子.文章列举出各种功能的命令. 对于"="."d"."y",我在无意中发现了它们所具有的相同的一些用法,先举以下三个例子: =nG dnG ynG 其中,n为行号.注意行号后面接的是大写字母"G".而"nG"恰好是光标移动到第n行的命令. 对于"=","=nG"的意思就是从当前行到第n行之间进行格式化.常用的一个命令"gg=G…

本文主要介绍Android立体旋转动画,或者3D旋转,下图是我自己实现的一个界面 立体旋转分为以下三种: 1. 以X轴为轴心旋转 2. 以Y轴为轴心旋转 3. 以Z轴为轴心旋转--这种等价于android默认自带的旋转动画RotateAnimation 实现立体旋转核心步骤: 1. 继承系统Animation重写applyTransformation方法 通过applyTransformation方法的回调参数 float interpolatedTime, Transformation t 来…

$x^2+y^2=c^2$ 每一个实数都能用有理数去逼近到任意精确的程度,这就是有理数的稠密性.The rational points are dense on the number axis. 每一个实数都能用有理数去逼近到任意精确的程度,这就是有理数的稠密性.The rational points are dense on the number axis.            …

原文地址:http://blog.csdn.net/x_i_a_o_h_a_i/article/details/40449847 其实网上的3D旋转的例子很多,在这里我只是想把其代码做一个解释. 先上图: 代码: TurnAroundActivity /** * 图片浏览器的主Activity. * * @author guolin */ public class TurnAroundActivity extends Activity { /** * 根布局 */ private Relativ…