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占位测试测试

栏数较多的表格

objective-c

objectivec正常

-(void)animationFrame
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:5];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];// 动画相对速度，开始和结束的时候慢，中间快
    view.center = CGPointMake(0,0);
    [UIView commitAnimations];
}

objective-c不正常

```objective-c

-(void)animationAlpha
{
[UIView beginAnimations:nil context:NULL];// 需要设置代理时
[UIView setAnimationDuration:1];// 动画的持续时间
[UIview setAnimationDelay:1];// 动画延迟时间
view2.apleha = 0.0;
[UIView commitAnimations];// 标记着动画块的结束
}

不加关键字自动判断正常

https://gist.github.com/8322802

http://jsfiddle.net/7g5JP/

今天的 markdown 里的 code 似乎不会换行了？

def say_yes!
    puts "Yes!"
end

最近在写光线跟踪程序，想实现一个n-Rook采样器。原理是是先在一个单位正方形的对角线上放置n个点，然后随机的将这n个点的x坐标打乱，从而保证：

1. n个点均匀的分布在单位正方形上
2. 如果将正方形分成n*n个小正方形，那么每个大正方形的每行每列都只有一个元素。

现在，我用C++将上面的思想实现出来，得出的结果是这样的
完美洗牌算法是参照Matrix87大神的文章实现的http://www.matrix67.com/blog/archives/879

主要的代码有:

NRook::NRook(int num) :Sampler(num)
{
    for (int i = 0; i < num; i++)
    {
        sampleList[i].x = 1.f*(i) / numSample;
        sampleList[i].y = 1.f*(i) / numSample;
    }
}

void NRook::shuffle()
{
    for (int i = 0; i < numSample; i++)
    {
        int targetX = randomGen.getRandomI(i, numSample);
        std::swap(sampleList[i].x, sampleList[targetX].x);
    }
}

struct RandomGen{
    virtual float getRandomF(){
        return static_cast <float>(rand()) / static_cast <float>(RAND_MAX);
    }
    virtual float getRandomF(float a, float b) { return (b - a)*getRandomF() + a; }
    virtual int getRandomI(){ return rand(); };
    virtual int getRandomI(int a, int b){ return a + getRandomI() % (b - a); }
};

请问这是选择算法的问题还是实现的问题

如果用3反撇号（backtick）做的代码，似乎换行有问题：

<?php
phpinfo();

用4空格缩进做的代码似乎就没事

<?php
phpinfo();

作为3反撇号的惯用者表示(╯°口°)╯(┴—┴！！！

小塔楼