Coding: Don't make mistakes when resizing objects! 编码：不要犯错误时 ， 缩放对象！ Preserve the initial ratio correctly! 保留的初步比例正确！

Posted on 17.发布17。 Jun, 2009 by Dragos in Coding 2008年6月，由德拉戈什 2009年的编码

I was tempted many times to do quick adjustments to my code, without taking into consideration some basic mathematical principles.我很想做多次快速调整自己的代码，没有考虑到一些基本的数学原理。 For examples if a box is first of all 100px tall and 60px wide, and then I notice that this box does not fit the place where it was intended to be placed,  what I did was to subtract 10 px from the width of the box, for it to fit some area, and at the same time I subtracted 10 px from the height also, thinking that doing so I kept the ratio of the initial sizes of the box.举例，如果一个框首先是100px高和60px宽，然后我注意到此框并不适合那里的目的的地方放置，我只不过是减去从框宽度10像素，它适合一些地区，并在同时，我减去高度也有10个像素，以为这样做，我一直在盒子的初步规模的比例。 In fact this is not true!事实上，这是不是真的！

Here's why:原因如下：

The ratio of the initial box is 100px/60px=1.66最初框比100px/60px = 1.66

In the second case the ratio is: (100px-10px)/(60px-10px)=1.8在第二种情况下的比例为：（100px - 10px）/（60px - 10px）= 1.8

So, if you used to apply the same technique as I did to quickly resize objects, forget about it, as it's wrong!因此，如果您使用相同的技术应用和我一样迅速调整对象，忘掉它，因为它是错的！ Instead use the old method from school to determine a variable from two fractions, preserving the ratios.而是利用学校的老办法来确定一个变量的两部分，保存率。 Back to the example above, in order to find out the new height value of the box I'd use this formula: 100px/60px=(100px-10px)/x, so x=60px*90px/100px=54px (instead of the incorrect value of 50px).回到上面的例子，为了找出在箱子我用这个公式：100px/60px =（100px，10px）/ x内，因此x = 60px * 90px/100px = 54px（而不是新的高度值在50像素不正确的值）。 That's it!就是这样！

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