compare

How to compare objects using operator < or > in Objective-C?

柔情痞子 提交于 2019-12-06 04:21:45
How do I compare two objects of a custom class in Objective-C? I try to overloading the - (NSComparisonResult)compare:(id)other; method. This works great if I call the method manually if ([obj1 compare:obj2] == NSOrderedDescending) { // do something } Is there any way that I can do it like this? if (obj1 > obj2) { // do something } Or is there another method that I need to overload? This is not possible, since objective C doesn't have operator overloading. You are comparing pointer values. One way to achieve this is for your class you can define comparisons to everything that make sense to

string comparison in python but not Levenshtein distance (I think)

做~自己de王妃 提交于 2019-12-06 02:26:21
I found a crude string comparison in a paper I am reading done as follows: The equation they use is as follows (extracted from the paper with small word changes to make it more general and readable) I have tried to explain a bit more in my own words since the description by the author is not very clear (using an example by the author) For example for 2 sequences ABCDE and BCEFA, there are two possible graphs graph 1) which connects B with B C with C and E with E graph 2) connects A with A I cannot connect A with A when I am connecting the other three (graph 1) since that would be crossing

Beyond Compare比较图片怎么修改背景颜色

余生颓废 提交于 2019-12-06 00:38:23
Beyond Compare作为一款专业的文件夹以及文本比较工具,它拥有强大的比较功能,并将文件差异以不同的颜色标注,方便查阅。为了体现人性化的设计理念, Beyond Compare 也支持多种个性化设置,今天就和大家分享一下,Beyond Compare比较图片怎么修改背景颜色,以符合每个用户的使用习惯。 具体的操作步骤如下: 步骤一:打开Beyond Compare软件,选择图片比较会话操作,打开操作界面。 单击“打开文件”按钮,选择需要比较的图片。 Beyond Compare图片比较会话操作界面图例 步骤二: 在图片比较会话界面,单击“工具”菜单,在展开的菜单项中选择“选项”命令。 Beyond Compare图片比较会话工具菜单--选择选项命令图例 步骤三:在弹出的选项对话框窗口,单击选择左侧目录中“颜色,字体”选项,在右侧与之对应的界面中,选择“图片比较“栏目。 Beyond Compare图片比较工具菜单选择窗口界面图例 步骤四:图片比较可修改的背景颜色有:常规和容差模式颜色,可以根据个人需求,自定义修改颜色,背景颜色修改设置完成后单击“应用”按钮,确定后关闭窗口。 Beyond Compare设置图片比较背景颜色修改界面图例 上述的内容给大家详细讲解了,Beyond Compare比较图片怎么修改背景颜色的方法,学会了此方法就可以自定义差异的标注颜色

What is an efficient way to measure similarity between two strings? (Levenshtein Distance makes stack too deep)

荒凉一梦 提交于 2019-12-05 23:51:55
So, I started with this: http://en.wikibooks.org/wiki/Algorithm_Implementation/Strings/Levenshtein_distance#Ruby Which works great for really small strings. But, my strings can be upwards of 10,000 characters long -- and since the Levenshtein Distance is recursive, this causes a stack too deep error in my Ruby on Rails app. So, is there another, maybe less stack intensive method of finding the similarity between two large strings? Alternatively, I'd need a way to make the stack have much larger size. (I don't think this is the right way to solve the problem, though) Consider a non-recursive

Diff on hibernate envers revisions

[亡魂溺海] 提交于 2019-12-05 23:23:18
This is a question related to: Hibernate Envers revision info (changes list) and Getting the old value and new value between two revisions with Hibernate Envers Since these questions are a few years old I would like to know if there has anything changed? Is it now possible to retrieve diffs with envers? Or do I still have to load two revisions and compare them by myself in Java? And if so - what's the best way to compare the two version in Java? Thanks. I don't think anything's changed on the Envers side 来源: https://stackoverflow.com/questions/30726464/diff-on-hibernate-envers-revisions

Beyond Compare怎么设置比较文件夹对齐方式

大兔子大兔子 提交于 2019-12-05 22:38:59
在文件比较工具中 Beyond Compare 是非常专业的,其特点是性能强大并且容易操作,适用范围也非常的广,不论是文件夹,图片,程序代码,文本,表格都可以拿来比较。在使用Beyond Compare的过程中我们会发现其有着自己默认的排列方式,但是有时我们需要换种方式。下面我们来给大家分享一下Beyond Compare怎么设置比较文件夹对齐方式? 原文:http://www.beyondcompare.cc/jiqiao/wenjianjia-duiqi.html 具体操作步骤如下所示 步骤一:打开Beyond Compare软件,选择文件夹比较会话,打开会话操作界面。单击“浏览文件夹”按钮选择需要对比的文件夹。 Beyond Compare文件夹比较会话操作界面图例 步骤二:选中左侧或者右侧比较窗格的某个文件夹,右键单击该文件夹并在展开的菜单中选择“比较”选项卡。随后选中文件夹用荧光色标注显示,并且出现带有问号的箭头图标。 Beyond Compare文件夹比较会话设置对齐方式操作界面图例 步骤三:假设现在将右侧“代码”文件夹和左侧“代码一”文件夹设置为对齐比较,在已经选择左侧“代码”文件夹的情况下,直接用带有问号的箭头图标点击左侧“代码一”文件夹,即可完成对齐比较设置。 右侧“代码”文件夹和左侧“代码一”文件夹对齐比较 上述内容详细的讲解了,Beyond

怎么用Beyond Compare比较代码

十年热恋 提交于 2019-12-05 22:36:56
每个站长或多或少都会对文件进行一些代码修改,打补丁的时候如果直接覆盖补丁文件的话,那么之前修改过的代码就没有了。因此,我们需要进行代码比对然后合成一个既保留了我们之前的修改代码又增加了补丁代码的特殊补丁包,这时我们就需要使用到文件对比工具,这里介绍使用 Beyond Compare 比较代码的方法。 Beyond Compare是一款经典老牌且优秀的专业级文件比较软件,使用它可以很方便地对比出两个文件夹或文件(如代码/网页/文本文件等)之间的不同之处,它会把有差异的每一个行或每一个字均用颜色标注出来,你不仅可以直观地查看、定位全部差异点,还能非常方便地修改它们。 具体的操作步骤如下: 步骤一 下载并安装Beyond Compare软件。最新版Beyond Compare 4中文版可在Beyond Compare中文官网进行下载。 步骤二 打开Beyond Compare软件,选择左侧“文本比较”并双击; 双击软件界面左边的“文本比较”按钮 步骤三 在打开的文本比较会话界面把要对比的两个代码文件分别拖到左右的两个框里; 拖动代码文件到文本比较会话界面示例 步骤四 打开后自动就会把不同的区域标为红色了,如下图所示; 自动使用红色标出差异部分示例 步骤五 左边的小栏中的红色是整个代码中有不同的地方,如下图所示; 在左侧小栏中使用红色标出代码不同部分示例 步骤六 拖动滚动条

怎样才能快速的对比图片之间的差异

淺唱寂寞╮ 提交于 2019-12-05 22:36:32
当你还在为比较大量图片而头疼加班时,我们的帅锅美女已经开开心心的坐上了回家的公交车,人的精力是有限的,而软件的功能它是无穷无尽的,会给你带来你想要的结果,那么这款神奇的软件是啥呢?它就是一款广得民心的全球性价比最高的专业文件对比工具-- Beyond Compare ,它不仅可以对比文件夹和文本,也是一款超级实用的图片比较软件。 Beyond Compare比较图片时有哪些应用呢?设置图片旋转、全屏显示图片、查看实际尺寸、自动缩放对比图片、修改图片背景颜色。 设置图片旋转:在Beyond Compare图片比较界面中,视图的下拉菜单中有五项图片旋转方式可供选择。 全屏显示图片:默认情况下,在图片比较窗格中,图片以适合窗格尺寸显示。如果想要图片全屏显示,则可以视图下拉菜单中有个“全屏”,点击即可。 查看实际尺寸:这个也是人们常常用到的一项,查看图片的实际尺寸,这个按钮也在视图下拉菜单中,缩放里有个实际尺寸。 自动缩放对比图片:单击图片比较会话工具栏“视图”菜单,在展开的菜单中选择“自动缩放”选项,自动缩放操作即自动放大比较两侧图片中相对较小的图片,匹配规模较大的图片。再次回到图片比较会话操作界面,需要比较的图片尺寸完全相同,可以进行匹配比较。您可以滑动比较界面内“缩放”和“容差”的调节杆,选择合适的尺寸和像素查看图片差异部分。 修改图片背景颜色

find common elements in >2 files

本小妞迷上赌 提交于 2019-12-05 22:22:52
问题 I have three files as shown below file1.txt "aba" 0 0 "aba" 0 0 1 "abc" 0 1 "abd" 1 1 "xxx" 0 0 file2.txt "xyz" 0 0 "aba" 0 0 0 0 "aba" 0 0 0 1 "xxx" 0 0 "abc" 1 1 file3.txt "xyx" 0 0 "aba" 0 0 "aba" 0 1 0 "xxx" 0 0 0 1 "abc" 1 1 I want to find the similar elements in all the three files based on first two columns. To find similar elements in two files i have used something like awk 'FNR==NR{a[$1,$2]++;next}a[$1,$2]' file1.txt file2.txt But, how can we find similar elements in all the files,

Rules to implement compare method

我们两清 提交于 2019-12-05 21:41:58
like compareTo, that have to be "reflexive, antisymmetric and transitive", are there any rules to implement the compare method?? thanks PermGenError From Comparator API : The implementor must ensure that sgn(compare(x, y)) == -sgn(compare(y, x)) for all x and y. (This implies that compare(x, y) must throw an exception if and only if compare(y, x) throws an exception.) The implementor must also ensure that the relation is transitive: ((compare(x, y)>0) && (compare(y, z)>0)) implies compare(x, z)>0. Finally, the implementor must ensure that compare(x, y)==0 implies that sgn(compare(x, z))==sgn