compare | 易学教程

comparing two 2d arrays in jquery

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问题 I'm trying to compare two arrays both 2d, I need it only match when they're completely identical. The code I have is too lengthly, as the arrays will potentially be far longer. I tried playing with .each() and for loops but it get's very messy and won't compare every array. var solution=[ [0,0,0], [0,0,1], [0,0,1]]; var value=[ [0,0,0], [0,0,1], [0,0,1]]; //compare arrays if (solution[0][0]==value[0][0] && solution[0][1]==value[0][1] && solution[0][2]==value[0][2] && solution[1][0]==value[1]

java compare objects: using reflection?

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问题 I have an object which itself has multiple objects as fields. The question I have is, I have two objects of these kind and I want to compare these two. I know I can do equals, comparator etc. but is there a way to use reflection to get the properties of the object and make comparison. for example, if I have a Car object, which as wheels object, which has tires object, which has bolts object. Please remember all the above objects are individual and not nested classes. How do I compare 2 car

JavaScript array comparison with JSON response

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问题 I have this project I'm working on and I need to get all the vacant rooms from my school's timetable where I get my data from a JSON response. The JSON response looks like this: { "status": "success", "reservations": [ { "id": "19598", "subject": "subjectName", "modifiedDate": "2017-04-24T06:04:42", "startDate": "2017-04-24T08:00:00", "endDate": "2017-04-24T09:45:00", "resources": [ { "id": "795", "type": "student_group", "code": "groupCode", "name": "groupName" }, { "id": "599", "type":

cmp command returning EOF on my output despite exact match as far as i can tell

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问题 So I will start by saying this is for a course and I assume the professor won't really care that they are the same if cmp returns something weird. I am attempting to compare the output of my code, named uout, to the correct output, in the file correct0. The problem however is that it returns "cmp: EOF on uout". From a little bit of digging I found that EOF indicates they are the same up to the end of the shorter file with the shorter file being the one named after EOF, so what I gather from

Diff on hibernate envers revisions

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问题 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. 回答1: I don't think anything's changed

How does comparing images through md5 work?

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问题 Does this method compare the pixel values of the images? I'm guessing it won't work because they are different sizes from each other but what if they are identical, but in different formats? For example, I took a screenshot and saved as a .jpg and another and saved as a .gif . 回答1: An MD5 hash is of the actual binary data, so different formats will have completely different binary data. so for MD5 hashes to match, they must be identical files. (There are exceptions in fringe cases.) This is

Getting a boolean from a date compare in t-sql select

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问题 I am wondering if something along the lines of the following is possible in ms-sql (2005) SELECT (expiry < getdate()) AS Expired FROM MyTable WHERE (ID = 1) I basically want to evaluate the date compare to a boolean, is that possible in the select part of the statement? 回答1: Not directly. You have to use CASE, the CAST means it's interpreted as boolean by client code SELECT CAST(CASE WHEN expiry < getdate() THEN 1 ELSE 0 END AS bit) AS Expired FROM MyTable WHERE (ID = 1) Another solution

[商业]文本对比工具UltraCompare Professional

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UltraCompare专业版文件夹/文件比较功能，使您可以比较文本文件和文件夹，Word文档，甚至zip文件和JAR归档装载实用程序。 UltraCompare包括文本比较，二进制文件比较有能力合并比较的两个文件之间的差异。得到的文件夹？ UltraCompare还支持文件夹比较 - 包括本地/网络目录比较，zip文件比较，和FTP比较。 UltraCompare支持自动，方便的文件夹同步，和一个重复文件查找器以及。用UltraEdit或UEStudio自动集成，UltraCompare专业是一个比较工具，你不应该没有！下载一个免费试用版现在开始比较文件，跟踪分歧，并把它们合并... UltraCompare Professional可以为你做什么呢？比较文本你的工作与文本文件，并永远失去你的地方，或忘了这是目前大多数的文件吗？曾经希望你可以很容易比较文件版本之间的差异呢？编程如果你是手工检查您的文件或代码的变化，你失去了宝贵的时间，精度和生产力。比较和合并操作是一个差异工具的基石，我们放入UltraCompare许多合并/合并后的功能，这样你就可以很容易地比较差异和合并的信心和信任您的选择。无论你是一个孤独的开发者或作为一个团队的一部分工作，有多少次你想比较的文本文件或源代码，修改后的版本进行比较，并合并到较新版本的变化呢？系统管理我们都知道，使备份

Python 3.6.5 “is” and “==” for integers beyond caching interval [duplicate]

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问题 This question already has answers here : Why does the `is` operator behave differently in a script vs the REPL? (2 answers) Closed 9 months ago . I want to preface this by saying that I know the difference between == and is one is for references and the other is for objects. I also know that python caches the integers in the range (-5, 256) at startup so they should work when comparing them with is . However I have seen a strange behaviour. >>> 2**7 is 2**7 True >>> 2**10 is 2**10 False This

How to determine if a cv::Mat is a zero matrix?

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问题 I have a matrix that is dynamically being changed according to the following code; for( It=all_frames.begin(); It != all_frames.end(); ++It) { ItTemp = *It; subtract(ItTemp, Base, NewData); cout << "The size of the new data for "; cout << " is \n" << NewData.rows << "x" << NewData.cols << endl; cout << "The New Data is: \n" << NewData << endl << endl; NewData_Vector.push_back(NewData.clone()); } What I want to do is determine the frames at which the cv::Mat NewData is a zero matrix. I've