compare

问题 In Java, Arrays.equals() allows to easily compare the content of two basic arrays (overloads are available for all the basic types). Is there such a thing in C#? Is there any \"magic\" way of comparing the content of two arrays in C#? 回答1: You could use SequenceEqual. This works for any IEnumerable<T> , not just arrays. 回答2: Use SequenceEqual in LINQ. int[] arr1 = new int[] { 1,2,3}; int[] arr2 = new int[] { 3,2,1 }; Console.WriteLine(arr1.SequenceEqual(arr2)); // false Console.WriteLine(arr1

问题 Basically I want to do this: obj = \'str\' type ( obj ) == string I tried: type ( obj ) == type ( string ) and it didn\'t work. Also, what about the other types? For example, I couldn\'t replicate NoneType . 回答1: isinstance() In your case, isinstance("this is a string", str) will return True . You may also want to read this: http://www.canonical.org/~kragen/isinstance/ 回答2: isinstance works: if isinstance(obj, MyClass): do_foo(obj) but , keep in mind: if it looks like a duck, and if it sounds

问题 I have two arrays of strings that I would like to compare for equality: my @array1 = (\"part1\", \"part2\", \"part3\", \"part4\"); my @array2 = (\"part1\", \"PART2\", \"part3\", \"part4\"); Is there a built-in way to compare arrays like there is for scalars? I tried: if (@array1 == @array2) {...} but it just evaluated each array in scalar context, and so compared the length of each array. I can roll my own function to do it, but it seems like such a low-level operation that there should be a

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I need to compare large count of PDF files for it optical content. Because the PDF files was created on different platforms and with

问题 Possible Duplicate: Object comparison in JavaScript Is there any method that takes in 2 JSON objects and compares the 2 to see if any data has changed? Edit After reviewing the comments, some clarification is needed. A JSON object is defined as \"an unordered set of name/value pairs. An object begins with { (left brace) and ends with } (right brace). Each name is followed by : (colon) and the name/value pairs are separated by , (comma).\" -- json.org My goal is to be able to compare 2 JSON

问题 The problem it\'s easy. Is there any function in JAVA to compare two Strings and return true ignoring the accented chars? ie String x = \"Joao\"; String y = \"João\"; return that are equal. Thanks 回答1: I think you should be using the Collator class. It allows you to set a strength and locale and it will compare characters appropriately. From the Java 1.6 API: You can set a Collator's strength property to determine the level of difference considered significant in comparisons. Four strengths

问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Easiest way to compare arrays in C# How can I compare two arrays in C#? I use the following code, but its result is false. I was expecting it to be true. Array.Equals(childe1,grandFatherNode); 回答1: You can use the Enumerable.SequenceEqual() in the System.Linq to compare the contents in the array bool isEqual = Enumerable.SequenceEqual(target1, target2); 回答2: You're comparing the object references , and they are

问题 I basically want to take two images taken from the camera on the iPhone or iPad 2 and compare them to each other to see if they are pretty much the same. Obviously due to light etc the image will never be EXACTLY the same so I would like to check for around 90% compatibility. All the other questions like this that I saw on here were either not for iOS or were for locating objects in images. I just want to see if two images are similar. Thank you. 回答1: As a quick, simple algorithm, I'd suggest

问题 How do I compare version numbers? For instance: x = 1.23.56.1487.5 y = 1.24.55.487.2 回答1: Can you use the Version class? http://msdn.microsoft.com/en-us/library/system.version.aspx It has an IComparable interface. Be aware this won't work with a 5-part version string like you've shown (is that really your version string?). Assuming your inputs are strings, here's a working sample with the normal .NET 4-part version string: static class Program { static void Main() { string v1 = "1.23.56.1487"

问题 I just found that this will work: echo $value , \" continue\"; but this does not: return $value , \" continue\"; While \".\" works in both. What is the difference between a period and a comma here? 回答1: return does only allow one single expression. But echo allows a list of expressions where each expression is separated by a comma. But note that since echo is not a function but a special language construct, wrapping the expression list in parenthesis is illegal. 回答2: You also have to note