comparison

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 . Does anybody have any advice, experience, suggestions? I'm pretty comfortable with Google plugin - what would make me change to

问题 I am attempting to do the equivalent of if ( object1.class == object2.class ) { //do something } which of course doesn't work, what method am I overlooking? 回答1: If they're from the exact same class: boolean result = object1.getClass().equals( object2.getClass()); Now if they are compatible classes (if one is of a descendent class to the other): HashMap<String,Object> hashMap = new HashMap<String,Object>(); LinkedHashMap<String,Object> linkedHashMap = new LinkedHashMap<String,Object>();

问题 If you have strings like: "file_0" "file_1" "file_2" "file_3" "file_4" "file_5" "file_6" "file_11" how can you sort them so that "file_11" doesn't come after "file_1", but comes after "file_6", since 11 > 6. Do I have to parse the string and convert it into a number for this? Windows explorer in Win7 sorts files out the way I wanted. 回答1: You could import the StrCmpLogicalW function and use that to sort the strings. This is the very same function that Explorer itself uses for file names. Won

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Please tell me the basic difference between dotnet 2008 and 2010(3.5 and 4.0) 回答1: MSDN has a number of "What's New" pages up, including: "What's New in Visual Studio 2010" "What's New in the .NET Framework 4"

问题 I just familiarized myself with Apache JackRabbit. I've done a little multi-user repository for document management. If anybody used both of them, could you please answer these questions ? Is ModeShape somehow linked to JBoss ? I don't have much experience with JBoss AS or any other JBoss tools. I see a support for tomcat, but a lot of JBossy stuff Documentation says that future releases should have UI integration, is it far future ? What kind of UI integration would it be ? Is there

问题 I am compiling 2 C++ projects in a buildbot, on each commit. Both are around 1000 files, one is 100 kloc, the other 170 kloc. Compilation times are very different from gcc (4.4) to Visual C++ (2008). Visual C++ compilations for one project take in the 20 minutes. They cannot take advantage of the multiple cores because a project depend on the other. In the end, a full compilation of both projects in Debug and Release, in 32 and 64 bits takes more than 2 1/2 hours. gcc compilations for one

问题 I'm looking for a Linux command line tool to compare two PDF files and save the diffs to a PDF outfile. The tool should create diff-pdf's in a batch-process. The PDF files are construction plans, so pure text-compare doesn't work. Something like: <tool> file1.pdf file2.pdf -o diff-out.pdf Most of the tools I found convert the PDFs to images and compare them, but only with a GUI. Any other solution is also welcome. 回答1: I've written my own script that does something similar to what you're

问题 I've got a C# string extension method that should return an IEnumerable<int> of all the indexes of a substring within a string. It works perfectly for its intended purpose and the expected results are returned (as proven by one of my tests, although not the one below), but another unit test has discovered a problem with it: it can't handle null arguments. Here's the extension method I'm testing: public static IEnumerable<int> AllIndexesOf(this string str, string searchText) { if (searchText =

问题 I have 2 matrices, I want to compare them (row.name wise) to find the difference. > head(N1) Total_Degree Transitivity Betweenness Closeness_All 2410016O06RIK 1 NaN 0.00000 0.0003124024 AGO1 4 0.1666667 37.00000 0.0003133814 APEX1 4 0.6666667 4.00000 0.0003144654 ATR 4 0.1666667 19.50000 0.0003128911 CASP3 24 0.0000000 806.00000 0.0002980626 CCND2 4 0.3333333 97.33333 0.0003132832 head(N2) Total_Degree Transitivity Betweenness Closeness_All 2410016O06RIK 1 NaN 0.0 2.279982e-04 ADI1 1 NaN 0.0

问题 I know that when I would like to check if double == double I should write: bool AreSame(double a, double b) { return fabs(a - b) < EPSILON; } But what when I would like to check if a > b or b > a ? 回答1: There is no general solution for comparing floating-point numbers that contain errors from previous operations. The code that must be used is application-specific. So, to get a proper answer, you must describe your situation more specifically. For example, if you are sorting numbers in a list