diff

问题 While searching for a solution to my problem I found this thread: Function "diff" over various groups in R. I've got a very similar question so I'll just work with the example there. This is what my desired output should look like: name class year diff 1 a c1 2009 NA 2 a c1 2010 67 3 b c1 2009 NA 4 b c1 2010 20 I have two variables which form subgroups - class and name. So I want to compare only the values which have the same name and class. I also want to have the differences from 2009 to

问题 any one may have an idea of realizing the function of "diff" command with perl? Thanks 回答1: You can use the CPAN module Algorithm::Diff for computing the difference between two files or lists. 回答2: There's a diff in the Perl Power Tools on CPAN. 来源： https://stackoverflow.com/questions/5498569/how-to-implement-diff-with-perl

问题 I am hoping to use a windows "send-to" .bat file to run a differential between two text files using the FC command line tool. My current batch is: fc "%1" "%2" pause All FC requires from the command line is FC file1 file2 I want to select two text files and run them through the batch file via send-to. 回答1: If both files are in the same folder: @fc "%~1" "%~2" & pause 来源： https://stackoverflow.com/questions/31639056/multiple-inputs-in-a-windows-batch-file-using-fc

问题 In a shell script, I would like to check whether two PNG images are different in the sense that either the images have different sizes or at least one pixel of one image has a different RGBA than the corresponding pixel of the other image. Hashing the two image files will not work because the images could be compressed differently or have a different comment or perhaps two pixels are fully transparent but the RGB components differ, etc. I know how to check whether the file sizes are different

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . I am reading source code of mercurial,but what I saw in bdiff.c and mdiff.py is processing text, not binary.but they said mercurial treat all files as binary.I am confused. 回答1: bdiff.c and mdiff.py both works perfectly fine on binary files. They won't give you optimal diffs since they rely on the presence of

问题 I tried running 'diff' against two source directories get a patch file with a 'diff' between the two directories. diff -rupN flyingsaucer-R8pre2_b/ flyingsaucer-R8pre2/ > a.patch The command above does not seem to work, it generates a diff of everything and I get a 13 MB file, when in reality, it should be a couple of changes. 回答1: Should work with any recent version of gnu diff (tested here with gnu diff 2.8.1.) You might want to add -b (and perhaps -B) to ignore difference in white space

问题 I would like to obtain a MySQL function which calculates the difference between the 2 varchar fields in a diff patch format . Any developer which have familiarity with SVN or Git knows how a " patch " file is calculated through a diff tool, I would like to create this procedure in MySQL. Let's take two very long string from a varchar field in MySQL. The two long text which are the 1st and 2nd version of the same article / piece of code. They are about 1000 words long and differ just for this

问题 I am running Puppet v3.0 on RHEL 6 and am doing package management via the exec resource. I would like to add a number of control gates into my manifest via onlyif and unless . First I would like to use booleans as defined in Hiera [ auto lookup function ]. Secondly I would like to use booleans from a bash script running diff <() <() . Im using the following hiera data : --- my-class::package::patch_now: 0 my-class::package::package_list: acl-2.2.49-6.el6-x86_64 acpid-1.0.10-2.1.el6-x86_64 ..

问题 First, let me begin by telling you the details on the problem I'm trying to solve. We have a third party application that uses Xml Documents to store all of it's business logic and look up tables and such. The application has a base set of Xml Files, and uses a kind of inheritance model to expose inherited Xml files that we're to edit to customize the business logic. I say "Kind of" due to the horrible implementation of inheritance it uses. Currently there are over 3000 seperate Xml files

问题 I'm having problems trying to setup an external diff program for svn on Mac OSX Lion. I have both xxdiff and opendiff installed. I add these lines to ~/.subversion/config: diff-cmd = opendiff diff3-cmd = opendiff or diff-cmd = /Applications/xxdiff.app/Contents/MacOS/xxdiff diff3-cmd = /Applications/xxdiff.app/Contents/MacOS/xxdiff But when I invoke svn, I get this error: svn: /Users/tre11/.subversion/config:49: Option expected How do I fix this problem? 回答1: There aren't many diff utilities,