diff | 易学教程

Postgresql UNION takes 10 times as long as running the individual queries

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问题 I am trying to get the diff between two nearly identical tables in postgresql. The current query I am running is: SELECT * FROM tableA EXCEPT SELECT * FROM tableB; and SELECT * FROM tableB EXCEPT SELECT * FROM tableA; Each of the above queries takes about 2 minutes to run (Its a large table) I wanted to combine the two queries in hopes to save time, so I tried: SELECT * FROM tableA EXCEPT SELECT * FROM tableB UNION SELECT * FROM tableB EXCEPT SELECT * FROM tableA; And while it works, it takes

how can I diff two sections of the same file?

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问题 I have a source file with two similar yet subtly different sections. I'd like to merge the two sections into one subroutine with a parameter that handles the subtle differences, but I need to be sure I'm aware of them all so I don't miss any. What I usually do in such cases is copy each of the sections to a separate file and then use tkdiff or vimdiff to highlight the differences. Is there any way to skip the intermediate files and just diff two parts of the same file? 回答1: The linediff

Mercurial - diff multiple changesets at same time?

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问题 To diff we use: hg diff -c <xyz> : Show diffs for a given changeset hg diff -r <xyz> : Show all diffs since a given changeset But let's say you have changesets 4-5-6-7-8 where changesets 4, 6, 8 were related to a particular area of the system and in one diff you wanted to see the changes made from JUST these three changesets, how would you do this? If file A was modified in changeset 4 and 8, the diff would show the difference between changeset 3 and 8. 回答1: If changesets 4,5,6,7,8 are linear

Git granularity — resolving diffs within a line

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问题 Is git line-based or diff granularity can be increased to a word/letter resolution? It is worth for multiple statements per line or using git for writing plain texts. 回答1: On re-reading the question in light of the comments, I think I see what you were getting at originally, so I'll put in a real answer (vs Ismail Badawi's one line comment). Git as simple storage Git has quite a collection of pieces, some of which play better together than others. At the lowest level, Git acts as a pure

Removing trailing white space only for edited lines

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问题 I had added the following function in my .vimrc for removing trailing white spaces just before saving fun! <SID>StripTrailingWhitespaces() let l = line(".") let c = col(".") %s/\s\+$//e call cursor(l, c) endfun autocmd BufWritePre *.h :call <SID>StripTrailingWhitespaces() autocmd BufWritePre *.cpp :call <SID>StripTrailingWhitespaces() autocmd BufWritePre *.c :call <SID>StripTrailingWhitespaces() It works really well. However, in certain cases I would like to remove trailing white spaces only

Is there any way to svn diff or svn merge across multiple non-sequential revisions at once?

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问题 So in SVN you can do things like: svn merge -r555:558 svn diff -c551 but (as far as I know) there is no way to do: svn merge -r555:558, 592:594 svn diff -c551, 557, 563 For merges you can always just do several commands in sequence: svn merge -r555:558 svn merge -r592:594 but for diffs doing that will just result in multiple diffs (and it's a little sub-optimal for merges too, as you can get conflicts from things that might just be removed in later revisions). So, my question is ... is there

how to compare two methods in eclipse

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问题 I want to compare two methods that I think are the same, but the eclipse refactor won't make extract method from their content together. Can I compare the two of the them using eclipse compare? the methods are of the same class. 回答1: I'm using Eclipse Kepler, so depending on your version your mileage may vary. To compare two methods in the same class, do the following: Open the class. Show the Outline view (Window->Show View->Outline) Hold CTRL and click on the two methods you wish to compare

Using the Visual Studio diff editor efficiently

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I am using Visual Studio 2015 and have a project that is versioned locally using Git. When I double-click on a file in the Team Explorer window, a Diff editor opens. From other IDEs (Eclipse, IntelliJ), I am used to managing my changes in these diff editors, like copying a chunk from the left to the right or the other way round. There is no middle bar that indicates such possible actions and no other clue. So when I want to revert a chunk of code, I have to select it on the left side, copy it to the clipboard, select the corresponding text on the right side, paste the text from the clipboard.

How to diff a file with specific revision in git?

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I don't know if git has concept of revision. I'd like to diff current working copy with older version of it(not neccesarily a last commit) Would be great if it could be done inside emacs. I've no idea about doing this inside emacs, but: git diff rev1..rev2 will do what you want for the whole repository. You can then add to that: git diff rev1>..rev2 path path can be an absolute path to a file, or a path to a directory, so you can diff subtrees. If you're looking to diff the working copy - just specify revision 1: git diff rev1 path The revision codes can be special names, e.g. HEAD^..HEAD

Why Managed and Unmanaged solution files are so much different in MS CRM?

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I created solution in MS Dynamics CRM, then exported it as managed and unmanaged one. Decompressed both and I ran diff tool on customizations.xml files. And there are too many difference between them, it's hard to say what exactly what was changed and why. Are these changes are crucial? May I create managed solution just by changing value in <Managed> tag to 1 instead of 0 ? Will it be safe? If you are shipping your solution to customer packaging a proper Managed Solution "with proper publisher and version" will be very critical part. If you'll go deep into customization you'll understand that