What does the unary plus operator do? There are several definitions that I have found ([here][1] and [here][2]) but I still have no idea what it would be used for. It seems like it doesn&#39;t do anything but there has be a reason for it, right? 


  [1]: https://web.archive.org/web/20130511040723/http://msdn.microsoft.com/en-us/library/aa691365(VS.71).aspx
  [2]: https://web.archive.org/web/20160222192353/http://www.csharp-station.com/Tutorials/Lesson02.aspx

What does the unary plus operator do?

How much is read from `ThreadLocal` variable slower than from regular field?

More concretely is simple object creation faster or slower than access to `ThreadLocal` variable?

I assume that it is fast enough so that having `ThreadLocal&lt;MessageDigest&gt;` instance is much faster then creating instance of `MessageDigest` every time. But does that also apply for byte[10] or byte[1000] for example?

Edit: Question is what is really going on when calling `ThreadLocal`&#39;s get? If that is just a field, like any other, then answer would be &quot;it&#39;s always fastest&quot;, right?

Performance of ThreadLocal variable

I wonder why isn&#39;t it implemented in the GUI?
I know git has a content approach vs. single file approach but sometimes single file reverting is crucial.

For instance an .png graphics file from a few commits before is needed.

Probably I need to do a checkout but I&#39;m still not sure as the concepts sometimes escape me.

How would you go about reverting a single file to previous commit state using git?

I wonder why isn't it implemented in the GUI?
I know git has a content approach vs. single file approach but sometimes single file reverting is crucial.
For instance an .png graphics file from a few commits before is needed.
Probably I need to do a checkout but I'm still not sure as the concepts sometimes escape me.

I&#39;ve been using Git for about a year now and think it&#39;s fantastic, but I&#39;ve just started on a second version of the project and started a new branch for it. I&#39;m struggling a little with the best way to handle things going forward.

I have two branches called say master10 (for v1) and master20 (for v2). I&#39;ve been making bug fixes in v1 on branch master10, and developing new stuff of master20. Whenever I make a bug fix I merge it into v2 by checking out master20 and doing `git merge master10`. So far so good.

Now however, I&#39;ve made a change in v1 that I don&#39;t want in v2, but I want to continue merging other bug fixes. How do I tell Git to skip that particular commit (or a range of commits), but that going forward I still want to merge other bug fixes.

I thought `git rebase` might be what I need but read the doc and my head nearly exploded.

I think what I want is something like a &quot;git sync&quot; command that tells git that two branches are now in-sync and in future only merge the commits from this sync-point on.

Any help appreciated.

git - skipping specific commits when merging

    $ git ls-tree fb3a8bdd0ce
    100644 blob 63c918c667fa005ff12ad89437f2fdc80926e21c    .gitignore
    100644 blob 5529b198e8d14decbe4ad99db3f7fb632de0439d    .mailmap
    100644 blob 6ff87c4664981e4397625791c8ea3bbb5f2279a3    COPYING
    040000 tree 2fb783e477100ce076f6bf57e4a6f026013dc745    Documentation
    100755 blob 3c0032cec592a765692234f1cba47dfdcc3a9200    GIT-VERSION-GEN
    100644 blob 289b046a443c0647624607d471289b2c7dcd470b    INSTALL
    100644 blob 4eb463797adc693dc168b926b6932ff53f17d0b1    Makefile
    100644 blob 548142c327a6790ff8821d67c2ee1eff7a656b52    README
    ...

I know the last 3 oct digits are file mode, but what are the first 3 digits for?
I can&#39;t find it out in git user&#39;s manual.

How to read the mode field of git-ls-tree&#39;s output

I don&#39;t want to add `schema.rb` to `.gitignore`, because I want to be able to load a new database schema from that file.  However, keeping it checked in is causing all sorts of spurious conflicts that are easily resolved by a fresh `db:migrate:reset`.

Basically I want a way to:

 2. Keep schema.rb in the repository for deploy-time database setup
 3. Keep schema.rb in &#39;.gitignore&#39; for general development

There would be one or two people responsible for updating `schema.rb` and knowing that it was correct.

Is there a way I can have my cake and eat it, too?


What is the preferred way to manage schema.rb in git?

I have a Git repository with few branches and dangling commits. I would like to search all such commits in repository for a specific string.

I know how to get a log of all commits in history, but these don&#39;t include branches or dangling blobs, just HEAD&#39;s history. I want to get them all, to find a specific commit that got misplaced.

I would also like to know how to do this in Mercurial, as I&#39;m considering the switch.

How to search through all Git and Mercurial commits in the repository for a certain string?

**Problem**

How do you create a shallow copy with git-svn from a Subversion repository, e.g. how do you pull only the last three revisions?

The `git clone` command can get the last n revisions from a Git repository if you use the option `--depth`, i.e. you get a shallow copy of the repository. Example:

    git clone --depth 3 git://some/repo myshallowcopyrepo

Is there a similar option for git-svn?

**My discoveries so far**

So far I&#39;ve only found the `-rN` option where `N` is the revision to pull. Example:

    git svn clone -rN svn://some/repo

According to the documentation there is the possibility to use `-r$REVNUMBER:HEAD`. I tried the following to get the last 3 revisions which returned an error message.

    $ git svn clone --prefix=svn/ -s -rHEAD~3:HEAD http://some/svn/repo .
    revision argument: HEAD~3:HEAD not understood by git-svn

So I replaced `HEAD~3` with the actual number of the third but last revision 534. That worked, but that requires me to first figure out the revision number of the third but last commit.

    $ git svn clone --prefix=svn/ -s -r534:HEAD http://some/svn/repo .


**Documentation**

[git-clone][1]

[git-svn][2]

  [1]: http://git-scm.com/docs/git-clone
  [2]: http://git-scm.com/docs/git-svn

How would you go about reverting a single file to previous commit state using git?

Git Problem Overview

Git Solutions

Performance of ThreadLocal variable

What does the unary plus operator do?

Attributions