Try:

    hg id -i

Example:


    $ hg id -i
    adc56745e928



    hg --debug id -i

This will output the long hash, with a plus if there are uncommitted changes.

You can use --template with the parent command, I use this to get the long hash:

    hg parent --template &#39;{node}&#39;

Summarising the answers and their responses, it seems that this is
the best way to print the *unique* (not short form) identifier
of the *current* version:

    hg log -l 1 --template &#39;{node}\n&#39; -r .


    hg log -l 1 --template &#39;{node|short}\n&#39;

See [the docs][1], paragraphs &quot;The basics of templating&quot; and following.


  [1]: http://hgbook.red-bean.com/read/customizing-the-output-of-mercurial.html

The most specific non-DEPRECATED command which due to the presence of `--template` can print only revision information if that conciseness is required (as implied by the question):

`hg log -l 1 -b . -T &#39;{rev}:{node|short}\n&#39;`

Or for unique long form of hash:

`hg log -l 1 -r . -T &#39;{node}\n&#39;`

The `-b .` or `branch(.)` (dot for branch name) [means the current working directory branch][1] and `-r .` means the current working directory revision, which is [documented](https://stackoverflow.com/questions/2485651/print-current-mercurial-revision-hash#comment14410883_2485923) in `hg help revsets` and [`hg help revisions`](https://www.selenic.com/hg/help/revisions).

Note if there is an [uncommitted merge](https://www.mercurial-scm.org/wiki/UnderstandingMercurial#line-157), the `.` (dot) only displays the [first parent](https://www.selenic.com/hg/help/revisions) of two parents of the working group.


  [1]: https://stackoverflow.com/questions/12957604/creating-a-mercurial-log-for-a-specific-branch#comment35144586_12957698

In case TortoiseHg is used, right-click the revision row in the Workbench and select &quot;Copy hash&quot; (as per [documentation][1]).

[![enter image description here][2]][2]


  [1]: http://tortoisehg.readthedocs.io/en/latest/workbench.html
  [2]: https://i.stack.imgur.com/lwhiv.png

As others have pointed out, don&#39;t use `log -l`.

Use `hg log -r .` to get detailed information, as opposed to using `hg id` whose output is limited and it does not support templates. You could also create a little alias like `here = log -r .` and use `hg here`. If you only want the hash use `hg log -r . --template &#39;{node}\n&#39;`. 

While there are multiple ways to reverse bit order in a byte, I&#39;m curious as to what is the &quot;simplest&quot; for a developer to implement.  And by reversing I mean:

    1110 -&gt; 0111
    0010 -&gt; 0100


This is similar to, but not a duplicate of [this][1] PHP question.

This is similar to, but not a duplicate of [this][2] C question. This question is asking for the easiest method to implement by a developer. The &quot;Best Algorithm&quot; is concerned with memory and cpu performance.


  [1]: https://stackoverflow.com/questions/1688532/how-to-reverse-bits-of-a-byte
  [2]: https://stackoverflow.com/questions/746171/best-algorithm-for-bit-reversal-from-msb-lsb-to-lsb-msb-in-c

In C/C++ what&#39;s the simplest way to reverse the order of bits in a byte?

I have a WebView in one of my Activities, and when it loads a webpage, the page gathers some background data from Facebook.

What I&#39;m seeing though, is the page displayed in the application is the same on each time the app is opened and refreshed.

I&#39;ve tried setting the WebView not to use cache and clear the cache and history of the WebView.

I&#39;ve also followed the suggestion here: [https://stackoverflow.com/questions/1790254/how-to-empty-cache-for-webview][1]

But none of this works, does anyone have any ideas of I can overcome this problem because it is a vital part of my application.

        mWebView.setWebChromeClient(new WebChromeClient()
    	{
    		   public void onProgressChanged(WebView view, int progress)
    		   {
    			   if(progress &gt;= 100)
    			   {
    				   mProgressBar.setVisibility(ProgressBar.INVISIBLE);
    			   }
    			   else
    			   {
    				   mProgressBar.setVisibility(ProgressBar.VISIBLE);
    			   }
    		   }
    	});
    	mWebView.setWebViewClient(new SignInFBWebViewClient(mUIHandler));
    	mWebView.getSettings().setJavaScriptEnabled(true);
    	mWebView.clearHistory();
    	mWebView.clearFormData();
    	mWebView.clearCache(true);
    	
    	WebSettings webSettings = mWebView.getSettings();
    	webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
    	
    	Time time = new Time();
    	time.setToNow();
    	
    	mWebView.loadUrl(mSocialProxy.getSignInURL()+&quot;?time=&quot;+time.format(&quot;%Y%m%d%H%M%S&quot;));

  [1]: https://stackoverflow.com/questions/1790254/how-to-empty-cache-for-webview





So I implemented the first suggestion (Although changed the code to be recursive)

    private void clearApplicationCache() {
        File dir = getCacheDir();

        if (dir != null &amp;&amp; dir.isDirectory()) {
            try {
                ArrayList&lt;File&gt; stack = new ArrayList&lt;File&gt;();

                // Initialise the list
                File[] children = dir.listFiles();
                for (File child : children) {
                    stack.add(child);
                }

                while (stack.size() &gt; 0) {
                    Log.v(TAG, LOG_START + &quot;Clearing the stack - &quot; + stack.size());
                    File f = stack.get(stack.size() - 1);
                    if (f.isDirectory() == true) {
                        boolean empty = f.delete();

                        if (empty == false) {
                            File[] files = f.listFiles();
                            if (files.length != 0) {
                                for (File tmp : files) {
                                    stack.add(tmp);
                                }
                            }
                        } else {
                            stack.remove(stack.size() - 1);
                        }
                    } else {
                        f.delete();
                        stack.remove(stack.size() - 1);
                    }
                }
            } catch (Exception e) {
                Log.e(TAG, LOG_START + &quot;Failed to clean the cache&quot;);
            }
        }
    }

However this still hasn&#39;t changed what the page is displaying. On my desktop browser I am getting different html code to the web page produced in the WebView so I know the WebView must be caching somewhere.

On the IRC channel I was pointed to a fix to remove caching from a URL Connection but can&#39;t see how to apply it to a WebView yet.

http://www.androidsnippets.org/snippets/45/

If I delete my application and re-install it, I can get the webpage back up to date, i.e. a non-cached version. The main problem is the changes are made to links in the webpage, so the front end of the webpage is completely unchanged.

Android Webview - Completely Clear the Cache

Is there a better way extract the current revision hash in Mercurial than

`hg log -l1|grep changeset|cut -d: -f3`

?

Part of my webapp deployment script &quot;tags&quot; the uploaded app tarball with its unique revision hash.

Print Current Mercurial Revision Hash?

Is there a better way extract the current revision hash in Mercurial than
<code>hg log -l1|grep changeset|cut -d: -f3</code>
?
Part of my webapp deployment script "tags" the uploaded app tarball with its unique revision hash.

I&#39;m looking for a very quick way to generate an alphanumeric unique id for a primary key in a table.

Would something like this work?

    def genKey():
        hash = hashlib.md5(RANDOM_NUMBER).digest().encode(&quot;base64&quot;)
        alnum_hash = re.sub(r&#39;[^a-zA-Z0-9]&#39;, &quot;&quot;, hash)
        return alnum_hash[:16]

What would be a good way to generate random numbers?
If I base it on microtime, I have to account for the possibility of several calls of genKey() at the same time from different instances.

Or is there a better way to do all this?

Efficiently generate a 16-character, alphanumeric string

I have a counter hash that I am trying to sort by count. The problem I am running into is that the default Hash.sort function sorts numbers like strings rather than by number size.

i.e. Given Hash:

    metrics = {&quot;sitea.com&quot; =&gt; 745, &quot;siteb.com&quot; =&gt; 9, &quot;sitec.com&quot; =&gt; 10 }

Running this code:

    metrics.sort {|a1,a2| a2[1]&lt;=&gt;a1[1]}

will return a sorted array:

    [ &#39;siteb.com&#39;, 9, &#39;sitea.com&#39;, 745, &#39;sitec.com&#39;, 10]

Even though 745 is a larger number than 9, 9 will appear first in the list. When trying to show who has the top count, this is making my life difficult. :)

Any ideas on how to sort a hash (or an array even) by number value size?

I appreciate any help.

How to sort a Ruby Hash by number value?

C++0x adds `hash&lt;...&gt;(...)`.

I could not find a `hash_combine` function though, as presented in [boost][1].  What is the cleanest way to implement something like this?  Perhaps, using C++0x `xor_combine`?


  [1]: http://www.boost.org/doc/libs/1_37_0/doc/html/hash/reference.html#boost.hash_combine

How do I combine hash values in C++0x?

I&#39;m trying to think up a good hash function for strings.  And I was thinking it might be a good idea to sum up the unicode values for the first five characters in the string (assuming it has five, otherwise stop where it ends).  Would that be a good idea, or is it a bad one?

I am doing this in Java, but I wouldn&#39;t imagine that would make much of a difference.

Good Hash Function for Strings

I need to hash some passwords with salt on postgresql, and I haven&#39;t been able to find any relevant documentation on how to get that done.  

So how can I hash passwords (with some salts) in postgresql?

How can I hash passwords in postgresql?

I&#39;m just getting started with Mercurial, and I&#39;ve come across something which I don&#39;t understand.

I made changes to several files, and now I want to undo all the changes I made to one of them (i.e. go back to my last commit for one specific file).

As far as I can see, the command I want is [revert][1].

In the page I linked to, there is the following statement:

&gt; This operation however does not change
&gt; the parent revision of the working
&gt; directory (or revisions in case of an
&gt; uncommitted merge). To undo an
&gt; uncomitted merge, you can use &quot;hg
&gt; update -C -r.&quot; which will reset the
&gt; parents to the first parent.

I don&#39;t understand the difference between the two (`hg revert` vs. `hg update -C -r`). Can anyone enlighten me as to the difference? And in my case, do I really want the revert or the update to go get rid of the changes I made to the file?



  [1]: https://www.mercurial-scm.org/wiki/Revert

Difference between Revert and Update in Mercurial

This is a question that&#39;s been bothering me for a while. I&#39;ve done my homework and checked stackoverflow and found at least these two topics about my question:
[Git for Mercurial like git-svn][1] and
[Git interoperability with a Mercurial repository][2]

I&#39;ve done some serious googling to solve this issue, but so far with no luck. I&#39;ve also read the [Git Internals][3] book, and the [Mercurial Definitive Behind the Scenes][4] to try to figure this out. I&#39;m still a bit puzzled why I haven&#39;t been able to find any suitable git-hg type of a tool. 

From my perspective git-svn is one of the main features, why I&#39;ve chosen to use git over mercurial also at work. It allows me to use a workflow I like, and nobody else needs to bother, if they don&#39;t care. I just don&#39;t see the point in using the intermediate hg repo to convert back and forth, as suggested in one of the chains. 

So anyway, from what I&#39;ve read hg and git seem very similar in conceptual design. There are [differences under the hood][5], but none of those should prevent creating a git client for hg. As it seems to me, remote tracking branches and octopus merges make git even more powerful than hg is. 

So, the real question, is there any real reason why git-hg does not exist (or at least is very hard to find)? 
Is there some animosity from git users (and developers) towards their hg counterparts that has caused the lack of the git-hg tool?
Do any of you have any plans to develop something like this, and go public with it? I could volunteer (although with very feeble C-skills) to participate to get this done. I just don&#39;t possess the full knowledge to start this up myself.

Could this be the tool to end all DVCS wars for good? 


  [1]: https://stackoverflow.com/questions/1714015/git-for-mercurial-like-git-svn
  [2]: https://stackoverflow.com/questions/883452/git-interoperability-with-a-mercurial-repository
  [3]: http://peepcode.com/products/git-internals-pdf
  [4]: http://hgbook.red-bean.com/read/behind-the-scenes.html
  [5]: https://stackoverflow.com/questions/1598759/git-and-mercurial-compare-and-contrast

Git as mercurial client? Why no git-hg?

I&#39;m using Mercurial locally for a project (it&#39;s the only repo there&#39;s no pushing/pulling to/from anywhere else).

To date it&#39;s got a linear history.  However, the current thing I&#39;m working on I&#39;ve now realized is a terrible approach and I want to go back to the version before I started it and implement it a different way.

I&#39;m a bit confused with the `branch` / `revert` / `update -C` commands in Mercurial.  Basically I want to revert to version 38 (currently on 45) and have my next commits have 38 as a parent and carry on from there.  I don&#39;t care if revisions 39-45 are lost for ever or end up in a dead-end branch of their own.

Which command / set of commands do I need?

Mercurial — revert back to old version and continue from there

I downloaded TortoiseHg 1.0 for evaluation.  For the life of me I can&#39;t figure out how to make a branch.  It seems to understand branches (e.g. in its repository browser) but I just can&#39;t seem to find a way to make a branch.  This seems like such a fundamental capability since out of the often touted benefits of DVC is the lightweight branching.

I Googled around and couldn&#39;t find much discussion of this topic (at least for recent versions) so I have to assume I&#39;m missing something, right?

**Update:** So I flagged Chad Birch&#39;s answer below to answer the &quot;new branch&quot; issue.  As he correctly points out, you do a commit and then click on the branch button to bring up the branch maintenance dialog which is where you create new branches.  I kind of wish they had given us a context menu option for this.  Once you&#39;ve branched, the next natural question is how to merge and this is also not obvious.  It turns out that option is buried in the repository explorer.  You need to select the head of another branch, right-click and then select &quot;Merge with...&quot;.

How to branch with TortoiseHG

I&#39;m new to collaborating with Mercurial. My situation:

- Another programmer changed rev 1 of a file to replace 4-space indents with 2-space indent. (I.e. changed every line.) Call that rev 2, pushed to the remote repo.
- I&#39;ve committed substantive changes rev 1 with various code changes in my local workspace. Call that rev 3. 
- I&#39;ve `hg pull`ed and `hg merge`d without a clear idea of what was going on.
- The conflicts are myriad and not really substantive.

So I really wish I&#39;d changed my local repo to 2-space indents before merging; then the merge will be trivial (i&#39;m supposing). But I can&#39;t seem to back up. I think I need to `hg update -r 3` but it says `abort: outstanding uncommitted merges`. 

How can I undo the merge, changes spacing in my local repo, and remerge?


How to abandon a hg merge?

For a given file in a Mercurial repository, how can you see the revision history?

And how can you diff two revisions of the file?  

Ideally doing all this with visual tools (we use ExamDiff to do some other diffs).

I&#39;d say this is basic source control functionality but I can&#39;t seem to figure out how to do this with Mercurial.

How to view revision history for Mercurial file?

How can I clone git repository with specific revision, something like I usually do in Mercurial:

    hg clone -r 3 /path/to/repository

How to clone git repository with specific revision/changeset?

I have an SVN file which is now missing some logic and so I need to go back about 40 revisions to the time when it had the logic I need. Other than trying to view a diff of the file in the command line (*very hard to read*), is there any way I could get a copy of that file to review so I can study it to recover parts?

How do I view an older version of an SVN file?

What is the easiest way to revert my working copy to a previous revision using Windows [TortoiseSVN][1]?

I did not find any &quot;findable&quot; command to do that quickly.

  [1]: http://en.wikipedia.org/wiki/TortoiseSVN


Reverting to a previous revision using TortoiseSVN

I am trying to merge the latest changes from trunk into a branch of my project, but the problem is I don&#39;t know what revision of the trunk I checked out that I eventually created the branch from.  I would think SVN logged this somewhere.  Does anyone know how I can find the revision number?

(In other words, the Subversion equivalent of `git merge-base master branch-name`)

Content Type	Original Author	Original Content on Stackoverflow
Question	rentzsch	View Question on Stackoverflow
Solution 1 - Hash	Ry4an Brase	View Answer on Stackoverflow
Solution 2 - Hash	Frank	View Answer on Stackoverflow
Solution 3 - Hash	shadowspawn	View Answer on Stackoverflow
Solution 4 - Hash	rog	View Answer on Stackoverflow
Solution 5 - Hash	Alex Martelli	View Answer on Stackoverflow
Solution 6 - Hash	Shelby Moore III	View Answer on Stackoverflow
Solution 7 - Hash	texnic	View Answer on Stackoverflow
Solution 8 - Hash	Gru	View Answer on Stackoverflow

Print Current Mercurial Revision Hash?

Hash Problem Overview

Hash Solutions

Solution 1 - Hash

Solution 2 - Hash

Solution 3 - Hash

Solution 4 - Hash

Solution 5 - Hash

Solution 6 - Hash

Solution 7 - Hash

Solution 8 - Hash

Android Webview - Completely Clear the Cache

In C/C++ what's the simplest way to reverse the order of bits in a byte?

Attributions