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• Why do "ls" in UNIX and "dir" in DOS have different names?

  - by bizso09

  Why do they have different names for the same command, listing a directory? Surely, they could have talked to each other and agreed on one common name, such as for example cd which is the same for both unix and dos. This decision to have different names has created many headaches for developers and users and also increased incompatibility between the two systems. Did they do it on purpose? Then how come "cd" is the same?

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• Is there a historical computer peripherals or accessories museum or even just a current list?

  - by zimmer62

  Thinking about all the unique and different peripherals I've owned over the years, from ISA capture cards, to parallel port controlled shutter glasses for 3d games. I've seen many many accessory or computer peripherals come and go. The nostalgia of these things is a lot of fun. I tried to find some sort of historical time-line or list but what mostly turned up is computers themselves. I'm more interested in the mice, scanners, the weird adapters that shouldn't exist, short run very rare products, strange devices from computer shows in the 80's and 90's... Hardware you might find in a geeks basement that would be completely useless now, but was the coolest thing around when it was new. An example would be a drawing tablet I had for my TI-99 computer, or the audio tape player accessory for a C64 which let you save files to audio tapes, An ISA card that did the same for PC's hooked up to a VCR. Remember that IBM-PC Jr upgrade kit, that added a floppy drive, more memory and the AT switch in the back? I'd love to find either a wiki, or a list that has already been assembled which contain many of these weird (or common) accessories. I've had so many over the years I suppose I could start a wiki here if such a list doesn't already exist.

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• What does the 'X' in .aspx, docx, xlsx, etc... represent?

  - by Serapth

  It's one of those things you just take for granted until one day someone asks you and you realize you can't answer it. Much like for years I never questioned the use of 1033 directories in Microsoft products for years until one day, someone asked me about it. Around the release of .NET and Office 2007, Microsoft added an x to basically all of their extensions and I frankly took it as representing XML, but that simply doesn't make sense with .aspx. So, I realize this is a very non technical question, but now that the question has been asked of me and my googling hasn't given me an answer, can anyone tell me with authority what the X represents? Is it extended? Xml? Or is there no meaning behind it?

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• Software for browsing/searching SQL Server transaction logs

  - by CodeByMoonlight

  I'd like to know whether there is any piece of software that will allow the browsing/searching of SQL Server transaction logs (any version). We've previously used Lumigent Log Explorer against SQL Server 2000 which fulfilled our need, but the product no longer exists and Lumigent's closest replacement doesn't appear to support SQL 2008 (according to the data sheet). I've discovered something called ApexSQL Audit which may fit the bill, but I'm wondering if anyone has any experience of it, how it compares with Log Explorer, and whether there are any good alternatives out there. Thanks :)

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• How do I change the .bash_history file location?

  - by Brian Graham

  I'm running CentOS 6.x and want to move the .bash_history to a different location. The home directories of my users are (because I run a VPS) in /var/www/vhost/<domain>.<tld> which is FTP accessible (and it should be). Because of this, I have changed the AuthorizedKeysFile for SSH connections out of the normal ~/.ssh/authorized_keys since FTP connections would easily be able to locate them. At the same time I want to move the .bash_history file to /home/%u/.bash_history where %u is the current user.

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• How do I find out when and by whom a particular user was deleted in linux?

  - by executor21

  I've recently ran into a very odd occurrence on one system I'm using. For no apparent reason, my user account was deleted, although the home directory is still there. I have root access, so I can restore the account, but first, I want to know how this happened, and exactly when. Inspecting the root's .bash_history file and the "last" command gave nothing, and I'm (well, was) the only sudoer on the system. How would I know when this deletion happened? The distro is CentOS release 5.4 (Final), if that helps.

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• Are 'edited by' inline comments the norm in shops which use revision control?

  - by Joshua Smith

  The senior dev in our shop insists that whenever code is modified, the programmer responsible should add an inline comment stating what he did. These comments usually look like // YYYY-MM-DD <User ID> Added this IF block per bug 1234. We use TFS for revision control, and it seems to me that comments of this sort are much more appropriate as check-in notes rather than inline noise. TFS even allows you to associate a check-in with one or more bugs. Some of our older, often-modified class files look like they have a comment-to-LOC ratio approaching 1:1. To my eyes, these comments make the code harder to read and add zero value. Is this a standard (or at least common) practice in other shops?

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• Huge file in Clojure and Java heap space error

  - by trzewiczek

  I posted before on a huge XML file - it's a 287GB XML with Wikipedia dump I want ot put into CSV file (revisions authors and timestamps). I managed to do that till some point. Before I got the StackOverflow Error, but now after solving the first problem I get: java.lang.OutOfMemoryError: Java heap space error. My code (partly taken from Justin Kramer answer) looks like that: (defn process-pages [page] (let [title (article-title page) revisions (filter #(= :revision (:tag %)) (:content page))] (for [revision revisions] (let [user (revision-user revision) time (revision-timestamp revision)] (spit "files/data.csv" (str "\"" time "\";\"" user "\";\"" title "\"\n" ) :append true))))) (defn open-file [file-name] (let [rdr (BufferedReader. (FileReader. file-name))] (->> (:content (data.xml/parse rdr :coalescing false)) (filter #(= :page (:tag %))) (map process-pages)))) I don't show article-title, revision-user and revision-title functions, because they just simply take data from a specific place in the page or revision hash. Anyone could help me with this - I'm really new in Clojure and don't get the problem.

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• Cannot get Correct month for a call from call log history

  - by Nishant Kumar

  I am trying to extract information from the call log of the android. I am getting the call date that is one month back from the actual time of call. I mean to say that the information extracted by my code for the date of call is one mont back than the actual call date. I have the following in the Emulator: I saved a contact. Then I made a call to the contact. Code: I have 3 ways of extracting call Date information but getting the same wrong result. My code is as follows: /* Make the query to call log content */ Cursor callLogResult = context.getContentResolver().query( CallLog.Calls.CONTENT_URI, null, null, null, null); int columnIndex = callLogResult.getColumnIndex(Calls.DATE); Long timeInResult = callLogResult.getLong(columnIndex); /* Method 1 to change the milliseconds obtained to the readable date formate */ Time time = new Time(); time.toMillis(true); time.set(timeInResult); String callDate= time.monthDay+"-"+time.month+"-"+time.year; /* Method 2 for extracting the date from tha value read from the column */ Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(time); String Month = calendar.get(Calendar.MONTH) ; /* Method 3 for extracting date from the result obtained */ Date date = new Date(timeInResult); String mont = date.getMonth() While using the Calendar method , I also tried to set the DayLight SAving Offset but it didnot worked, calendar.setTimeZone(TimeZone.getTimeZone("Europe/Paris")); int DST_OFFSET = calendar.get( Calendar.DST_OFFSET ); // DST_OFFSET Boolean isSet = calendar.getTimeZone().useDaylightTime(); if(isSet) calendar.set(Calendar.DST_OFFSET , 0); int reCheck = calendar.get(Calendar.DST_OFFSET ); But the value is not set to 0 in recheck. I am getting the wrong month value by using this also. Please some one help me where I am wrong? or is this the error in emulator ?? Thanks, Nishant Kumar Engineering Student

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• Get non-overlapping dates ranges for prices history data

  - by Anonymouse

  Hello, Let's assume that I have the following table: CREATE TABLE [dbo].[PricesHist]( [Product] varchar NOT NULL, [Price] [float] NOT NULL, [StartDate] [datetime] NOT NULL, [EndDate] [datetime] NOT NULL ) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D2C00000000 AS DateTime), CAST(0x00009D2C00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D2D00000000 AS DateTime), CAST(0x00009D2D00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 2.5, CAST(0x00009D2E00000000 AS DateTime), CAST(0x00009D2E00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3000000000 AS DateTime), CAST(0x00009D3000000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3100000000 AS DateTime), CAST(0x00009D3100000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3400000000 AS DateTime), CAST(0x00009D3400000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 2.5, CAST(0x00009D3500000000 AS DateTime), CAST(0x00009D3500000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3600000000 AS DateTime), CAST(0x00009D3600000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3700000000 AS DateTime), CAST(0x00009D3700000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3800000000 AS DateTime), CAST(0x00009D3800000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3A00000000 AS DateTime), CAST(0x00009D3A00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3B00000000 AS DateTime), CAST(0x00009D3B00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 2.5, CAST(0x00009D3C00000000 AS DateTime), CAST(0x00009D3C00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3D00000000 AS DateTime), CAST(0x00009D3D00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3E00000000 AS DateTime), CAST(0x00009D3E00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D3F00000000 AS DateTime), CAST(0x00009D3F00000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D4100000000 AS DateTime), CAST(0x00009D4100000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D4200000000 AS DateTime), CAST(0x00009D4200000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 2.5, CAST(0x00009D4300000000 AS DateTime), CAST(0x00009D4300000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D4400000000 AS DateTime), CAST(0x00009D4400000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D4500000000 AS DateTime), CAST(0x00009D4500000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D4600000000 AS DateTime), CAST(0x00009D4600000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 4.9, CAST(0x00009D4800000000 AS DateTime), CAST(0x00009D4800000000 AS DateTime)) INSERT [dbo].[PricesHist] ([Product], [Price], [StartDate], [EndDate]) VALUES (N'Apples', 2.5, CAST(0x00009D4A00000000 AS DateTime), CAST(0x00009D4A00000000 AS DateTime)) As you can see, there are two prices on that month for Apples. 4.90 and 2.50. In order to tidy this table up, I need to get this information as a date range rather than a row per day as it currently is. I can obviously do this with Min and Max aggregates easily but the ranges overlap and other business code expect non-overlapping ranges. I also tried to achieve this with self joins and row_number(), but without much success... Here is what I'm trying to achieve as the output: Product | StartDate | EndDate | Price ------------------------------------------- Apples | 01 Mar 2010 | 02 Mar 2010 | 4.90 Apples | 03 Mar 2010 | 03 Mar 2010 | 2.50 Apples | 05 Mar 2010 | 09 Mar 2010 | 4.90 Apples | 10 Mar 2010 | 10 Mar 2010 | 2.50 Apples | 11 Mar 2010 | 16 Mar 2010 | 4.90 Apples | 17 Mar 2010 | 17 Mar 2010 | 2.50 Apples | 18 Mar 2010 | 23 Mar 2010 | 4.90 Apples | 24 Mar 2010 | 24 Mar 2010 | 2.50 Apples | 25 Mar 2010 | 30 Mar 2010 | 4.90 Apples | 31 Mar 2010 | 31 Mar 2010 | 2.50 What would please be the best approach to get this done? Thanks a lot in advance,

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• Link To Work Item &ndash; Visual Studio extension to link changeset(s) to work item directly from VS history window

  - by Utkarsh Shigihalli

  Originally posted on: http://geekswithblogs.net/onlyutkarsh/archive/2014/08/11/link-to-work-item-ndash-visual-studio-extension-to-link.aspxBy linking work items and other objects, you can track related work, dependencies, and changes made over time. As the following illustration shows, specific link types are used to track specific work items and actions. (– via MSDN) While making a check-in, Visual Studio 2013 provides you a quick way to search and assign a work item via pending changes section in Team Explorer. However, if you forget to assign the work item during your check-in, things really get cumbersome as Visual Studio does not provide an easy way of assigning. For example, you usually have to open the work item and then link the changeset which involves approx. 7-8 mouse clicks. Now, you will really feel the difficulty if you have to assign work item to multiple changesets, you have to repeat the same steps again. Hence, I decided to develop a small Visual Studio extension to perform this action of linking work item to changeset bit easier. How to use the extension? First, download and install the extension from VS Gallery (Supports VS 2013 Professional and above). Once you install, you will see a new "Link To Work Item" menu item when you right click on a changeset in history window. Clicking Link To Work Item menu, will open a new dialog with which you can search for a work item. As you can see in below screenshot, this dialog displays the search result and also the type of the work item. You can also open work item from this dialog by right clicking on the work item and clicking 'Open'. Finally, clicking Save button, will actually link the work item to changeset. One feature which I think helpful, is you can select multiple changesets from history window and assign the work item to all those changesets.  To summarize the features Directly assign work items to changesets from history window Assign work item to multiple changesets Know the type of the work item before assigning. Open the work item from search results It also supports all default Visual Studio themes. Below is a small demo showcasing the working of this extension. Finally, if you like the extension, do not forget to rate and review the extension in VS Gallery. Also, do not hesitate to provide your suggestions, improvements and any issues you may encounter via github.

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• PendingIntent from notification and application history conflicts

  - by synic

  I'm creating a notification with something similar to the following: Intent ni = new Intent(this, SomeActivity.class); ni.putExtra("somestring", "somedata"); PendingIntent contentIntent = PendingIntent.getActivity(this, 0, ni, PendingIntent.FLAG_UPDATE_CURRENT|PendingIntent.FLAG_ONE_SHOT); Context context = getApplicationContext(); notification.setLatestEventInfo(context, res.getString(R.string.app_name), text, contentIntent); The key here is the extra data on the Intent for the notification. Once I click on the notification and it brings up SomeActivity, it brings up the activity and the extra data is available. However, if I exit the app, hold the home button until the recent activities list comes up, and choose to open the app again, the extra data is still passed. Is there a way I can make this data get passed only if the app is opened via the Notification, and not from the recent activities list?

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• Chrome history problem

  - by Parhs

  $("#table_exams tbody tr").click(function (event) { window.location.href="#" +$(this).attr("exam_ID"); window.location.href="/medilab/prototypes/exams/edit?examId=" + $(this).attr("exam_ID") +"&referer=" + referer; row_select(this); }); $(document).keypress(function (event) { if(event.keyCode==13) $(row_selected).trigger("click"); }); I have a little problem with this only in chrome...When user goes back chrome ignores the last href hash that my script added..but when i do a doubleclick its ok... IE and Firefox work great...

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• Migrate SVN repository from Google code to another repository server (keeping history)

  - by Marco Demaio

  I read some question/answers here about how to do it using svnadmin/dump etc. Actually I did not understand properly what I'm supposed to do. http://stackoverflow.com/questions/939963/how-to-migrate-svn-to-another-repository I think I have to do some sort of dump from the Google code repository using svnadmin, but where do I get this svnadmin? I use TortoiseSVN 1.6.3 on WXP and there is no svnadmin.exe command in all my C folder, where am I supposed to download these applications? Thanks!

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• Recover history from foolish git-svn merge

  - by Gregg Lind

  the players: master: the svn branch (actual, not local trackign) mybranch: a local branch My mistake: [master] git svn rebase [master] git merge mybranch [master] git svn dcommit I did this twice. Is there a way I can remedy all this? I was thinking something like: git checkout --hard [commit before the merging] git dcommit # that to the svn? git rebase mybranch git dcommit But this doesn't seem to work. (I know I should a. working from a local tracking branch and b. have rebased rather than merged) I'm in the frantic / willing to send beer to respondents stage :)

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• App Install History on Android

  - by KFB

  Does anyone know if there's a way to access past app installs via the sdk? I want to be able to get a list of all the apps users have downloaded from the Market.

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• What are the programming religious wars of the generations before our current generation?

  - by Christopher Altman

  Being 32 years old, I did not follow debates in programming, language design, and platforms in the 1960s, 1970s, 1980s, and most of the 1990s. I sometimes hear glimpse of what the major debates were and how they turned the course of history. It makes me wonder what I take for granted. I am curious, what were the debates. The ones I know are: Procedural vs. Object Orientated Programming Lisp vs. C Software vs. Chips with Embedded Code

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• Mercurial Remove History

  - by Jake Pearson

  Is there a way in mercurial to remove old changesets from a database? I have a repository that is 60GB and that makes it pretty painful to do a clone. I would like to trim off everything before a certain date and put the huge database away to collect dust.

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• Redoing Commit History in GIT Without Rebase

  - by yar

  Since asking my last question which turned out to be about rebasing with GIT, I have decided that I don't want to rebase at all. Instead I want to: Branch Work work work, checking in and pushing at all times Throw out all of those commits and pretend they never happened (so one clean commit at the end of work) I do this currently by copying the files to a new directory and then copying them back in to a new branch (branched at the same point as my working branch), and then merging that into master or wherever. Is this just plain bad and why? More important: Is there a better/GIT way to do this? git rebase -i forces me to merge (and pick, and squash).

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• Creating a broswed history menu

  - by pundit

  Hi guys, I'm sure many of you have visited amazon.com. When you do, amazon create a list of browsed menu items at the very bottom of the home page. I am currently doing a project that applies personalisation and customisation and wanted to implement something similar. my prototype is based on an institution, so i want to display a list of probably the last 5 viewed programmes or courses on the home page. I am using php and so far i have thought of using $_SERVER["HTTP_REFERER"], but basically returns the last url..Which is not what i want. Does any one have any suggestions that could probably help with this. thanks.

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• Creating a browsed history menu

  - by pundit

  Hi guys, I'm sure many of you have visited amazon.com. When you do, amazon creates a list of browsed menu items at the very bottom of the home page. I am currently doing a project that applies personalisation and customisation and wanted to implement something similar. My prototype is based on an institution, so I want to display a list of, say, the last 5 viewed programmes or courses on the home page. I am using PHP and so far i have thought of using $_SERVER["HTTP_REFERER"], but this returns only the last URL, which is not what I want. Does anyone have any suggestions to help me with this? Thanks.

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• nicely display file rename history in git log

  - by Jian

  The git command git log --format='%H' --follow -- foo.txt will give you the series of commits that touch foo.txt, following it across renames. I'm wondering if there's a git log command that will also print the corresponding historical file name beside each commit. It would be something like this, where we can interpret '%F' to be the (actually non-existent) placeholder for filename. git log --format='%H %F' --follow -- foo.txt I know this could be accomplished with git log --format='%H' --follow --numstat -- foo.txt but the output is not ideal since it requires some non-trivial parsing; each commit is strewn across multiple lines, and you'll still need to parse the file rename syntax ("bar.txt => foo.txt") to find what you're looking for.

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• Getting Gowalla Check-in history using API

  - by Bruack

  I have been playing around with the Gowalla API, and was wondering if anyone has found a way to get a list of all recent checkins (just your own, not including friends). The documentation is quite awful.

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• overview/history of resident memory usage

  - by kapet

  I have a fairly complicated program (Python with SWIG'ed C++ code, long running server) that shows a constantly growing resident memory usage. I've been digging with the usual tools for the leak (valgrind, Pythons gc module, etc.) but to no avail so far. I'm a bit afraid that the actual problem is memory fragmentation within Python and/or libc managed memory. Anyway, my question is more specific right now: Is there a tool to visualize resident memory usage and ideally show how it develops over time? I think the raw data is in /proc/$PID/smaps but I was hoping there's some tool that shows me a nice graph of the amounts used by mmap'ed files vs. anonymous mmap'ed memory vs. heap over time so that it's easier to see (literally) what's changing. I couldn't find anything though. Does anybody know of a ready to use tool that graphs memory usage over space and time in an intuitive way?

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• Trimming GIT Checkins/Squashing GIT History

  - by yar

  I check my code into a GIT branch every few minutes or so, and the comments end up being things like "Everything broken starting again" and other absurdities. Then every few minutes/hours/days I do a serious checkin with a real comment like, "Fixed bug #22.55, 3rd time." How can I separate these two concepts? I would like to be able to remove all my frequent-checkins and just leave the serious ones.

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