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Search found 311 results on 13 pages for 'jimmie lin'.

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• In SQL, can we always write an inner join statement as a main query and subquery?

  - by Jian Lin

  In SQL, can we always write an inner join statement as a main query and subquery? For example, select * from gifts g where g.giftID in (select giftID from sentGifts); can do a join and show the gifts sent in the sentGifts table, but it won't be able to show the sentTime because that is inside the subquery?

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• In Ruby on Rails, the :id is only optional in routes.rb? How to tell optional vs not optional?

  - by Jian Lin

  In routes.rb map.connect ':controller/:action/:id' map.connect ':controller/:action/:id.:format' but then http://localhost:3000/foobars/alt will work too. The params are: {"action"=>"alt", "controller"=>"foobars"} so looks like :id is optional here. How can you tell it is optional vs not optional? Can you make it so that it is not optional in routes.rb?

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• Using sass, how do you style "#div1 img, #div2 img { height: 80px }" ?

  - by Jian Lin

  Using .sass, how do you style #box1 img, #anotherbox img { height: 80px } ? Is using mixins the only way?

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• In Mercurial, what is the command to say "make all my files as of 2 months ago! (Revision 328)" or "

  - by Jian Lin

  In Mercurial, what is the command to say 1) make all my files as of two months ago (say, April 16, 6:03pm) (Revision 328 as seen from the hg log) 2) or, make my files back to the most current repository version?

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• In SQL, why is "select *, count(*) from sentGifts group by whenSent;" ok, but when "*" and "count(*)

  - by Jian Lin

  In SQL, using the table: mysql> select * from sentGifts; +--------+------------+--------+------+---------------------+--------+ | sentID | whenSent | fromID | toID | trytryWhen | giftID | +--------+------------+--------+------+---------------------+--------+ | 1 | 2010-04-24 | 123 | 456 | 2010-04-24 01:52:20 | 100 | | 2 | 2010-04-24 | 123 | 4568 | 2010-04-24 01:56:04 | 100 | | 3 | 2010-04-24 | 123 | NULL | NULL | 1 | | 4 | 2010-04-24 | NULL | 111 | 2010-04-24 03:10:42 | 2 | | 5 | 2010-03-03 | 11 | 22 | 2010-03-03 00:00:00 | 6 | | 6 | 2010-04-24 | 11 | 222 | 2010-04-24 03:54:49 | 6 | | 7 | 2010-04-24 | 1 | 2 | 2010-04-24 03:58:45 | 6 | +--------+------------+--------+------+---------------------+--------+ 7 rows in set (0.00 sec) The following is OK: mysql> select *, count(*) from sentGifts group by whenSent; +--------+------------+--------+------+---------------------+--------+----------+ | sentID | whenSent | fromID | toID | trytryWhen | giftID | count(*) | +--------+------------+--------+------+---------------------+--------+----------+ | 5 | 2010-03-03 | 11 | 22 | 2010-03-03 00:00:00 | 6 | 1 | | 1 | 2010-04-24 | 123 | 456 | 2010-04-24 01:52:20 | 100 | 6 | +--------+------------+--------+------+---------------------+--------+----------+ 2 rows in set (0.00 sec) But suppose we want the count(*) to appear as the first column: mysql> select count(*), * from sentGifts group by whenSent; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '* from sentGifts group by whenSent' at line 1 it gave an error. Why is it so and what is a way to fix it? I realized that this is ok: mysql> select count(*), whenSent from sentGifts group by whenSent; +----------+------------+ | count(*) | whenSent | +----------+------------+ | 1 | 2010-03-03 | | 6 | 2010-04-24 | +----------+------------+ 2 rows in set (0.00 sec) but what about the one above that gave an error? thanks.

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• why assert_equal() in Ruby on Rails sometimes seem to compare by Identity and sometimes by value?

  - by Jian Lin

  it was very weird that yesterday, I was do an integration test in Rails and assert_equal array_of_obj1, array_of_obj2 # obj1 from db, obj2 created in test and it failed. The values shown inside the array and objects were identical. If I change the test to assert array_of_obj1 == array_of_obj2 Then it will pass. But today, the first test actually passed. What reason could it be? Is assert_equal always using == or .equal? in Rails 2.2 or 2.3.5?

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• In Ruby, how to write a method to display any object's instance variable names and its values

  - by Jian Lin

  Given any object in Ruby (on Rails), how can I write a method so that it will display that object's instance variable names and its values, like this: @x: 1 @y: 2 @link_to_point: #<Point:0x10031b298 @y=20, @x=38> I also want to be able to print <br> to the end of each instance variable's value so as to print them out nicely on a webpage. the difficulty now seems to be that not every instance variable has an accessor, so it can't be called with obj.send(var_name) (the var_name has the "@" removed, so "@x" becomes "x")

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• In Mercurial (hg), how do you see a list of files that will be pushed if an "hg push" is issued?

  - by Jian Lin

  We can see all the changesets and the files involved using hg outgoing -v but the filenames are all scattered in the list of changesets. Is there a way to just see a list of all the files that will go out if hg push is issued?

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• Is there a way to use a Ruby loop inside of HAML's :javascript region?

  - by Jian Lin

  Inside of HAML, can we have a loop inside the :javascript region? This will work: - 10.upto(20) do |i| :javascript document.getElementById('aDiv').innerHTML += '#{i}'; and this will not: :javascript - 10.upto(20) do |i| document.getElementById('aDiv').innerHTML += '#{i}'; can the code above also be made to work as well?

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• If the "with" statement in Javascript creates a new scope, why does the following code not work as e

  - by Jian Lin

  If the "with" statement in Javascript creates a new scope, shouldn't clicking on the links show a different x which are in different scopes? It doesn't. <a href="#" id="link1">ha link 1</a> <a href="#" id="link2">ha link 2</a> <a href="#" id="link3">ha link 3</a> <a href="#" id="link4">ha link 4</a> <a href="#" id="link5">ha link 5</a> <script type="text/javascript"> for (i = 1; i <= 5; i++) { with({foo:"bar"}) { var x = i; document.getElementById('link' + i).onclick = function() { alert(x); return false; } } } </script>

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• In Javascript, when is a new scope created? (with a new function and in a "with" statement) Are the

  - by Jian Lin

  In Javascript, when is a new scope created? The 2 situations I know of are: with a new function in a "with" statement as a note, any new block (in if-then-else, loops, or just beginning a block for no other reason) won't create a new scope. Is there a third situation where a new scope is created besides the two situations above? Thanks.

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• how big is the performance impact of using system('hostname') in PHP?

  - by Jian Lin

  I saw some existing code in the PHP scripts doing a system('hostname'); how big can the performance impact on the server be if using this method?

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• Is there advantage of using in CSS #image-box vs #image_box (hyphen vs underscore)?

  - by Jian Lin

  Or is it just mainly a personal preference? As a programmer I always use underscore, but have seen it as - and so I will have to conform to it working in that project.

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• What are the best methods to "Clear the 6th bit" of an integer?

  - by Jian Lin

  What are the best methods to "Clear the 6th bit" of an integer? And, is your solution platform independent? (32 or 64 bit integer, etc). If not, can you give a solution that is platform independent?

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• In Ruby, why does inspect() print out some kind of object id which is different from what object_id(

  - by Jian Lin

  When the p function is used to print out an object, it may give an ID, and it is different from what object_id() gives. What is the reason for the different numbers? >> a = Point.new => #<Point:0x4684abc> >> a.object_id => 36971870 >> a.__id__ => 36971870 >> "%X" % a.object_id => "234255E"

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• Using Git or Mercurial, how would you know when you do a clone or a pull, no one is checking in file

  - by Jian Lin

  Using Git or Mercurial, how would you know when you do a clone or a pull, no one is checking in files (pushing it)? It can be important that: 1) You never know it is in an inconsistent state, so you try for 2 hours trying to debug the code for what's wrong. 2) With all the framework code -- potentially hundreds of files -- if some files are inconsistent with the other, can't the rake db:migrate or script/generate controller cause some damage or inconsistencies to the code base?

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• In Javascript, if there is an object with a lot of properties that are functions, how do you convert

  - by Jian Lin

  In Javascript, if an object has lots of properties that are functions: var obj = { foo: function() { ... }, bar: function() { ... }, ... } then how can you get an array of names of those functions? That is, an array ["foo", "bar", ... ] thanks.

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• La Playstation 3 de Sony ne supportera plus Linux ou les autres systèmes d'exploitation

  La Playstation 3 de Sony ne supportera plus Linux ou les autres systèmes d'exploitation Après le bug de l'an 2010, Sony fait encore parler de lui avec une nouveauté sur la PS3. Sony vient d'annoncer que le firmware version 3.21 enlévera la possibilité d'installer d'autres systèmes d'exploitation. La raison de la firme japonaise est d'enlever un risque de sécurité à leur console fétiche. Par contre, pour beaucoup, la PS3 est une solution peu chère pour avoir un lecteur Blu-ray mais aussi d'avoir le processeur Cell (d'IBM) à disposition. Du coup, la solution logique était d'installer Lin...

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• Google I/O 2010 - BigQuery and Prediction APIs

  Google I/O 2010 - BigQuery and Prediction APIs Google I/O 2010 - BigQuery and Prediction APIs App Engine 101 Amit Agarwal, Max Lin, Gideon Mann, Siddartha Naidu Google relies heavily on data analysis and has developed many tools to understand large datasets. Two of these tools are now available on a limited sign-up basis to developers: (1) BigQuery: interactive analysis of very large data sets and (2) Prediction API: make informed predictions from your data. We will demonstrate their use and give instructions on how to get access. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 6 0 ratings Time: 57:48 More in Science & Technology

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• Headset undetected when plugged in

  - by tough

  I have recently installed Ubuntu 12.04 in my machine which was running windows 7. I have been trying to configure the audio to work exactly as it used to work in Windows but never been able to do so. I have followed this link exactly. I am still not getting the required configuration. aslamixer command shows me with 5 adjustable controls as shown below Master "adjustable" Speaker "adjustable" PCM "adjustable" Front "adjustable" AND Beep "adjustable" Mic Jack Mic In or Lin In S/PDIF OO "in a box" S/PDIF D OO "in a box" S/PDIF P DIGITAL or Analog M It does not detect the headset jack when plugged in. I here mean to say that the sound form the speakers does not go off when I plug in my headset jack. How can I make this working. Some other googling also did not help. I am on Hp Pavilion DV7 machine. The chip is IDT 92HD75B3X5 and the card is HDA ATI SB.

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• permission denied errors while starting namenode in hadoop 2.2.0

  - by Riddle

  I recently installed hadoop2.2.0 on my desktop running : Linux livingstream 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Lin I am able to format the namenode just fine , however when I start the namenode using the following command: hadoop-daemon.sh start namenode I get the following permission errors , can anyone please help me with these errors: hduser@livingstream:/usr/local/hadoop$ hadoop-daemon.sh start namenode mkdir: cannot create directory `/var/run/hadoop': Permission denied starting namenode, logging to /var/log/hadoop/hduser/hadoop-hduser-namenode- livingstream.out /usr/sbin/hadoop-daemon.sh: line 138: /var/run/hadoop/hadoop-hduser-namenode.pid: No such file or directory Can you please help me with these errors. Best Regards, Ishan

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• How do I install Gyachi on PPC Ubuntu 12.04.1?

  - by Sergiu

  So I'm trying to install Gyachi on my iMac G5 runnig Ubuntu 12.04.1 but I can't seem to find a package that works on powerpc interface. I did find some powerpc enterprise Linux.rpm builds on the internet but I have no idea how to install them. This is the lin: http://rpmfind.net/linux/RPM/epel/5/ppc/gyachi-1.1.71-5.el5.ppc.html Does anyone know how to install that, or would it work? Is there any Skype alternative that has both audio and video for Ubuntu? In my knowledge, Gyachi is the only one that at least does both audio and video for Yahoo.

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• Management Software in Java for Networked Bus Systems

  - by Geertjan

  Telemotive AG develops complex networked bus systems such as Ethernet, MOST, CAN, FlexRay, LIN and Bluetooth as well as in-house product developments in infotainment, entertainment, and telematics related to driver assistance, connectivity, diagnosis, and e-mobility. Devices such as those developed by Telemotive typically come with management software, so that the device can be configured. (Just like an internet router comes with management software too.) The blue AdmiraL is a development and analysis device for the APIX (Automotive Pixel Link) technology. Here is its management tool: The blue PiraT is an optimised multi-data logger, developed by Telemotive specifically for the automotive industry. With the blue PiraT the communication of bus systems and control units are monitored and relevant data can be recorded very precisely. And here is how the tool is managed: Both applications are created in Java and, as clearly indicated in many ways in the screenshots above, are based on the NetBeans Platform. More details can be found on the Telemotive site.

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• How to pronounce LINQ

  - by CMinus

  I've always pronounce it like "link", but I also heard people pronounce it "Lin-Q". I am really curious whcih one is correct.

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• question about string.format().

  - by Mike

  how string.format() can help to avoid using "+" in such statemet: string statement =" SELECT DISTINCT titel as linieName" + " FROM qry_Forecast_Taktzeiten" + " WHERE linieName LIKE 'lin%';";

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