At the moment I try to debug the class java.awt.Component. If I try to inspect a computed local variable (by typing Shift+Ctrl+I) I get the following message:    But the variable must be initialised at the moment!  Do you now that issue? Can you help me?  Thanks!!
Sometimes when I am debugging code in Eclipse it happens that although I can see and inspect class member variables without any difficulty I am unable to inspect the values of variables declared locally within functions. As an aside, any parameters to the current function lose their 'real' names and instead one sees their values listed in the Variables window as arg0, arg1, arg2, etc but at least the values are visible.  This is occurring at present in relation to classes defined within the core JDK. I have verified that the installed and current JRE is a JDK.  Is anybody able to shed some light on this behaviour?
Why don't all Jedi stick around as force ghosts? In many of the Star Wars movies, Jedi come back as Force ghosts.    Why don't they stick around forever, giving advice to new generations, as well as countless knowledge from thousands of years? In an older question from June 2011, , apparently revived by the system, a user is asking about the origin of the rotation of celestial bodies.  The  (with 17 votes) states the following:     When things collapse under their own gravity in space (i.e. clouds of gas and dust), any small amount of asymmetry in the collapse will be enough start it spinning.   And then it goes on saying:     Even if it spins by a tiny amount, as it collapses, angular momentum     conservation will mean it spins more and more quickly.   Is all this really correct?  I could try to ask in a comment to the answer. I actually did. But the author is no longer registered.  Hence I am asking it as a question.  But that is not the end of the story. As I was about to ask my question, I looked for other relevant questions, and there are some. I did not make an exaustive survey, but I did not find one that had satisfactory answers:    (december 2011) has just one accepted answer (0 votes) stating essentially that the solar system has angular momentum because it started from a cloud that had angular momentum. No comment.  (july 2011) is questionning about everything from galaxies to electrons. The answers are of a much higher quality, but while they seem to justify the possiblility of spin and angular momentum (and its conservation), there are not clear on how it appears, at least for celestial bodies.  (june 2013): That was my own very naive first question on this site. It is related but does not directly address spin.   One answer I found is that momentum appear from bodies in relative motion past each other. Nice, but not really an answer: where did they get their relative speed to begin with. Unfortunately the answer is: from the angular momentum of larger structures they belong to (well, it can be more comples). So this is just chicken and egg explanation. But how did it get started?  Note that my question is not a duplicate, since it is primarily whether the above statements are correct, which is not considered in these other questions.  Furthermore, these questions are fairly old, and given that none had received answers that seem to answer the question of the origine of existence of celestial angular momentum (not in a way I can understand anyway), it may be appropriate to attempt restarting the process, with the above discussion to motivate that an answer should explain the physical mechanism that started the existence of spin of celestial bodies. notation of distribution I have a question:      Does  $$N(0, x)$$ mean a normal distribution with mean $0$ and variance $x$? Or standard deviation $x$?   The notation seems ambiguous sometimes. Should we add more badges for asking questions? This proposal was superseded , which improves on the core concept.   Early on, there was a question about whether Stack Overflow should . At the time,  was:  Getting answers is reward enough for asking questions.  Even then, Stack Overflow was getting more than enough questions, so it didn't make much sense to incentivize more questions.  lists the badges that can be earned by asking quality questions. (There are at least 8). But looking at the list of recent , it looks more like a list of . These badges are difficult to come by in the first place, and they're much harder to earn on sites like  even though there are some  on that site. It turns out that . We , but we still need plenty of oysters. The Student bronze badge is awarded for the first upvoted1 question. There are no equivalent gold or silver badges. Therefore, I'd like to propose the following:  Student—Asked first question with score of 1 or more Sophomore—Asked 10 questions with score of 1 or more Socrates—Asked 50 questions with score of 1 or more  Do you have any suggestions of better names/levels?  To give you an idea of how many of these badges would be awarded, I wrote . The results2 for the original trilogy: users   gold silver bronze none    Site Name  ------- ---- ------ ------ ------- ---------  3000344 7127 67713  805778 2194566 Stack Overflow 235053  115  1698   53073  181980  Super User 156773  53   1191   40063  116710  Server Fault  The gold version on SO would be slightly more rare than  and more common than . Obviously, there would be fewer badges for smaller sites: 5545    1    18     917    4628    Philosophy 4032    4    41     802    3230    History  5663    3    28     917    4746    Parenting   Several older sites would get none at all: 5778    null 29     1063   4715    Quantitative Finance 7884    null 20     927    6957    Project Management 4333    null 17     1630   2703    Motor Vehicle Maintenance and Repair  These smaller sites get at most . I suspect that a gold or silver badge would encourage site regulars to increase that number without sacrificing quality. Certainly the requirement for those questions to stay in positive territory would prevent a person from flooding the site3 with terrible questions in order to get the badge.   1. The [original spec](https://blog.stackoverflow.com/2008/07/stack-overflow-badge-feedbac/) didn't consider voting at all for Student and Teacher.   2. Your results will vary from mine since I'm looking at slightly newer data. The bronze badge count also differs from the number of [Student](https://stackoverflow.com/help/badges/2/student) badges because the badge isn't revoked when a user's question is later downvoted or deleted.   3. There is a potential problem with cookie-cutter or variation-on-a-theme questions. However, I think the typical tools for closing and deleting questions will prevent people from gaming the system for these badges. Editing old questions Why do cars gain lift while going at a high speed? I've been researching the physics involved with spoilers and I've just been turning up the same information about spoilers giving the back wheels of a car more traction by acting as an up side down airfoil.   So my question is, what exactly causes the car to apparently gain lift while moving quickly, so as to merit the use of a spoiler, and is this entirely due to the aerodynamics of the vehicle in question?   Edit: Clarity of question. "Do you know where's Linda?" vs "Do you know where Linda is?" I have been using the default Ubuntu 11.10 with Unity for some time now and decided to start customizing it.  I have already been able to make some changes with the gnome-tweak-tool. However, there are many themes that I get from gnome-look.org that don't appear in the gnome-tweak-tool even after putting them in the /usr/share/themes folder.  Any idea why this is happening? Thanks. Will I lose previous purchases when I change country in iTunes I lived in country A for a few years, and made a number of purchases on the iTunes store for that country. I have now moved to country B, and want to start using the iTunes store from country B. If I change the country in my account settings, will I lose all my previous purchases, or will I still be able to re-download my purchases from country A from iCloud? Are the hoses in toilets in Asia something I should know about? I have noticed random bits of hose without proper fittings before I think for example in India and just assumed they are for use by the cleaners or for filling the water jug in .  But Now I'm travelling in Malaysia and Singapore and there are more western toilets than squat toilets in the places I've been yet proper hoses with proper fittings are very common in toilets:  (Hose next to a Western style toilet in my hostel in Chinatown, Kuala Lumpur.)  At one place in Singapore there were even signs on each cubicle door stating whether it contained a western or squat toilet, but also whether there was a hose! (I didn't take a photo of the sign, unfortunately)  This makes me think there is a use for the hose for clients, not just cleaners. But for what purpose? Should I know how to use it as a tourist? Please tell me it's not a kind of alternative to a bidet!  Possibly related is the fact that many toilet floors are awash with water. This can be a big problem if you're not wearing waterproof shoes or have to lower your trousers and keep them dry. Other than this toilets are pretty clean and I've seen both the hoses and the wetness in what I would regard as somewhat "fancy" places. PS1='$(pwd)' why this works and why is this different from PS1=$(pwd) Why when I enter this command the prompt changes to my directory?  PS1='$(pwd)'   I am using single quotes, which means no interpolation , a.k.a echo '$(pwd)' ——→ $(pwd)  Furthermore, say that we clarified why this works... why is it functioning differently from PS1=$(pwd) ? (no quotes at all)  By different I mean that if I use the quotes then the prompt will keep changing to my current directory as I navigate through the terminal. But if I don't use quotes, then the prompt will always remain the directory that I was in when I first entered the command PS1=$(pwd)  why? Excel macro to highlight all cells that match value in current cell I'm downloading some images from a service that doesn't always include a content-type and doesn't provide an extension for the file I'm downloading (ugh, don't ask).  What's the best way to determine the image format in .NET?  The application that is reading these downloaded images needs to have a proper file extension or all hell breaks loose. Punctuations with relative pronouns Sogou is a Chinese search engine, which can search text, images, music and maps.  Is a comma required before "which" in the above sentence? The output from uname:  root@debian:~ # uname -a Linux 5asnb 2.6.32-5-amd64 #1 SMP Mon Jun 13 05:49:32 UTC 2011 x86_64 GNU/Linux   However the /sbin/init executable shows up as 32-bit:  root@debian:~ # file /sbin/init /sbin/init: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, stripped   Other aspects of the system seem to contradict things as well:  root@debian:~ # echo $HOSTTYPE i486  root@debian:~ # getconf LONG_BIT 32 In a  about formatting a double[][] to CSV format,  that using StringBuilder would be faster than String.Join. Is this true? How to prove that exponential grows faster than polynomial? In other words, how to prove:  For all real constants $a$ and $b$ such that $a &gt; 1$, $$\lim_{n\to\infty}\frac{n^b}{a^n} = 0$$  I know the definition of limit but I feel that it's not enough to prove this theorem. Controversy over subject-verb agreement in this sentence The sentence     Women driving cars is, of course, such a foreign sight to a society like   Saudi Arabia   The subject is not "women" (otherwise, the verb would have been 'are'); the subject, as I mean to use it, is the rarity of seeing women driving cars. The subject, in other words, is "women driving cars" as a thing. Does this give me licence to use 'is' here? Thank you. Change Proxy Settings In Ubuntu I want to use the Ubuntu Software Center to install software, but I cannot download them.  How can I give my proxy settings in Ubuntu terminal (just like we use cmd in Windows to choose IE proxy settings)? $X/{\sim}$ is Hausdorff if and only if $\sim$ is closed in $X \times X$