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• [mysql] diff between tables

  - by www.yegorov-p.ru

  I have two tables, with the same structure, for example: table "first' with columns 'a','b','c' and table 'second' with the same columns. How to find difference betweet those two tables? Of course, I can make some script on python, that will make set(a)-set(b), but I think there is some way to do it in mysql.

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• Why does Chrome not start correctly when using C# Process.Start?

  - by nbolton

  I'm able to start Chrome successfully using this C# code: Process.Start("chrome", "http://www.google.co.uk"); However, it does two things wrong: It does not navigate to the URL specified in arguments It does not re-use the existing Chrome window (it opens a new one) I've tried using ProcessStartInfo and setting UseShellExecute and LoadUserProfile just in case these did something, but this makes no difference. Any ideas?

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• Hibernate orm for a view

  - by EugeneP

  How do you ORM a view? Is there any difference with a table in terms of reverse engineering? In my case, I have a whole pile of joined tables that will be read-only in an application. So, if I need sort of a 1 Object with all collections in proper order, instead of long chains of relationships - collection with another etc, it'll be simpler. What do you think and how do you accomplish this?

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• Why DB constraints are not added during table creation.

  - by Pratik

  Hi All, What is the difference between these to ways of table creation. CREATE TABLE TABLENAME( field1.... field2... add constraint constraint1; add constraint constraint2; ) AND CREATE TABLE TABLENAME( field1.... field2... ) ALTER TABLE TABLENAME add constaint1 ALTER TABLE TABLENAME add constaint2 Moreover the first scripts fails on the SQL+ but they pass on sqldeveloper Thanks! Pratik

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• .NET threading question

  - by MusiGenesis

  Is there any essential difference between this code: ThreadStart starter = new ThreadStart(SomeMethod); starter.Invoke(); and this? ThreadStart starter = new ThreadStart(SomeMethod); Thread th = new Thread(starter); th.Start(); Or does the first invoke the method on the current thread while the second invokes it on a new thread?

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• delete a single array of object

  - by hitech

  I am not sure if both is these works to delete? p = new int[1]; delete p and delete [] p; if both works what is the difference between above two delete?

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• The intersection of two sorted arrays.

  - by user288609

  Given two sorted arrays: A and B. The size of array A is La and the size of array B is Lb. How to find the intersection of A and B? If La is much bigger than Lb, then will there be any difference for the intersection finding algorithm?

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• BlackBerry - What does getPreferredWidth() and getPreferredHeight() return??

  - by tek3

  Hi all, I am not getting clear about the concept of getPreferredWidth() and getPreferredHeight() methods. What do they return means on what what basis the values are returned.?? What is difference between getWidth() and getPreferredWidth()??? Thank you..

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• What is the relationship between delegate, proxy and adapter patterns?

  - by Siegfried

  What is the relationship between delegate, proxy and adapter patterns? It seems they are all similar in terms of doing something on behalf of another object. Can anyone summarize the relationship and difference between these 3 patterns? Thanks!

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• How slow is Python's string concatenation vs. str.join?

  - by Wayne Werner

  As a result of the comments in my answer on this thread, I wanted to know what the speed difference is between the += operator and ''.join() So what is the speed comparison between the two?

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• c#: what is the point in having a purely public property

  - by Craig Johnston

  What is the point in having a property inside a class that simply get and sets a member variable? What practical difference would be there to just making the variable public?

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• jQuery and function scope

  - by Jason

  Is this: ($.fn.myFunc = function() { var Dennis = function() { /*code */ } $('#Element').click(Dennis); })(); equivalent to: ($.fn.myFunc = function() { $('#Element').click(function() { /*code */ }); })(); If not, can someone please explain the difference, and suggest the better route to take for both performance, function reuse and clarity of reading. Thanks!

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• intellij icon over project files

  - by shaunhare.co.uk

  intellij has placed what look like no entry signs over my java files (red circles with a line through) searched around but cannot find why? Would anyone know please. It's a maven project if that makes a difference

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• Sending SMS WMA way Vs Datagram COnnection in Blackberry

  - by Sudhakar Chavali

  Hello All, As blackberry supports both API, I would like to know which option I need to go for. What is the difference between two options? Which option is more reliable in both CDMA and GSM devices? Thanks Sudhakar Chavali

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• System call Vs Function call

  - by Ankur

  What is the difference between system call and function call. Is fopen a system call or function call.

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• KEY_ENTER vs '\n'?

  - by wrongusername

  When I'm using PDcurses and I try to have a while loop exit when the enter key is pressed with while(key != KEY_ENTER), the while loop never exits. However, when I try to have the same loop exit with while((char)key != '\n'), it exits successfully whenever I pressed enter. What's the difference?

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• Why subtract null pointer in offsetof()?

  - by Bruce Christensen

  Linux's stddef.h defines offsetof() as: #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) whereas the Wikipedia article on offsetof() (http://en.wikipedia.org/wiki/Offsetof) defines it as: #define offsetof(st, m) \ ((size_t) ( (char *)&((st *)(0))->m - (char *)0 )) Why subtract (char *)0 in the Wikipedia version? Is there any case where that would actually make a difference?

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• Ctrl-Backspace Visual Studio 2010

  - by Chris Watts

  I recently upgraded to Visual Studio 2010 and found out that when i press Ctrl-Backspace on a empty line it will delete the line, which is what it did in 2008, but then it will also delete the last character on the line above. I have tried to see if there is any settings anywhere but i cant seem to find any. Does anyone know if you can change this or did they make it default in 2010 Im using C#, if that makes a difference.

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• Add and Subtract 128 Bit Integers in C(++)

  - by Billy ONeal

  Hello :) I'm writing a compressor for a long stream of 128 bit numbers. I would like to store the numbers as differences -- storing only the difference between the numbers rather than the numbers themselves because I can pack the differences in fewer bytes because they are smaller. However, for compression then I need to subtract these 128 bit values, and for decompression I need to add these values. Maximum integer size for my compiler is 64 bits wide. Anyone have any ideas for doing this efficiently? Billy3

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• Percentage value with GNU Diff

  - by cdated

  What is a good method for using diff to show a percentage difference between two files? Such as if a file has 100 lines and a copy has 15 lines that have been changed the diff-percent would be 15%.

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• Are column families within a single keyspace related in any way?

  - by taw

  What's the difference between having keyspace Foo and column families A and B in it vs. having two keyspaces FooA and FooB with one column family in each? API make it look as if these two were pretty much equivalent. As a bonus question, how do supercolumns fit into this picture?

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• Must I Install a Gem to Unpack It?

  - by yar

  I wrote up some instructions for freezing a non-native gem in a Rails app today: install the gem sudo gem install fastercsv put the reference in the environment.rb (I think this is only necessary to do unpack with no GEM specified) config.gem "fastercsv" unpack the gem rake gems:unpack GEM=fastercsv uninstall the gem sudo gem uninstall fastercsv I know this must be the long way around: how can I unpack the gem without installing it first? Also: What's the difference between rake gems:unpack GEM=fastercsv and gem unpack fastercsv?

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• pure as3 benefits to compiling with flex4 instead of flex3?

  - by jedierikb

  If I have a pure as3 project that I have been compiling with flex3 from mxmlc, is there any reason to switch to using the mxmlc with flex4? I can use all of the flash 10 language features like Vector, 3D, etc., so that is not a reason to switch (or is there something I can't do?). But maybe there is a performance boost? Or is the exact same compiling tool and the flex code base is the only difference?

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• Android Notification Bar Number

  - by JonF

  I've been able to successfully display the notification number count on the Android emulator. However, it doesn't display anything when I use it on an actual Android phone. Any suggestions on why there might be a difference?

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• Are there any generic shipping calculators out there for DJango?

  - by Jon Cage

  I'm in the process of settings up a website (I'm using DJango) to begin selling some toys I build and need a way of calculating shipping costs for my customers. Are there any (preferably free) shipping calculators which accept a customers address and return the cost for different delivery companies / delivery options? It would be nice if the API could indicate cost vs delivery time. We'll be shipping world-wide if that makes a difference?

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