rule of three - Page 299

Sorting MySQL results within a resultset

- by InnateDev

I have a resultset of lets say 10 results. 3 of them have a type 'Pears', and the next 3 have a type 'Apples' and the next three have a type of 'Bananas'. The last record has a type of 'Squeezing Equipment' - unrelated to the fruits. How do I return this set of results (for pagination too) in a GROUPED order that I specify WITHOUT using any inherent sort factor like ALPHABETA or ID etc? I have the all types at my disposal before running the code so they can be specified. i.e. ID | Bananas ID | Bananas ID | Bananas ID | Apples ID | Apples ID | Apples ID | Pears ID | Pears ID | Pears ID | Squeezing Equipment

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Web service reference location?

- by Damien Dennehy

I have a Visual Studio 2008 solution that's currently consisting of three projects: A DataFactory project for Business Logic/Data Access. A Web project consisting of the actual user interface, pages, controls, etc. A Web.Core project consisting of utility classes, etc. The application requires consuming a web service. Normally I'd add the service reference to the Web project, but I'm not sure if this is best practice or not. The following options are open to me: Add the reference to the Web project. Add the reference to the Web.Core project, and create a wrapper method that Web will call to consume the web service. Add a new project called Web.Services, and copy step 2. This project is expected to increase in size so I'm open to any suggestions.

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Parallelism in Python

- by fmark

What are the options for achieving parallelism in Python? I want to perform a bunch of CPU bound calculations over some very large rasters, and would like to parallelise them. Coming from a C background, I am familiar with three approaches to parallelism: Message passing processes, possibly distributed across a cluster, e.g. MPI. Explicit shared memory parallelism, either using pthreads or fork(), pipe(), et. al Implicit shared memory parallelism, using OpenMP. Deciding on an approach to use is an exercise in trade-offs. In Python, what approaches are available and what are their characteristics? Is there a clusterable MPI clone? What are the preferred ways of achieving shared memory parallelism? I have heard reference to problems with the GIL, as well as references to tasklets. In short, what do I need to know about the different parallelization strategies in Python before choosing between them?

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Question regarding the ExtJS License

- by stephemurdoch

Let's say I create a CMS that uses ExtJS. I want to avoid the license fee, so I open-source the CMS on github. Now let's imagine that I make your friend Dave a website that uses my CMS. I spend three hundred hours designing a logo and designing the layout. Can I charge a fee for this, and would I be obliged to open-source Dave's website too or is it enough to just open-source the CMS? I find this LPGL license a little confusing. Say hi to Dave for me.

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code to edit the text in an EditText widgit

- by user293663

Hello, I am a newbi programmer and am having trouble with a measurement conversion program I am working on. What I would like to do is have several EditText boxes. When one is filled in and a calculate button is hit then the rest will be populated with a converted number. The part I am getting stuck on is outputting the answers to EditText widgets. ex: There are three EditText Widgets. a user inputs the number 6 into the first one (labeled inches) and presses calculate. I would like the next box to display .5 (labeled feet) and the last to display .1666 (this would be yards) .setText() apparently does not work to modify the text in an EditText any help would be greatly appreciated.

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Pros and cons of ways of storing an unsigned int without an unsigned int data type

- by fields

I have values that are 64-bit unsigned ints, and I need to store them in mongodb, which has no unsigned int type. I see three main possibilities for storing them in other field types, and converting on going in and out: Using a signed int is probably easiest and most space efficient, but has the disadvantage that they're not human readable and if someone forgets to do the conversion, some of them will work, which may obscure errors. Raw binary is probably most difficult for inexperienced programmers to deal with, and also suffers from non-human-readability. A string representation is the least space efficient (~40 bytes in unicode vs 8 bytes per field), but then at least all of the possible values will map properly, and for querying only a conversion to string is required instead of a more complicated conversion. I need these values to be available from different platforms, so a single driver-specific solution isn't an option. Any major pros and cons I've missed? Which one would you use?

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how can I set the subfigure labels in latex to uppercase?

- by gojira

I made a figure within my latex document using the subfigure package, containing three subfigures. The part where the subfigures are now automatically labelled (a), (b), (c) needs to be uppercase, though. i.e. the result from the latex code in the finally rendered PDF is (a) img1 (b) img2 (c) img3 but it needs to be (A) img1 (B) img2 (C) img3 How can I set this? The code looks something like this: \usepackage{subfigure} [...] \begin{sidewaysfigure}[p] \centering \subfigure[image1]{ \label{fig:img1} \includegraphics[scale=2]{figures/img1.png} } \subfigure[image2]{ \label{fig:img2} \includegraphics[scale=2]{figures/img2.png} } \subfigure[image3]{ \label{fig:img3} \includegraphics[scale=2]{figures/img3.png} } \caption[my images]{\textbf{ My images} I am referring to (A), (B) and (C) respectively.}\label{fig:imgs}\end{sidewaysfigure}

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Why does Git display certain new folders when checking out old revisions?

- by ConnorG

Hey all - I'm still learning the ropes of Git (love it!) but the other day I noticed some behavior I just do not understand. We have, in essence, three folders that got moved into the repository at different times (one immediately after we created the repo, one a little while later, and one just recently). Recently, I had to get some code out of an old revision. I used git checkout <old SHA1 hash> to pull up one of our first checkins, when I noticed Git showed the old folder (as it should), as well as the newest folder (which got added to the repo long after the checked out commit was made). But it did not show the second folder. What would cause Git to display the newest folder with the old revision?

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SQL - How can I apply a "semi-unique" constraint?

- by Erin Drummond

Hi, I have a (simplified) table consisting of three columns: id INT PRIMARY KEY NOT NULL AUTO_INCREMENT, foreignID INT NOT NULL, name VARCHAR NOT NULL Basically, I would like to add a constraint (at the database level rather than at the application level) where it only possible for one unique 'name' to exist per foreignID. For example, given the data (id, foreignid, name): 1,1,Name1 2,1,Name2 3,1,Name3 4,2,Name1 5,2,Name2 I want the constraint to fail if the user tries to insert another 'Name3' under foreignId 1, but succeed if the user tries to insert 'Name3' under foreignId 2. For this reason I cannot simply make the whole column UNIQUE. I am having difficulty coming up with a SQL expression to achieve this, can anybody help me? Thanks

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Title for postion needed, can someone help [closed]

- by Jeffery

I work in a large resort style rental community. Recently I was given a promotion, though my senior management has found it difficult to come up with a job title. I hold the position of concierge manager, spa manager and special events coordinator. So I would like to come up with a job title that would encompass the three areas. The suggested title was Hospitality Director. However it sounds like I would be working at a Hotel. Can someone please give me some ideas. Thank you in advance

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Multiple levels of 'collection.defaultdict' in Python

- by Morlock

Thanks to some great folks on SO, I discovered the possibilities offered by collections.defaultdict, notably in readability and speed. I have put them to use with success. Now I would like to implement three levels of dictionaries, the two top ones being defaultdict and the lowest one being int. I don't find the appropriate way to do this. Here is my attempt: from collections import defaultdict d = defaultdict(defaultdict) a = [("key1", {"a1":22, "a2":33}), ("key2", {"a1":32, "a2":55}), ("key3", {"a1":43, "a2":44})] for i in a: d[i[0]] = i[1] Now this works, but the following, which is the desired behavior, doesn't: d["key4"]["a1"] + 1 I suspect that I should have declared somewhere that the second level defaultdict is of type int, but I didn't find where or how to do so. The reason I am using defaultdict in the first place is to avoid having to initialize the dictionary for each new key. Any more elegant suggestion? Thanks pythoneers!

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Connect two UIScrollView's together

- by johnw188

Here's a tricky iPhone problem I've been working on. I have three UIScrollViews on a page, one that only scrolls horizontally, one that only scrolls vertically, and one that scrolls both horizontally and vertically. I want to lock the views together, so that the horizontal location of the horizontal only scrollview matches the horizontal location of the main scrollview, and the vertical scrollview likewise, so that dragging the main scrollview around controls the horizontal and vertical scrollviews. Problem is, I'm completely stumped. I've looked around inside the apple documentation, but there doesn't seem to be any way to do this officially. One thought that I had was to somehow "clone" any touch on any of the scrollviews to a point on the other two, but I have no idea how to do this. If anyone has any thoughts on this, I'd very much appreciate it.

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SQL Count Query with Grouping by multiple Rows

- by Christian

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T-SQL Picking up active IDs from a comma seperated IDs list

- by hammayo

I have two tables "Product" having following structure: ProductID,ProductName, IsSaleTypeA, IsSaleTypeB, IsSaleTypeC 1, AAA, N, N, N 2, BBB, N, Y, N -- active 3, CCC, N, N, N 4, DDD, Y, N, N -- active 5, EEE, N, N, N 6, FFF, N, N, N 7, FFE, N, N, N 8, GGG, N, N, N 9, HHH, Y, N, N -- active The second table "ProductAllowed" having following structure where ProductIDs is a comma separated string filed having mix of active and inactive product ids based on their IsSaleType mode. ProductCode, ProductIDs AMRLSPN, "1,2" AMRLOFD, "1,3" BLGHVF, "2,4,6" BLGHVO, "2,4" BLGHVD, "3,5" BLGSDO, "0" CHOHVF, "1,6" CHOHVP, "1,2,7,8" ... ... Q: Is there a t-sql query that will return a list of active records from the "ProductAllowed" table if any of three IsSaleType fileds is/are switched on for a product. Based on the sample data the ProductAllowed records should return following records. AMRLSPN BLGHVF BLGHVO BLGSDO CHOHVP This needs to be applied in a SQLSERVER 2000 database containing aprox 150000 records. Thanks

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How to integrate Facebook the new Graph Api with Authlogic in Ruby on Rails?

- by amrnt

I've began with a new project using Authlogic system for Authorization. And I'm now wondering how could I connect Facebook oAuth sessions with my Authlogic session! First of all I want to use and Authlogic-oAuth Gems/Plugins, I what I want to use are just http://github.com/intridea/oauth2 and the interesting http://github.com/nsanta/fbgraph and associate them all with Authlogic. I tried using Authlogic with authlogic-connect extension, but It didnt fill up my needs. And I think the three of the amazing gems above togother will make things done in quality and as I want. Thanks in advance.

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Solid FFmpeg wrapper for C#/.NET

- by Lillemanden

I have been searching the web for some time for a solid FFmpeg wrapper for C#/.NET. But I have yet to come up with something useful. I have found the following three projects, but all of them apears to be dead in early alpha stage. FFmpeg.NET ffmpeg-sharp FFLIB.NET So my question is if anyone knows of a wrapper project that is more mature? I am not looking for a full transcoding engine with job queues and more. Just a simple wrapper so I do not have to make a command line call and then parse the console output, but can make method calls and use eventlisteners for progress. And please feel free to mention any active projects, even if they are stil in the early stages.

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Declaring local variables in assembly

- by dcmoebius

Is it possible to allocate locally-scoped memory in assembly? For example, consider the following (completely contrived) situation: I have two macros, one of which is dependent on the other. The first is: minimum MACRO dest, num1, num2 ; Finds the minimum of two unsigned numbers, stores the result in dest And the second is: tripMin MACRO dest, num1, num2, num3 ; Finds the minimum of three unsigned numbers, stores the result in dest minimum firstMin, num1, num2 minimum secondMin, num2, num3 minimum dest, firstMin, secondMin (I know that this isn't a realistic example for a variety of reasons, but bear with me.) Assuming that all the registers are otherwise occupied, is there any way to declare firstMin and secondMin locally within the macro? Or am I just better off freeing a register by pushing its value onto the stack and popping it back when I'm done?

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How to sekect latest chnge done in the given Table structure?

- by OM The Eternity

I have a Table structure as id, trackid, table_name, operation, oldvalue, newvalue, field, changedonetime Now if I have 3 rows for the same "trackid" same "field", then how can i select the latest out of the three? i.e. for e.g.: id = 100 trackid = 152 table_name = jos_menu operation= UPDATE oldvalue = IPL newvalue = IPLcccc field = name live = 0 changedonetime = 2010-04-30 17:54:39 and id = 101 trackid = 152 table_name = jos_menu operation= UPDATE oldvalue = IPLcccc newvalue = IPL2222 field = name live = 0 changedonetime = 2010-04-30 18:54:39 As u can see above the secind entry is the latest change, Now what query I shoud use to get the only one and Latest row out of many such rows...

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named_scope or find_by_sql?

- by keruilin

I have three models: User Award Trophy The associations are: User has many awards Trophy has many awards Award belongs to user Award belongs to trophy User has many trophies through awards Therefore, user_id is a fk in awards, and trophy_id is a fk in awards. In the Trophy model, which is an STI model, there's a trophy_type column. I want to return a list of users who have been awarded a specific trophy -- (trophy_type = 'GoldTrophy'). Users can be awarded the same trophy more than once. (I don't want distinct results.) Can I use a named_scope? How about chaining them? Or do I need to use find_by_sql? Either way, how would I code it?

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Emacs enum indentation

- by Masterofpsi

I'm having a problem with Emacs's indentation of Java enums. While it indents the first member OK, it wants to give all of the rest of the static enum members an additional level of indentation. It looks like this: class MyClass { public enum MyEnum { ONE(1), //good TWO(2), // not good! THREE(3), FOUR(4); private final int value; } } When I run C-c C-s on the line that opens the enum, it gives me ((inclass 1) (topmost-intro 1)), which doesn't seem quite right -- it seems like it should be giving brace-list-open. When I run it on the first enum member, it gives me ((defun-block-intro 21)), which is definitely not right. Every subsequent member gives (statement-cont 50). I'm in java-mode and I'm using the java style of indentation. Does anyone know what the problem might be?

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MySql SELECT AS - Append all field names

- by jeerose

I'd like to do something like this: SELECT table.id AS prefix_id, table.name AS prefix_name ... and have the prefix added dynamically to all field names rather than selecting them all manually (ie SELECT table.* AS prefix_* or something) Hopefully I've described that accurately. Any thoughts? Edit To be clear, the reason I'm asking is to make sure that my query result contains every column from each table I call even if there are duplicate field names. For example, I might have a table with lots of fields which means I don't want to alias all the fields manually. Further if 3 tables have a field called name my result won't contain three name results; it will have one. I want to avoid ambiguity with my column names.

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Purpose of Trigraph sequences in C++?

- by Kirill V. Lyadvinsky

According to C++'03 Standard 2.3/1: Before any other processing takes place, each occurrence of one of the following sequences of three characters (“trigraph sequences”) is replaced by the single character indicated in Table 1. ---------------------------------------------------------------------------- | trigraph | replacement | trigraph | replacement | trigraph | replacement | ---------------------------------------------------------------------------- | ??= | # | ??( | [ | ??< | { | | ??/ | \ | ??) | ] | ??> | } | | ??’ | ˆ | ??! | | | ??- | ˜ | ---------------------------------------------------------------------------- In real life that means that code printf( "What??!\n" ); will result in printing What| because ??! is a trigraph sequence that is replaced with the | character. My question is what purpose of using trigraphs? Is there any practical advantage of using trigraphs? UPD: In answers was mentioned that some European keyboards don't have all the punctuation characters, so non-US programmers have to use trigraphs in everyday life? UPD2: Visual Studio 2010 has trigraph support turned off by default.

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Recover from inadvertent skip during rebase

- by Benjol

I just tried to rebase a very old branch with a minor modification onto my master. There was a problem with merging just one of the three files involved, so I did an unthinking --skip, thinking that it would just skip that file, but as it happened, it seems to have skipped all my changes, and rolled forwards. So now the rebase is finished, and my changes seem to have disappeared. I've seen the question about undoing rebase, but it's all greek to me, I see the reflog, but I don't know which commit the branch was attached to before the rebase. In any case, I don't really need to undo the rebase, I just want to be able to recover the changes in the two files. Is there anyway to do this properly (failing this, I'll just have to restore yesterday's backup of my repository and pick the bits out by hand).

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C#: How do I get the path of the assembly the code is in?

- by George Mauer

Is there a way to get the path for the assembly in which the current code resides? I do not want the path of the calling assembly, just the one containing the code. Basically my unit test needs to read some xml test files which are located relative to the dll. I want the path to always resolve correctly regardless of whether the testing dll is run from TestDriven.NET, the MbUnit GUI or something else. Edit: People seem to be misunderstanding what I'm asking. My test library is located in say c:\projects\myapplication\daotests\bin\Debug\daotests.dll and I would like to get the "*c:\projects\myapplication\daotests\bin\Debug*" path. The three suggestions so far fail me when I run from the MbUnit Gui: Console.Out.Write(Environment.CurrentDirectory) gives c:\Program Files\MbUnit Console.Out.Write(System.Reflection.Assembly.GetAssembly(typeof(DaoTests)).Location) gives C:\Documents and Settings\george\Local Settings\Temp\ ....\DaoTests.dll Console.Out.Write(System.Reflection.Assembly.GetExecutingAssembly().Location) gives the same as the previous

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Reports in ASP.net

- by Raghu

Hi, I developed one report, that contains centers, months, and total leads and total sales. Report is executed and working properly. Now the issue with this is i want the report like.... Center1 Center2 Center3.............. SaleDate TotalLeads Total Sales Jan Feb Mrach TotalLeads Total Sales Jan Feb Mrach 03/01/2010 2341 23 2 4 17 ..................................................... But I am Getting the report as Center1 Center2 Center3.............. SaleDate TotalLeads Total Sales Mrach TotalLeads Total Sales Mrach 03/01/2010 2341 23 17 ..................................................... then how to set the properties to it. Please help me, i stuck with this from the past three days.. this is very important and urgent... Please give me sugessionsss......

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- by InnateDev

- by Damien Dennehy

- by fmark

- by stephemurdoch

- by user293663

- by fields

- by gojira

- by ConnorG

- by Erin Drummond

- by Jeffery

- by Morlock

- by johnw188

- by Christian

- by hammayo

- by amrnt

- by Lillemanden

- by dcmoebius

- by OM The Eternity

- by keruilin

- by Masterofpsi

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- by Kirill V. Lyadvinsky

- by Benjol

- by George Mauer

- by Raghu

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