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• F# for C#/Haskell programmer

  - by Maciej Piechotka

  What is recommended tutorial of F# for Haskell programmer? F# seems to borrow a lot from Haskell but there are little traps which makes hard to write. Generally I need walkthrough the F# which would not explain what is the difference between mutable data and immutable (Haskell is much more strict in this area) etc. I know C# a little so I know more or less what .Net is about as well.

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• run applescript on 2x-click

  - by scottru

  OK, this feels like an idiot question, but I'm stuck - I don't know the first thing about AppleScript. I have a .scpt file and I want to double-click it and just have it run, but instead every time I click, it opens up the AppleScript Editor. This feels like it should just be an option on the file, but I'm missing something obvious. Please help me feel less dumb, thank you.

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• What's the most minimal way to achieve Dependency Injection?

  - by Chuck

  I've been reading about Spring and although it's claimed to be a less complex alternative to EJB, I'm having a hard time wrapping my head around it. Is there a more minimal way of achieving Dependency Injection than adopting the Spring approach?

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• c# uploading file - error

  - by user228058

  I have a webpage where the user can upload an excel file. I'm trying 2 different files - one works without a problem, and the other one gives me this error: Error: Length cannot be less than zero. Parameter name: length I know that sometimes this occurs when the file size is zero, but that is not the case here. Can anyon shed light on this issue? Please let me know if you need more info.

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• hi how restrict the year in jquery datepicker?

  - by udaya

  Hi I am using jquery.datePicker.js js file to create a date picker This is whati have in my view page <input type="text" style="font-family: verdana; width: 80px;" id="txtArrivalDate" class="startDate" name="txtArrivalDate" value="<?php echo $_POST['txtArrivalDate'] ?>" /> when i click on the arrival date text box the year column starts on current year say 2010 but the years less than 2010 also available on the year select box how to get rid of the years below current year

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• how to use conditional select query ? in sqlserver

  - by Arunachalam

  how to use conditional select query ? in sqlserver i have a column in which i store date type variable .now i should retrieve one value from that column and find the difference with the curent_timestamp and if the difference is less than 10 mins i should a return 1 and if more than 10 mins i should return 0.is it possible ? 05-12-2010 13.58.30 - 05-12-2010 13.56.30 here the difference is 2 so it should return 1 .

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• High-Quality Text-To-Speech engine for personal use

  - by phihag

  I'm looking for a high-quality TTS engine that I can afford (let's say less than 1000$). So far, I've tried flite and festival. However, while the results are certainly understandable, technical texts are hard to follow. Commercial TTS solutions from Loquendo and Readspeaker sound way better. However, these companies don't seem to be willing to sell their product to mere mortals - I can't find a price on either's homepage. So, what are good TTS solutions for personal use?

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• Link list usage in system programming

  - by Pwn

  Hi, in spite of having so many efficient data structures, why is only linked list used so heavily in systems programming? Is it because it allows least usage of heap/less buggy code? Regards, Pwn

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• Proper way to store user information

  - by Darthg8r

  The standard Joomla registration forms has a limited set of fields available. What's the "correct" method for adding the user's first name, last name, and phone number to the registration project? I can certainly modify the Joomla core, but that's less than ideal. A nickel for your thoughts.

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• Ruby variable troubles.

  - by James Moore

  Hey, Im sure I am missing something here but none the less. foo['bar'] = nil if(foo['bar'] == nil) puts "foo bar is nil :(" However, nothing happens? Any thoughts?

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• smallest filesize for transparent single pixel image

  - by zaf

  I'm looking for the smallest (in terms of filesize) transparent 1 pixel image. Currently I have a gif of 49 bytes which seems to be the most popular. But I remember many years ago having one which was less than 40 bytes. Could have been 32 bytes. Can anyone do better? Graphics format is no concern as long as modern web browsers can display it and respect the transparency.

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• How to find subgroups statistics in pandas?

  - by user2808117

  I am grouping a DataFrame using multiple columns (e.g., columns A, B - my_df.groupby(['A','B']) ), is there a better (less lines of code, faster) way of finding how many rows are in each subgroup and how many subgroups are there in total? at the moment I am using: def get_grp_size(grp): grp['size'] = len(grp) return grp my_df = my_df.groupby(['A','B']).apply(get_grp_size) my_df[['A','B','size']].drop_duplicates().size

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• Is there a way to list all the available drive letters in python?

  - by Electrons_Ahoy

  More or less what it says on the tin: is there an (easy) way in Python to list all the currently in-use drive letters in a windows system? (My google-fu seems to have let me down on this one.) Related: Enumerating all available drive letters in Windows (C++ / Win32)

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• How do I change the WPF Expander Header Text when expanded or collapsed?

  - by Scott Ferguson

  Using a WPF expander, I want the Header to change from See More to See Less when the control is expanded, and back to See More when it's collapsed again. I'd prefer a WPF pure solution, rather than a C# or other code behind method. I get the feeling this should be easy, but I'm struggling for the right terms to get a solution via google. Thanks!

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• How do i change the start in path of a shortcut for nsis?

  - by Lodle

  I have an nsis installer script for the application im working on and it can place a shortcut on the desktop and in the start menu folder but each shortcut has the wrong start in path and as such the app saves data files to where the short cut is. Is there an easy way to change the start in path as the documentation was less than helpful on the matter? Section "Desktop Shortcut" SHORTCUT SetOutPath "$DESKTOP" CreateShortcut "${FULL_APP_NAME}.lnk" "$INSTDIR\${APP_NAME}.exe" "" "$ICONDIR\${DESKICO}" SectionEnd

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• Qt QTableView and horizontalHeader()->restoreState()

  - by cheez

  I can't narrow down this bug, however I seem to have the following problem: - saveState() of a horizontalHeader() - restart app - Modify model so that it has one less column - restoreState() - Now, for some reason, the state of the headerview is totally messed up. I cannot show or hide any new columns, nor can I ever get a reasonable state back I know, this is not very descriptive but I'm hoping others have had this problem before.

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• How to Generate Castle ActiveRecord C# Classes for an Existing Database

  - by Russell Giddings

  What is the best way to generate C# classes for use with Castle ActiveRecord and NHibernate given an existing database structure? Can you recommend any of the class generation tools or is it just less hassle to write the classes by hand?

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• how do you become a junior VB/C#/C++ .net developer without a formal programming education ?

  - by bosh

  do i need to get the Microsoft Certification ? will this guarantee a job or improve my chances ? do i show a portfolio ? (sorry i used to be web programming but enjoying it less) do i need to get comp sci degree ?

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• scaling an image, but keep its proportions

  - by mrblah

  I want to scale images, but I don't want the image to look skewed. The image has to be 115x115 (length x width). The image can't be over 115 pixels high (length), but if needed, the width can be less than 115 but not more. Is this tricky?

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• Sticky footer with CSS Layout Template Module?

  - by boris callens

  I'm currently looking into the JQuery library for CSS Layout Template module Is it possible to define the height of a placeholder with *? Meaning it will push content down if it has to, or fill up any remaining space if the complete content is less then the view port. This would be really nice to make the whole sticky footer thing much easier and robust.

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• Is there a Railscasts for Django?

  - by J McConnell

  I learned everything I know about Rails from Railscasts. Now I want to learn Django but I'm not finding any comprehensive tutorial resources like Railscasts. Does an equivalent not exist in the Django world? If so, is that because there is less to learn?

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• struct and arguments

  - by jay

  I am trying to modularize a function that used to add values to multiple structures in one call. Now I want to do one value addition per call, but I am not sure how to make a less specific argument reference. func ( [?] *val ) { }

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• DCVS + hosting for a startup commercial multiplatform phone app

  - by AG

  I'm in lean startup mode, working on a simple phone app that will be published initially as a iThingy app and an Android app with, possibly, Blackberry and Symbian versions to follow. I'm about to go from no repository to needing a central repository that up to 4 very part-time resources will be sharing. Two of us have no version control background, one has used Subversion, and I've used most of the major centralized VCS systems. I'm not going to be pushing the technical limitations of any VCS for a long time; I'm sure that any of the major systems would work fine. And the hosting accounts I've looked at seem reasonable. So I'm really focussed on minimizing the downside risks. That is, I'd like to find a stable setup that is easy to learn in general, easy to use from Windows/Eclipse, and won't paint me into any obvious corners for the next 12 months or so. A quick search of the web had led me to consider the following pairs of DVCS and hosting service, with what I think I'm hearing as their strengths and weaknesses (for my purposes): Bazaar/Launchpad -- My initial choice since I need to get more familiar with this pair for the Google Summer of Code mentoring I'm doing. But, whatever the technical merits, a non-starter for me because they are purely open source, no private repositories plans to purchase that I can see. Git/GitHub -- Git: Fast, light, ultimately flexible, but relatively less Windows friendly, Eclipse plugin (eGit) available but relatively young, GitHub: widely used, pricing is fine Mercurial/BitBucket -- Mercurial: a little less flexible, a little more Windows friendly, Eclipse plugin seems a bit more mature, BitBucket: widely used, pricing is fine, includes a wiki and an issue tracker that we might be able to use instead of something like BaseCamp, at least for a while. Mercurial/BitBucket seem like the winning pair so far for my particular situation; at least two of us are definitely going to be working mostly from Eclipse on Windows and reducing my own learning curve is a priority. ;-) But I have two specific questions: 1) Am I wrong about Bazaar/Launchpad and is there a viable, secure way to use them for proprietary code? 2) Any reason to think that the Mecurial/Bitbucket pair will end up being a headache for my Mac developer, soon, or for Blackberry or Symbian developers a little later? ag

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• Create an Xml file from an object (c#)

  - by remi bourgarel

  Hi All, I work as a web developer with a web designer and we usually do like this : - I create the system , I generate some Xml files - the designer display the xml files with xslt Nothing new. My problem is that I use Xml Serialization to create my xml files, but I never use Deserialization. So I'd like to know if there is a way to avoid fix like these : empty setter for my property empty parameter-less constructor implement IXmlSerializable and throw "notimplementedexception" on deserialization do a copy of the class with public fields thanks.

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• Best way to detect that HTML5 <canvas> is not supported

  - by brainjam

  The standard way to deal with situations where the browser does not support the HTML5 <canvas> tag is to embed some fallback content, usually a polite version (and sometimes a less polite version) of <canvas>Your browser sucks</canvas> But the rest of the page remains the same, which may be inappropriate or misleading. I'd like some way of detecting canvas non-support so that I can present the rest of my page accordingly. What would you recommend?

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