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• eBook editions of programming books

  - by Jon Hopkins

  (I'll get my justification for why this is on topic in early: programming books tend to have fairly specific formatting needs - code samples, tables, images and graphs - which are not common to all book types and are not necessarily well handled by eBook readers. Similarly they're used in different ways - you often dip in and out rather than read cover to cover.) I've just noticed that Don't Make Me Think by Steve Krug is available as an eBook edition for the Kindle (and presumably also for other readers) which set me thinking. There are certain advantages to eBook readers for tech books - primarily that you can carry a massive library of what would be heavy physical books around very easily. The downside is that certain eBook readers allegedly aren't particularly well equipped to cope with tables, code samples and so on and a book like Don't Make Me Think presumably makes extensive use of these sorts of things. So, the question, what are your experiences of reading and using programming books on an eBook reader and would you recommend it? I'm specifically interested in the latest generation Kindle but happy to hear about all devices - might be useful to state which one you use in the answer.

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• How do "custom software companies" deal with technical debt?

  - by andy

  What are "custom software companies"? By "custom software companies" I mean companies that make their money primarily from building custom, one off, bits of software. Example are agencies or middle-ware companies, or contractors/consultants like Redify. What's the opposite of "custom software companies"? The oposite of the above business model are companies that focus on long term products, whether they be deployable desktop/mobile apps, or SaaS software. A sure fire way to build up technical debt: I work for a company that attempts to focus on a suite of SaaS products. However, due to certain constraints we sometimes end up bending to the will of certain clients and we end building bits of custom software that can only be used for that client. This is a sure fire way to incur technical debt. Now we have a bit of software to maintain that adds nothing to our core product. If custom work is a sure fire way to build technical debt, how do agencies handle it? So that got me thinking. Companies who don't have a core product as the center of their business model, well they're always doing custom software work. How do they cope with the notion of technical debt? How does it not drive them into technical bankruptcy?

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• How to tell your boss that his programming style is really bad?

  - by Roflcoptr

  I'm a student and in my spare time I'm working for a big enterprise as Java developer. The job is good, but the problem is, my boss is writing very strange code. I don't want to complain, but some issues are in my opinion really strange. For example: he doesn't know any booleans. All boolean conditions are Strings called "YesOrNo" and then in the condition he uses if (YesOrNo == "Yes") there are a lot of very strange characters in method names and variables like é õ ô or è all loops are infinite loops in the style of for(;;). Then at the end of the loop the condition is tested and if the conditions is fulfilled break; is called. I don't now if I should tell him that I think this isn't a good practice, since he is my boss and decides how and what to do. On the other hand some of this examples are really very weird. Any hints how to cope with? And is this only me who thinks that's bad style?

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• From Oracle PL/SQL Developer to Java programmer - Is it a good decision? [on hold]

  - by user3554231

  I will explain my question in simple words. I have little over 1 year experience in Oracle. My dream is to be "called" as a 'Developer', be it database developer if not software developer. But right now I don't develop anything neither I am in good touch with PL/SQL and other Oracle Utilites like SQL*LOADER, shell scripting and stuff like that as I am only a System Analyst where I analyze and configure database using SQL queries. To be honest, I know very basic PL/SQL and good knowledge in SQL but that won't ever give me a chance to be a developer as I am lagging way behind the "real" developers knowledge. Now I feel I should learn JAVA as well so that I can cope up with the competition. But I am too scared to learn new things as it will take much more time which will indirectly increase my useless work experince(just analyzing) which values nothing in todays market. Moreover that, I am too lazy to work hard i.e. to study and not to work during office hours. To sum it up I am lazy and confused and scared but I want to learn things as well but don't know if I am intelligent enough to learn whole of PL/SQL or to master any other language. Is there any other way from which I can feel confident? Actually I even feel sometimes that after 2-3 years if I still don't achieve my goal, I won't ever be able to reach my destination. I just want to live my dream of being a developer. Give me some tips and hopes but not false hopes.

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• Encrypt SSD or not?

  - by JamesBradbury

  My desktop machine is running Ubuntu 12.04 (and will probably stay with it until the next LTS). I've got a new 120GB SSD on the way as my existing 420GB spinning disk. If it makes any difference I'll be dual-booting with Windows 7 across both disks too. I've read some helpful answers here about /home setup and enabling TRIM, which I intend to follow. So most of my /home will be on the SSD, with only photos, videos and music on the spinning disk. The question is, when I reinstall Ubuntu from CD or USB, whether I should encrypt the SSD? Specifically: I'm reading that drive wear isn't much of an issue with modern SSDs as they last decades even if you spam them. Is this true? How big a performance reduction will encrypting cause (I have an i7 Sandybridge, so I guess it can cope)? Is it more important from a security point of view to encrypt an SSD? I think I read somewhere that it may be hard to reliably wipe data. By all means answer even if you only know about one of those things.

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• Limiting calls to WCF services from BizTalk

  - by IntegrationOverload

  ** WORK IN PROGRESS ** This is just a placeholder for the full article that is in progress. The problem My BTS solution was receiving thousands of messages at once. After processing by BTS I needed to send them on via one of several WCF services depending on the message content. The problem is that due to the asynchronous nature of BizTalk the WCF services were getting hammered and could not cope with the load. Note: It is possible to limit the SOAP calls in the BtsNtSvc.exe.Config file but that does not have the desired results for Net-TCP WCF services. The solution So I created a new MessageType for the messages in question and posted them to the BTS messaeg box. This schema included the URL they were being sent to as a promoted property. I then subscribed to the message type from a new orchestraton (that does just the WCF send) using the URL as a correlation ID. This created a singleton orchestraton that was instantiated when the first message hit the message box. It then waits for further messages with the same correlation ID and type and processs them one at a time using a loop shape with a timer (A pretty standard pattern for processing related messages) Image to go here This limits the number of calls to the individual WCF services to 1. Which is a good start but the service can handle more than that and I didn't want to create a bottleneck. So I then constructed the Correlation ID using the URL concatinated with a random number between 1 and 10. This makes 10 possible correlation IDs per URL and so 10 instances of the singleton Orchestration per WCF service. Just what I needed and the upper random number is a configuration value in SSO so I can change the maximum connections without touching the code.

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• VCS strategy with TeamCity and CI

  - by Luke Puplett

  I'm planning a strategy which seeks to allow automated deployment of a website codebase into QA and production on check-in. We're using the fabulous TeamCity. We want to control release to live production; i.e. not have every check-in on Trunk go live. So my plan is to use Trunk as QA. Committing to Trunk triggers deployment to QA. I will then have a Production branch which also triggers deployment on commit, to the live site. The idea is simply that Trunk represents the mainline codebase but it hasn't gone live yet. We can branch features and do daily pulls from Trunk into those feature branches as per normal and merge/re-integrate into Trunk when we're happy for it to go to QA. When the BAs give the nod, we then smash a bottle of champagne and merge Trunk to Production and out she goes. I've never seen it done like this. Other greenfield CI strategies involve hiding features and code from production via config - this codebase can't cope with that - or just having CI on QA and taking cuts and manually pushing to live. Does my plan sound alright?

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• Caption Competition 2: The Captioning

  - by Simple-Talk Editorial Team

  Caption competition time again! What’s going on here then?   Some suggestions to get your comedy juices flowing: “So long chaps, hope you can continue to cope without a written disaster plan!” – said the only DBA “These shoes cost a lot of money, I’m not muddying them in the SAN Admin waters!” “Down Devs, down. Stay away from my database.” It had taken a lot of time and work, but finally Trevor’s out of office setup had the sense of occasion he needed. “Could you just add one small feature?” shouted upper management, hurtling by. Add your suggestion in the comments for a chance to win $50 in Amazon vouchers. Anything computer-related will help, but feel free to suggest anything. The competition runs until 5 p.m. (BST) on Friday the 16th of May.

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• IIS URL Rewrite - Redirect any HTTPS traffic to sub-domain

  - by uniquelau

  We have an interesting hosting environment that dictates all secure traffic must travel over a specific sub domain. E.g. http://secure.domain.com/my-page I'd like to handle this switch using URL Rewrite, i.e. at server level, rather than application level. My cases are: https://secure.domain.com/page = NO CHANGE, remains the same https://domain.com/page = sub-domain inserted, https://secure.domain.com/page https://www.domain.com/page = remove 'www', insert sub-domain In my mind the logic is: INPUT = Full Url = http://www.domain.com/page If INPUT contains HTTPS Then check Full URL, does it contain 'secure'? If YES do nothing, if no add 'secure' If INPUT contains 'www' remove 'www' The certificate is not a wild card (e.g. top level domain) and is issues to: https://secure.domain.com/ The website could also be hosted in a staging environment. E.g. https://secure.environment.domain.com/ I do not have control over 'environment' or 'domain' or the 'tld'. Laurence - Update 1, 19th August So as mentioned below, the trick here is to avoid a redirect loop that could drive anyone well loopy. This is what I propose: One rule to force certain traffic to the secure domain: <rule name="Force 'Umbraco' to secure" stopProcessing="true"> <conditions logicalGrouping="MatchAll"> <add input="{REQUEST_URI}" pattern="^/umbraco/(.+)$" ignoreCase="true" /> <add input="{HTTP_HOST}" negate="true" pattern="^secure\.(.+)$" /> </conditions> <action type="Redirect" url="https://secure.{HTTP_HOST}/{R:0}" redirectType="Permanent" /> </rule> Another rule, that then removes the secure domain, expect for traffic on the secure domain. <rule name="Remove secure, expect for Umbraco" stopProcessing="true"> <match url="(.*)" ignoreCase="true" /> <conditions logicalGrouping="MatchAll"> <add input="{HTTP_HOST}" pattern="^secure\.(.+)$" /> <add input="{REQUEST_URI}" negate="true" pattern="^/umbraco/(.+)$" ignoreCase="true" /> </conditions> <!-- Set Domain to match environment --> <action type="Redirect" url="http://staging.domain.com/{R:0}" appendQueryString="true" redirectType="Permanent" /> </rule> This works for a single directory or group of files, however I've been unable to add additional logic into those two rules. For example you might have 3 folders that need to be secure, I tried adding these as Negate records, but then no redirection happens at all. Hmmm! L

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• IIS 6.0 Server Too Busy HTTP 503 Connection_Dropped DefaultAppPool

  - by Shiraz Bhaiji

  We have a site which is running on a windows 2003 cluster with 2 64bit machines. The site needs to be able to cope with over 20,000 concurrent users One of the things that the site does is to allow the download of a 2MB file (which is cached in memory). We have low CPU and memory usage. We also have surplus bandwidth. It appears that we are running out of connections due the time it takes the user to download the file (some users have slow internet connections). In the IIS log we get HTTP 503 errors. In the HTTPErr log we get mainly Connection_Dropped DefaultAppPool with some Timer_EntityBody DefaultAppPool. Question is: How can we configure IIS to allow more connections? Or is there something that I am missing here? Thanks Shiraz

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• Space partitioning algorithm

  - by Karol Kolenda

  I have a set of points which are contained within the rectangle. I'd like to split the rectangles into subrectangles based on point density (giving a number of subrectangles or desired density, whichever is easiest). The partitioning doesn't have to be exact (almost any approximation better than regular grid would do), but the algorithm have to cope with the large number of points - approx. 200 millions. The desired number of subrectangles however is substantially lower (around 1000). Does anyone knows any algorithm which may help me with this particular task?

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• protobuf-net - backticks, Dictionaries & .proto files

  - by JosephH

  I'm trying to talk to a C# program that uses protobuf-net from an iphone using http://code.google.com/p/metasyntactic/wiki/ProtocolBuffers Unfortunately the .proto file I've been given (generated from the C# source code) includes an a line that protoc is rejecting: repeated Pair_Guid_List`1 Local = 6; It appears that this is because the source data is a C# Dictionary, with a Guid key and a class as the value. Is there a way to cope with this better? The protobuf-net version in use is r278.zip. (The C# sending and receiving these protobufs all works fine, it's just when we add the iphone into the mix that this becomes an issue.)

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• Article search engine in php

  - by Jason

  Hello, I am using sphinx as a search engine on my website its working perfect and I have no complain with it. The only thing it lacks is, it does not allow me to search articles whose query length is more than 15 words. I know in reality people don't use more than 3-4 words i want to use it for finding duplicate contents. I was wondering if there is any alternative solution to sphinx. I want to cope with duplicate contents. My main articles table is in innodb but I am also caching articles into MyISAM table as well for full text searching but when I search an article it takes ages to perform one search. Its not the query problem, i think mysql lacks the fulltext searching facility. Thanks Jason

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• Databind' is not a member of 'CrystalDecisions.Windows.Forms.CrystalReportViewer'

  - by Selom

  Hi, ive being trying to cope with this problem but still. I need your help. Im having the following error message: Databind' is not a member of 'CrystalDecisions.Windows.Forms.CrystalReportViewer' in my code: Dim rpt As New CrystalReport1() Dim da As New SQLiteDataAdapter Dim ds As New presbydbDataSet 'Dim cmd As New SQLiteCommand("SELECT personal_details.fn, training.training_level FROM personal_details INNER JOIN training ON Staff_ID WHERE personal_details.staff_ID='" + detailsFrm.Label13.Text + "'", conn) Dim cmd As New SQLiteCommand("SELECT * FROM personal_details WHERE personal_details.staff_ID='" + detailsFrm.Label13.Text + "'; SELECT * FROM training WHERE training.staff_ID='" + detailsFrm.Label13.Text + "'", conn) cmd.ExecuteNonQuery() da.SelectCommand = cmd da.Fill(ds) rpt.SetDataSource(ds) rpt.Subreports.Item("personal_detailsRpt").SetDataSource(ds.Tables("personal_details")) rpt.Subreports.Item("trainingRpt").SetDataSource(ds.Tables("training")) CrystalReportViewer1.ReportSource = rpt CrystalReportViewer1.DataBind() Im using vb.net and these are the imports Im using: Imports System.Data.SQLite Imports System.Configuration Imports CrystalDecisions.CrystalReports.Engine Imports CrystalDecisions.ReportAppServer Please how can I get rid of this error? Thanks for answering

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• WPF: Sort of inconsistence in the visual appearence of WPF controls derived by Selector class

  - by msfanboy

  Hello, focused items == selected items but selected items != focused items. Have you ever wondered about that? Do you specially style the backcolor of a focused/selected item ? I ask this question because a user has an enabled button because some customer items are selected. The user is wondering now "why the heck can I delete this customers (button is enabled...) when I have just clicked on the orders control selecting some orders ready to delete (button is enabled too). The thing is the selected customer items are nearly looking grayed out in the default style... Well its sort of inconsistence to the user NOT to the programmer because WE know the behavior. Do you cope with stuff like that?

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• How do you prevent file confusion if version-control keywords are forbidden?

  - by Thomas L Holaday

  At least two brilliant programmers, Linus Torvalds and Guido von Rossum, disparage the practice of putting keywords into a file that expand to show the version number, last author, etc. I know how keyword differences clutter up diffs. One of the reasons I like SlickEdit's DiffZilla is because it can be set to skip leading comments. However, I have vivid memories of team-programming where we had four versions of a file (two different releases, a customer one-off, and the development version) all open for patching at the same time, and was quite helpful to verify with a glance that each time we navigated to an included header we got the proper one, and each time we pasted code the source and destination were what we expected. There is also the where-did-this-file-come-from problem that arises when a hasty developer copies a file from one place to another using the file system, rather than checking it out of the repository using the tool; or, more defensibly, when files under control in locations A, B, and C need to be marshalled (with cherry-picking) into a distribution location D. In places where VCS keywords are banned, how do you cope?

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• Recommendations for 'C' Project architecture guidlines?

  - by SiegeX

  Now that I got my head wrapped around the 'C' language to a point where I feel proficient enough to write clean code, I'd like to focus my attention on project architecture guidelines. I'm looking for a good resource that coves the following topics: How to create an interface that promotes code maintainability and is extensible for future upgrades. Library creation guidelines. Example, when should I consider using static vs dynamic libraries. How to properly design an ABI to cope with either one. Header files: what to partition out and when. Examples on when to use 1:1 vs 1:many .h to .c Anything you feel I missed but is important when attempting to architect a new C project. Ideally, I'd like to see some example projects ranging from small to large and see how the architecture changes depending on project size, function or customer. What resource(s) would you recommend for such topics? Thanks

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• Keyboard layout for international programmers?

  - by splattne

  I think everybody who had to program using a standard German (or any other international) keyboard layout on Windows (or Mac) will complain about the conundrum of either having all special characters ( [ ] | { } / etc. ) needed for most programming languages "at the fingertip" and "losing" the language specific characters (umlauts ä ö ü etc.) on the keyboard or viceversa: having simple access to umlauts, but not to brackets etc. If you are programming in C / C++ / C# / Java / Javascript for example, it is very exhausting if you have to press Alt-Gr + 7 for every opening curly bracket. It is an ergonomic nightmare and reduces your typing efficiency. What is the best way to cope with this problem? Is there a satisfying solution? Maybe there are special layouts or keyboards which address this issue?

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• How to determine the maximum integer the model can handle?

  - by John Mee

  "What is the biggest integer the model field that this application instance can handle?" We have sys.maxint, but I'm looking for the database+model instance. We have the IntegerField, the SmallIntegerField, the PositiveSmallIntegerField, and a couple of others beside. They could all vary between each other and each database type. I found the "IntegerRangeField" custom field example here on stackoverflow. Might have to use that, and guess the lowest common denominator? Or rethink the design I suppose. Is there an easy way to work out the biggest integer an IntegerField, or its variants, can cope with?

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• WPF Localization Using LocBaml: Handling Special Symbols

  - by Aryeh

  Hello, I’m dealing with localization of a WPF application (Visual Studio 2010 under Windows 7). I’ve just accomplished the whole process of localization using LocBaml tool, as explained in WPF Globalization and Localization Overview and in related posts. The target language is Italian (it-IT culture). When I run my application in Italian, I have a problem with interpretation of the special symbols of © and ™: they both appear there as a white question sign upon a black diamond-shaped background. The symbols © and ™ appear identically in both English and Italian CSV-files. I tried also the special letters (such as È, à etc.) that are present in Italian but absent in English, and they also are interpreted as the above diamond-shaped question. In Region and Language, I changed the system locale to Italian[Italy], restarted the PC and ran the application again – this helped me in the past to cope with a similar problem in localization of C++ applications under Windows XP, but now it didn’t help, either. Has somebody any idea what is the catch here?

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• Ajaxifying Struts2 application

  - by scotty

  I just started working on an application that is build on the Struts2 framework. I am coming from a .Net application with lot of Ajax features like dimming the rest of the site and show dialog box 'please wait while X is happening' ...auto complete and such other ajax features. I searched google for Ajax plugins for Struts2 but did not find anything that looks like it would be worth it. Is my only option to use jquery and its plugins? Is this a pattern that some of you have seen also? Hopefully Java applications are not dead soon because of its inability to cope with ajax...compared to .Net

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• SVN: is it possible to delete a branch that was copied removed etc for good?

  - by dimus

  I have to remove a branch from svn history for good. Normally I would use svnadmin dump /path/to/repo |svndumpfilter --drop-empty-revs --renumber-revs exclude /branches/bad_branch However this branch was not just created, but also moved and then removed and dump script fails to process downstream information with messages like: Invalid copy source path '/branches/bad_branch' So I imagine 2 ways to cope with the problem keep only last few revisions of the history and put current repository as an archive on the web make a dump up to the revision where the 'bad_branch' was created and apply the rest of the changes as a patch, therefore losing history of a few recent commits. Is there a better, cleaner way to deal with this?

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• SQL searching table fields with LIKE

  - by Tom Gullen

  Given your data stored somewhere in a database: Hello my name is Tom I like dinosaurs to talk about SQL. SQL is amazing. I really like SQL. We want to implement a site search, allowing visitors to enter terms and return relating records. A user might search for: Dinosaurs And the SQL: WHERE articleBody LIKE '%Dinosaurs%' Copes fine with returning the correct set of records. How would we cope however, if a user mispells dinosaurs? IE: Dinosores (Poor sore dino). How can we search allowing for error in spelling? We can associate common misspellings we see in search with the correct spelling, and then search on the original terms + corrected term, but this is time consuming to maintain. Any way programatically?

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• How to learn as a lone developer?

  - by fearofawhackplanet

  I've been lucky to work in a small team with a couple of experienced and knowledgeable developers for the first year of my career. I've learned a huge amount. But I'm now getting transferred within my company, and will be working on solo projects. I'll cope, but I know I'll make mistakes and won't always produce the best solutions without someone to guide me and review my output. I'm wondering if anyone has any tips in this situation. How can I keep learning? What's the best way to monitor and asses the quality of my work? How can I ensure that my career and skills don't stagnate?

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• Recommendations for 'C' Project architecture guidelines?

  - by SiegeX

  Now that I got my head wrapped around the 'C' language to a point where I feel proficient enough to write clean code, I'd like to focus my attention on project architecture guidelines. I'm looking for a good resource that coves the following topics: How to create an interface that promotes code maintainability and is extensible for future upgrades. Library creation guidelines. Example, when should I consider using static vs dynamic libraries. How to properly design an ABI to cope with either one. Header files: what to partition out and when. Examples on when to use 1:1 vs 1:many .h to .c Anything you feel I missed but is important when attempting to architect a new C project. Ideally, I'd like to see some example projects ranging from small to large and see how the architecture changes depending on project size, function or customer. What resource(s) would you recommend for such topics?

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