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  • Why has C prevailed over Pascal?

    - by Konrad Morawski
    My understanding is that in the 1980s and perhaps in the 1990s, too - Pascal and C were pretty much head-to-head as production languages. Is the ultimate demise of Pascal only due to Borland's neglection of Delphi? Or was there more of such bad luck; or perhaps something inherently wrong with Pascal (any hopes for its revival?). I hope it's not an open, unanswerable question. I'm interested in historical facts and observations one can back up, rather than likes and dislikes. I also failed to find a duplicate question, which actually surprised me somewhat.

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  • Differences between TypeScript and Dart

    - by margabit
    Microsoft recently unveiled Typescript, a new JavaScript-like programming language. Some time ago, I heard about Dart, a new programming language created by Google to solve problems related to Javascript like performance, scalability, etc.. The purpose of both new languages seem the same to me.. What do you think? Are the purposes of the languages the same? What are the real differences about them?

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  • How can I evaluate a candidate's knowledge of Html/CSS during an interview?

    - by webnoob
    I am trying to determine some good interview questions to assess the ability of people coming in for a Html/CSS job, however that topic is extremely broad, and I'm not sure what sort of questions I can ask to properly evaluate someone's HTML/CSS knowledge. What sort of questions can I ask to evaluate a candidate's Html/CSS abilities during an interview? Ideally I would like to ask few questions and then give them a real life scenario to combat.

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  • Do immutable objects and DDD go together?

    - by SnOrfus
    Consider a system that uses DDD (as well: any system that uses an ORM). The point of any system realistically, in nearly every use case, will be to manipulate those domain objects. Otherwise there's no real effect or purpose. Modifying an immutable object will cause it to generate a new record after the object is persisted which creates massive bloat in the datasource (unless you delete previous records after modifications). I can see the benefit of using immutable objects, but in this sense, I can't ever see a useful case for using immutable objects. Is this wrong?

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  • Is it customary for software companies to forbid code authors from taking credit for their work? do code authors have a say?

    - by J Smith
    The company I work for has decided that the source code for a set of tools they make available to customers is also going to be made available to those customers. Since I am the author of that source code, and since many source code files have my name written in them as part of class declaration documentation comments, I've been asked to remove author information from the source code files, even though the license headers at the beginning of each source file make it clear that the company is the owner of the code. Since I'm relatively new to this industry I was wondering whether it's considered typical for companies that decide to make their source code available to third parties to not allow the code authors to take some amount of credit for their work, even when it's clear that the code author is not the owner of the code. Am I right in assuming that I don't have a say on the matter?

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  • How do you avoid jumping to a solution when under pressure? [closed]

    - by GlenPeterson
    When under a particularly strict programming deadline (like an hour), if I panic at all, my tendency is to jump into coding without a real plan and hope I figure it out as I go along. Given enough time, this can work, but in an interview it's been pretty unsuccessful, if not downright counter-productive. I'm not always comfortable sitting there thinking while the clock ticks away. Is there a checklist or are there techniques to recognize when you understand the problem well enough to start coding? Maybe don't touch the keyboard for the first 5-10 minutes of the problem? At what point do you give up and code a brute-force solution with the hope of reasoning out a better solution later? A related follow-up question might be, "How do you ensure that you are solving the right problem?" Or "When is it most productive to think and design more vs. code some experiments to and figure out the design later?" EDIT: One close vote already, but I'm not sure why. I wrote this in the first person, but I doubt I'm the only programmer to ever choke in an interview. Here is a list of techniques for taking a math test and another for taking an oral exam. Maybe I'm not expressing myself well, but I'm asking if there is a similar list of techniques for handling a programming problem under pressure?

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  • GIS-based data visualization and maintenance tool

    - by Dave Jarvis
    Background Looking to leverage an existing GIS system for exploring organizational data. Architecture The following figure represents a high-level overview of the system's desired features: The most basic usage would be as follows: The user visits a web site. The system presents a map (having regions, cities, and buildings). The user drills-down on the map to a particular building. The system provides a basic CRUD interface. The user can view and modify information about personnel (e.g., their assigned teams), equipment (e.g., network appliances), applications, and the building itself (e.g., contact and phone numbers). Ideally, all the components should be open-source (or otherwise free). Problem This must be a small project that needs a quick (but functional) prototype, mostly to confirm whether or not such a system would be useful in the long term. Questions What software components would you use to quickly develop a working prototype? What open-source solutions already exist, if any? Ideas Here is what I am thinking: PostGIS - Define the regions, cities, and sites Google Maps - Display an interactive, clickable map geoJSON - Protocol between PostGIS and Google Maps Seam - CRUD interface Custom Development For example, this would entail: Installation and configuration Configure SSH for remote logins Subversion (or git) PostgreSQL PostGIS Java Tomcat Seam JasperReports Enter GIS information into PostGIS Aggregate data sources into PostgreSQL database Develop starting page for map interface Develop clickable Google Maps interface Develop summary reports Develop CRUD interface using Seam for data maintenance Surely something like this already exists? Thank you!

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  • Best method to organize/manage dependencies in the VCS within a large solution

    - by SnOrfus
    A simple scenario: 2 projects are in version control The application The test(s) A significant number of checkins are made to the application daily. CI builds and runs all of the automation nightly. In order to write and/or run tests you need to have built the application (to reference/load instrumented assemblies). Now, consider the application to be massive, such that building it is prohibitive in time (an entire day to compile). The obvious side effect here, is that once you've performed a build locally, it is immediately inconsistent with latest. For instance: If I were to sync with latest, and open up one of the test projects, it would not locally build until I built the application. This is the same when syncing to another branch/build/tag. So, in order to even start working, I need to wait a day to build the application locally, so that the assemblies could be loaded - and then those assemblies wouldn't be latest. How do you organize the repository or (ideally) your development environment such that you can continually develop tests against whatever the current build is, or a given specific build, while minimizing building the application as much as possible?

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  • Is comparing an OO compiler to a SQL compiler/optimizer valid?

    - by Brad
    I'm now doing a lot of SQL development at my new job where as before I was doing Object Oriented desktop app stuff. I keep running across very large scripts (thousands of lines) and wanting to refactor in some way. I am seeing that SQL is a different sort of beast and it's probably fine to have these big scripts for the most part but while explaining this to me people are also insisting that the whole idea of refactoring is bad. That stuff like the .NET compiler are actually burdened by refactored code and that a big wall of code is more efficient and better design than code designed for reuse, readability and scalability. The other argument is that OO compilers are almost dangerously inefficient and don't have efficient memory management or runs too many CPU instructions compared to older "simpler" compilers and compared to SQL. Are these valid complaints? Even if some compiler like a C compiler is modestly more "efficient" (whatever that means on this high of a level without seeing code) would you want to write applications in C over C# or Java? Is comparing an OO compiler to a SQL compiler/optimizer even valid?

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  • How and why are operating systems bootable from a USB?

    - by user114638
    I'm told to install ubuntu on my laptop for work in order to learn shell scripting. I've read the best way is to install ubuntu on a USB stick and partition my HDD. I'm curious how an OS is bootable from a USB stick? Is it literally just a small interface that can be put anywhere? This reminds me of a time I downloaded a game onto my USB stick, when I brought it to my friends house he told me it will run slow if I don't install it and only run it from the usb, is this different from running ubuntu from a usb? Will ubuntu be slow?

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  • Program error trying to generate Outlook 2013 email from Visual Basic 2010 [on hold]

    - by Dewayne Pinion
    I am using vb to send emails through outlook. Currently we have a mix of outlook versions at our office: 2010 and 2013 with a mix of 32 bit and 64 bit (a mess, I know). The code I have works well for Outlook 2010: Private Sub btnEmail_Click(sender As System.Object, e As System.EventArgs) Handles btnEmail.Click CreateMailItem() End Sub Private Sub CreateMailItem() Dim application As New Application Dim mailItem As Microsoft.Office.Interop.Outlook.MailItem = CType(application.CreateItem( _ Microsoft.Office.Interop.Outlook.OlItemType.olMailItem), Microsoft.Office.Interop.Outlook.MailItem) 'Me.a(Microsoft.Office.Interop.Outlook.OlItemType.olMailItem) mailItem.Subject = "This is the subject" mailItem.To = "[email protected]" mailItem.Body = "This is the message." mailItem.Importance = Microsoft.Office.Interop.Outlook.OlImportance.olImportanceLow mailItem.Display(True) End Sub However, I cannot get this to work for 2013. I have referenced the version 15 dll for 2013 and it seems to be backward compatible, but when I try to use the above code for 2013 (it is 64 bit) it says it cannot start Microsoft Outlook. A program error has occured. This is happening on the application Dim statement line. I have tried googling around but there doesn't seem to be much out there referencing 2013 but I feel that the problem here probably has more to do with 64 bit than the software version. Thank you for any suggestions!

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  • Difference between a pseudo code and algorithm?

    - by Vamsi Emani
    Technically, Is there a difference between these two words or can we use them interchangeably? Both of them more or less describe the logical sequence of steps that follow in solving a problem. ain't it? SO why do we actually use two such words if they are meant to talk of the same? Or, In case if they aren't synonymous words, What is it that differentiates them? In what contexts are we supposed to use the word pseudo code vs the word algorithm? Thanks.

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  • Nicest way to map rgb colors from html to led

    - by back_ache
    I have attached an rgb led to a color picker on a webpage and have hit the obvious problem that though the led is 8-bit like html the color rendition is very different so with the more subtle shades the led values for the color are wildly different to the html values. The brute-force method would be for me to have a lookup-table on the webserver to map the two sets of values but would ideally like to do it more elegantly Before I start listing all my 101 ideas for doing this I wondered if anyone else had come across the issue, the end-game would be to be able to abstract the color-rendition of different leds and make it available as a webservice (html value and device id in, led value out)

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  • How to display values from another website to an new html page?

    - by user3098728
    How to display the value in a new html file from different website? This an example field of values that need to display into new html file and I want to display the said values in the input box (Contract ID) of this page JSFiddle. I have 2 JS code that would display that values, but unfortunately its not working and I dont know how to display that value in html input box. Please help me. Thank you I want to display the said value in this input box: Here the JS file to read the values: function scanLapVerification() { try { var page_title = "Title"; var el = getElement(document, "class", "view-operator-verification-title", ""); if (!el || el.length == 0) return; if (el[0].innerText != page_title) return; var page_title = ''; var el = getElement(document, "class", "workflowActivityDetailPanel", ""); if (el && el.length > 0) { var eltr = getElement(el[0], "tag", "tr", ""); if (eltr && eltr.length > 0) { //Read Contract ID var contractId = { CI: { id: null } }; var con_id = null; for (var i = 0; i < eltr.length; i++) { tr_text = eltr[i].innerText; if (tr_text.substr(0, "Contract ID".length) == "Contract ID") con_id = "CI"; if (con_id && tr_text.substr(0, "Contract ID".length) == "Contract ID") { contractId[con_id].id = tr_text.substr("Contract ID".length + 1, tr_text.length - "Contract ID".length - 1); } } var contract_id = contractId.CI.id; return { content: "cid_check", con_id: con_id }; } return { status: "KO" }; } catch (e) { alert("Exception: scanLapVerification\n" + e.Description); return { status: "KO", message: e }; } }; And here's the 2nd JS that display to a new html page: function scanLapVerification() { chrome.tabs.sendRequest(tabLapVerification, { method: "scanLapVerification" }, function (response) { msgbox("receiveResponse: scanLapVerification " + jsonToString(response, "JSON")); //maintaining state in the background if (response.data.content == "cid_check") { //Popup window features var popupWindow = null; var name; var width = 550; var height = 200; var left = parseInt((screen.availWidth / 2) - (width / 2)); var top = parseInt((screen.availHeight / 2) - (height / 2)); var windowFeatures = "width=" + width + ",height=" + height + ",left=" + left + ",top=" + top + "screenX=" + left + ",screenY=" + top; //Input new address with popup window if (confirm("Does the client has new address?") == true) { popupWindow = window.open('/htmlname.htm', "title", windowFeatures + encodeURIComponent(response.data.contract_id)); popupWindow.focus(); } else { name = ""; } }); }

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  • javac -cp : cannot find symbol problem [migrated]

    - by LivingThing
    I have 3 classes CustomerAddress, Customer and CustomerMain. Customer has a import statement : import org.abc.customers.CustomerAddress; While CustomerMain has an import statement : import org.abc.customers.CustomerAddress; import org.abc.customers.Customer; The package for all of these classes are package org.abc.customer Now, this program works fine on eclipse but when i try to compile and run on cmd prompt it would not compile javac CustomerAddress.java compiles fine then since Customer depends on CustomerAddress i give javac -cp . Customer.java but the compiler complains error cannot find symbol CustomerAddress Thanks

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  • Builder Pattern: When to fail?

    - by skiwi
    When implementing the Builder Pattern, I often find myself confused with when to let building fail and I even manage to take different stands on the matter every few days. First some explanation: With failing early I mean that building an object should fail as soon as an invalid parameter is passed in. So inside the SomeObjectBuilder. With failing late I mean that building an object only can fail on the build() call that implicitely calls a constructor of the object to be built. Then some arguments: In favor of failing late: A builder class should be no more than a class that simply holds values. Moreover, it leads to less code duplication. In favor of failing early: A general approach in software programming is that you want to detect issues as early as possible and therefore the most logical place to check would be in the builder class' constructor, 'setters' and ultimately in the build method. What is the general concensus about this?

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  • Button postion not changing in View Controller. (Xcode)

    - by theCodeKing
    I have a View controller in xcode 6 (beta 5). I have put 4 buttons in it through the Object library in a .xib. But when i open the app in iOS simulator the buttons are the right y position but not correct x-position()they are on the right edge. No matter where i move them in the xib they only change y-position. I even moved them using the size inspector, but to no avail. How can i actually move them?

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  • Can I use a project code which has New BSD license but uses a GPL license library?

    - by Alok Kulkarni
    I want to use the ICSOpenVpn project source code in my commercial application. If we see the ICSOpenVpn project, it states that its license is New BSD but the libopenvpn.so library it uses is under GNU GPLv2 license. As per FAQ for version 2 of GNU GPL "If a library is released under the GPL (not the LGPL), does that mean that any program which uses it has to be under the GPL?" The answer says: "Yes, because the program as it is actually run includes the library." Also, how could ICSOpenVpn change the license to New BSD?

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  • controlling an object through another object ?

    - by Stefano Borini
    Today I've seen the following pattern: you have an object A and an object B. Object B accepts a pointer to A at its constructor. Once B is created, there's a method B.doCalc() that performs a calculation (internally using A's information). The result is obtained with method B.getResult(). In order to perform another calculation, A is modified, and B.doCalc() is called again. What is your opinion on this choice ? I would have designed it differently, but I want to hear your voice. Edit : note that my main objection is to modify A to have a different result from B, without touching B. Although similar, I think that just this discipline expresses a much better feeling of what's going on. Instead of a = new A a.whatever = 5 b = new B(a) b.doCalc() res = b.getResult() a.whatever = 6 b.doCalc() res = b.getResult() You get the a pointer object from b itself. a = new A a.whatever = 5 b = new B(a) b.doCalc() res = b.getResult() a = b.getAPointer() a.whatever = 6 b.doCalc() res = b.getResult() because it makes more explicit the fact that a is taken from b and then modified. I still don't like it, though...

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  • The worst anti-patterns you have came across.

    - by ?????????
    What are the worst anti-patterns you have came across in your career as a programmer? I'm mostly involved in java, although it is probably language-independent. I think the worst of it is what I call the main anti-pattern. It means program consisting of single, extremely big class (sometimes accompanied with a pair of little classes) which contains all logic. Typically with a big loop in which all business logic is contained, sometimes having tens of thousands of lines of code.

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  • PHP MYSQL loop to check if LicenseID Values are contained in mysql DB [closed]

    - by Jasper
    I have some troubles to find the right loop to check if some values are contained in mysql DB. I'm making a software and I want to add license ID. Each user has x keys to use. Now when the user start the client, it invokes a PHP page that check if the Key sent in the POST method is stored in DB or not. If that key isn't store than I need to check the number of his keys. If it's than X I'll ban him otherwise i add the new keys in the DB. I'm new with PHP and MYSQL. I wrote this code and I would know if I can improve it. <?php $user = POST METHOD $licenseID = POST METHOD $resultLic= mysql_query("SELECT id , idUser , idLicense FROM license WHERE idUser = '$user'") or die(mysql_error()); $resultNumber = mysql_num_rows($resultLic); $keyFound = '0'; // If keyfound is 1 the key is stored in DB while ($rows = mysql_fetch_array($resultLic,MYSQL_BOTH)) { //this loop check if the $licenseID is stored in DB or not for($i=0; $i< $resultNumber ; i++) { if($rows['idLicense'] === $licenseID) { //Just for the debug echo("License Found"); $keyFound = '1'; break; } //If key isn't in DB and there are less than 3 keys the new key will be store in DB if($keyfound == '0' && $resultNumber < 3) { mysql_query( Update users set ...Store $licenseID in Table) } // Else mean that the user want user another generated key (from the client) in the DB and i will be ban (It's wrote in TOS terms that they cant use the software on more than 3 different station) else { mysql_query( update users set ban ='1'.....etc ); } } ?> I know that this code seems really bad so i would know how i can improve it. Someone Could give me any advice? I choose to have 2 tables: users where all information about the users is, with fields id, username, password and another table license with fields id, idUsername, idLicense (the last one store license that the software generate)

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  • Benefits and features of different requirements-management systems and tools available?

    - by Gnark
    I am looking for a good comparision of different available professionial requirement managment tools. I am especially interested in the the features available within the different software solutions. Additionally to the "obvious" features I am looking for a proffesional Requirement Management System that supports for: multi-lingual customizable generation of documentation & history (graphs) search features (e.g. fulltext for comments), ordering, priorities version history bi-directional traceability of changes, artefacts, requirements, changes in requirements, etc. Any kind of integration of V-Model XT would be a really-nice-to-have-feature... Besides, I'd like to hear any personal motivated recommendations and/or experiences with different requirement management systems. Any input is highly appreciated. content consulted : similar question reqm tool with v-model nice, but too old paper (pdf) Tools Journal

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  • Benefits and features of different requirements-management systems and tools available?

    - by DevDevDave
    I am looking for a good comparision of different available professional requirement management tools. I am especially interested in the the features available within the different software solutions. Additionally to the "obvious" features I am looking for a proffesional Requirement Management System that supports for: multi-lingual customizable generation of documentation & history (graphs) search features (e.g. fulltext for comments), ordering, priorities version history bi-directional traceability of changes, artefacts, requirements, changes in requirements, etc. Any kind of integration of V-Model XT would be a really-nice-to-have-feature. Besides, I'd like to hear any personal motivated recommendations and/or experiences with different requirement management systems. Any input is highly appreciated. Content consulted: similar question reqm tool with v-model ToolsJournal.com nice, but too old paper (pdf)

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  • Using Qt to open external game appplication

    - by RandomGuy
    I have a windows qt application and I'm trying to open an external game, but I'm not having success. Application is in C:\games\Oni\Edition\ and is called Oni.exe, the code I'm using right now is the follow: void MainWindow::on_toolButton_clicked() { qint64 test=1; if(!QProcess::startDetached("Oni.exe",QStringList(),"C:\\games\\Oni\\Edition\\",&test)){ QMessageBox msgBox; msgBox.setText("Oni couln't be started!"); msgBox.exec(); } } I don't know if I'm forgetting something? The game runs fine if I double click it. Thanks.

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  • How to Properly Make use of Codeigniter's HMVC

    - by Branden Stilgar Sueper
    I have been having problems wrapping my brain around how to properly utilize the modular extension for Codeigniter. From what I understand, modules should be entirely independent of one another so I can work on one module and not have to worry about what module my teammate is working on. I am building a frontend and a backend to my site, and am having confusion about how I should structure my applications. The first part of my question is should I use the app root controllers to run modules, or should users go directly to the modules by urls? IE: in my welcome.php public function index() { $this->data['blog'] = Modules::run( 'blog' ); $this->data['main'] = Modules::run( 'random_image' ); $this->load->view('v_template', $this->data); } public function calendar() { $this->data['blog'] = Modules::run( 'blog' ); $this->data['main'] = Modules::run( 'calendar' ); $this->load->view('v_template', $this->data); } My second part of the question is should I create separate front/back end module folders -config -controllers welcome.php -admin admin.php -core -helpers -hooks -language -libraries -models -modules-back -dashboard -logged_in -login -register -upload_images -delete_images -modules-front -blog -calendar -random_image -search -views v_template.php -admin av_template.php Any help would be greatly appreciated.

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