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  • What are guard methods/classes?

    - by Paul Sasik
    i just noticed the guard method/class mentioned in this question and i don't really get the concept from the answers. And alas, Jon Skeet's link to an MS site never loaded. A few quick Google searches seemed to yield only products, not software engineering concepts. Any explanation and/or samples would be appreciated. (Especially from the .Net side of things.)

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  • Go back to main window once secondView is loaded

    - by Ruthy
    Hi, I have a Tableview on AppDelegate That calls a SecondView (dvController) when DidSelectRowAtIndexPath using: [self.window addSubview:[dvController view]]; On SecondView I defined a button linked to IBAction that should go back to previous view. It works great but when row selected but, How could then go back to previous view if main one is AppDelegate? self.window addSubview:[?? view]]; Should be basic concept but I am quite new and unable to get the solution. Thanx :)

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  • Query two different Servers

    - by Felipe Fiali
    I have to query two different servers from a dynamically built query. It basically gets data from one server, treats it, and inserts it into another server. The only problem is I have to be sure it works for both situations: If both the source and destination databases are on the same server, and if they're not. I understand the concept of using Linked Servers in SQL Server, but I cannot think of a way to consider both alternatives, same server and different servers. A little help?

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  • What is the best way to bind PhoneGap events (like backbutton) to views in ember.js

    - by Fedor
    I'm playing with PhoneGap and emberjs (trying to build "proof of concept" mobile/HTML5 application based on ember.js). Ember.js itself works fine, but I haven't found any good way to "bind" PhoneGap events to views. For instance, I would like to handle backbutton event and remove a view on it. It would be nice to define behavior in view class and call document.addEventListener when instance of the view is appended and call document.removeEventListener when view instance removed.

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  • Custom Map using iPhone MapKit

    - by DHamrick
    I am attempting to use MapKit to create a custom map (similar to this concept http://mapwow.com/) using an image instead of the google maps image. This is so we can include the gps functionality and the pins functionality. I have looked in the documentation and there does not appear to be a standard way of doing it. Is there a way to do this using MapKit or has someone found a way to achieve something similar?

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  • ASP.NET MVC, How to get the page content before render

    - by user361993
    In ASP.NET MVC, how to get the page content before render, we know in Web form app, we can override the method protected override void Render(HtmlTextWriter writer) to get the page content before render. but in MVC there are no event concept, so how we can get the page content. the purpose for that is to emphasize(wrap <strong> tag) the keywords before the page rendered. I'd appreciate for any advice. Thank you.

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  • Why is it still so hard to write software?

    - by nornagon
    Writing software, I find, is composed of two parts: the Idea, and the Implementation. The Idea is about thinking: "I have this problem; how do I solve it?" and further, "how do I solve it elegantly?" The answers to these questions are obtainable by thinking about algorithms and architecture. The ideas come partially through analysis and partially through insight and intuition. The Idea is usually the easy part. You talk to your friends and co-workers and you nut it out in a meeting or over coffee. It takes an hour or two, plus revisions as you implement and find new problems. The Implementation phase of software development is so difficult that we joke about it. "Oh," we say, "the rest is a Simple Matter of Code." Because it should be simple, but it never is. We used to write our code on punch cards, and that was hard: mistakes were very difficult to spot, so we had to spend extra effort making sure every line was perfect. Then we had serial terminals: we could see all our code at once, search through it, organise it hierarchically and create things abstracted from raw machine code. First we had assemblers, one level up from machine code. Mnemonics freed us from remembering the machine code. Then we had compilers, which freed us from remembering the instructions. We had virtual machines, which let us step away from machine-specific details. And now we have advanced tools like Eclipse and Xcode that perform analysis on our code to help us write code faster and avoid common pitfalls. But writing code is still hard. Writing code is about understanding large, complex systems, and tools we have today simply don't go very far to help us with that. When I click "find all references" in Eclipse, I get a list of them at the bottom of the window. I click on one, and I'm torn away from what I was looking at, forced to context switch. Java architecture is usually several levels deep, so I have to switch and switch and switch until I find what I'm really looking for -- by which time I've forgotten where I came from. And I do that all day until I've understood a system. It's taxing mentally, and Eclipse doesn't do much that couldn't be done in 1985 with grep, except eat hundreds of megs of RAM. Writing code has barely changed since we were staring at amber on black. We have the theoretical groundwork for much more advanced tools, tools that actually work to help us comprehend and extend the complex systems we work with every day. So why is writing code still so hard?

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  • Time series in R

    - by Christian Stade-Schuldt
    Hi, I am tracking my body weight in a spread sheet but I want to improve the experience by using R. I was trying to find some information about time series analysis in R but I was not succesful. The data I have here is in the following format: date - weight - body-fat-percentage - water-percentage e.g. 10/08/09 - 84.30 - 18.20 - 55.3 What I want to do plot weight and exponential moving average against time How can I achieve that?

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  • Built-in precedence in Expression Trees for math?

    - by jdk
    I'm unable to find the .NET FCL built-in concept of precedence to leverage while constructing Expression Trees. Ref System.Linq.Expressions Namespace. Is this something that must be handled manually in code, or is it somehow implicit and I'm not recognizing it (e.g. maybe through helper methods or classes)? I want to apply it to math operations to ensure 3 + 5 * 10 results in 53 instead of 80.

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  • URL Generation Technique with PHP

    - by harigm
    I have a build a web portal based on the Cricket concept, I have build a Custom based CMS where I can upload the News for the site Once I upload the news, the URL Will be like this http://cricandcric.com/news/news.php?id=841&An-emotional-moment:-Dhoni.html But I am trying to have the above Url as follows (some thing like this) http://cricandcric.com/news/An-emotional-moment:-Dhoni.html Or similar to Stackoverflow.com, Can any one please help me how can i build that? Do I need to rewrite the URL ?

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  • data format encoding and etc

    - by hguser
    Hi: I Suddenly found that I have no idea about the concept of data format and the encoding. For exmpale, what is the differences about the ascii/binary/base64/text-xml ? For a real case, I am working with a web service whose parameter I have to define,however one of the parameter should be ascii,another is binary and the last is netcdf. So,how to define it? ALso I wonder the ascii needed parameter can be a .txt or .dat ?

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  • How does a portable Thread Specific Storage Mechanism's Naming Scheme Generate Thread Relative Uniqu

    - by Hassan Syed
    A portable thread specific storage reference/identity mechanism, of which boost/thread/tss.hpp is an instance, needs a way to generate a unique keys for itself. This key is unique in the scope of a thread, and is subsequently used to retrieve the object it references. This mechanism is used in code written in a thread neutral manner. Since boost is a portable example of this concept, how specifically does such a mechanism work ?

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  • Windows Login Integration

    - by Dusty Roberts
    Hi Peeps. I am building facial recognition software for a certain purpose, however, as a spin-off i would like to use that same software / concept, to automatically recognize me when i sit in front of the PC, and log me in. recognition is handled.. however, i need to incorporate this into windows, the same way fingerprint logins work. where can i go to get some more info on the doing this?

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  • Use Windbg find argumet passed to a COM+ method

    - by G33kKahuna
    Generated a debug diagnostic dump file for a COM+ application. Upon analysis look like threads deadlocks at line OLE32!SwitchSTA. My symbol path is pointing to msdl.microsoft.com/download/symbols. Is there way to know what arguments were passed to this method? In general, how does one use Windbg to find the input argument value to the method call? thanks in advance

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  • Going from a math career to a cs career: how to do it?

    - by Joseph
    Hey, I'm looking for some advice on how to successfully make the transition from mathematics to CS. My academic background is in mathematics (BS and MSc), and I've taken loads of math courses as well. You name it, and I took it: Measure Theory, Algebra, PDES, Manifolds, Complex Analysis, etc. I progressed quite far along this track, and at one point, I thought I would be a professional mathematician...But around the time I was finishing my MSc, I really got sick of it. Studying very abstract mathematics was fun, but it really lost it's appeal to me. Outside of a couple hundred people, I'm not sure if anybody would understand my research. I did not want to be 60 years old and say that my only contribution to the world consisted of published papers. Anyways, I've been an off and on hobbyist programmer since 2002. I've programmed in C and Java (just small projects), and I really started to be drawn to the area as time passed. There's a real appeal to CS work because, well, it actually means something to other people out there! I enjoy all parts of it: designing webpages (a real artistic appeal). On the other end, I do enjoy toying with compilers and more nitty-gritty stuff as well. Suffice to say, I have broad interests out there. Anyways, I know it's a bit late, but I was wondering if there were other folks out there who made the change, and if so, how I could do so. I know I have some fairly big gaps to fill in terms of data structures, lack of internship experience, etc. But I really would like to make this work. So my question is simply: How can I make the switch from math to CS? To pay the bills, I'll be doing financial analysis for a company, but I'd like to eventually transition into a developer type position. I've been reading "Algorithm Design" by Tardos and doing all the problems. It's not hard to make progress since the problems are far more concrete than the stuff I've been doing the past six years. I feel I can make fairly rapid progress in picking up all the materials from data structures, etc. but none of it can substitute the past several years I've lost. Anyways, I'm eager to learn but would love some advice/concrete direction. Thanks, Joseph

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  • ReSharper-like addon for NetBeans

    - by Ondrej Slinták
    Hello, is there any ReSharper-like addon for NetBeans (preferably 6.8)? I'm using NetBeans for PHP. I need following features: add some kind of code analysis add some intelligent refactoring interface enhance current code completion system add more options to code highlighting Currently I'm using multiple external tools, which aren't exactly user-friendly and I'd like to, preferably, have it all in one tool. Perhaps some other PHP IDE have something like this. EDIT: Bit more details in my answer to Jani Hartikainen.

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  • Slow performance of System.Math library in .NET4/VS2010

    - by Niranjan
    My application compiled in .NET 4 seems to be performing really slow compared to .NET 3.5. When I did the performance analysis, I found out that the System.Math libraries in VS2010/.NET 4 have slowed down considerably. Any explanation to this? Has anyone else come across this or am I the only one seeing this? Thanks, Niranjan

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  • What is your "favorite" anti pattern?

    - by Omar Kooheji
    By favorite I mean the one that gets your goat the most, not the one you enjoy using the most. I'm fairly new to the concept of anti patterns and I'd like a list of do not do's. An explanation of why it's an antipattern and what problems it causes would be good too.

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  • Table Partitioning

    - by Ankur Gahlot
    How advantageous is it to use partitioning of tables as compared to normal approach ? Is there a sort of sample case or detailed comparative analysis that could statistically ( i know this is too strong a word, but it would really help if it is illustrated by some numbers ) emphasize on the utility of the process. Thanks, Ankur

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  • Unit testing in python?

    - by yossi.ittach
    Hey - I'm new to python , and I'm having a hard time grasping the concept of Unit testing in python. I'm coming from Java - so unit testing makes sense because - well , there you actually have a unit - A Class. But a Python class is not necessarily the same as a Java class , and the way I use Python - as a scripting language - is more functional then OOP - So what do you "unit test" in Python ? A flow? Thanks!

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