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  • Is it good practice to use the XOR (^) operator in Java for boolean checks?

    - by Pete
    I personally like the 'exclusive or' operator when it makes sense in context of boolean checks because of its conciseness. I much prefer to write if (boolean1 ^ boolean2) { //do it } than if((boolean1 && !boolean2) || (boolean2 && !boolean1)) { //do it } but I often get confused looks (from other experienced java developers, not just the newbies), and sometimes comments about how it should only be used for bitwise operations. I'm curious as to the best practices others use around the '^' operator.

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  • Need a good way to store data in a DB from a table on a webpage that can have N columns.

    - by Abe Miessler
    Users need to be able to add a specific type of column to an otherwise static table on my web page and then save the information they enter in there to the database. I've been told that in reality they will almost never go over 5 columns but I would rather support N. The columns will all be of the same datatype. My first thought was to have an XML column with the values from all added columns in there but I was curious if anyone else had come up with a better solution. Suggestions?

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  • How does Cell Minute Tracker work?

    - by embedded
    It's been a mystery how does Cell Minute Tracker manage to fetch AT&T users data. Maybe someone here has the long waited answer. I'm really curious rather they got a confirmation to scrape user’s cellular report And how they can fire up multiple requests to AT&T site without being banned? I'm waiting for someone who could shed some light on this mystery Thanks link: http://www.uquery.com/apps/311637771-cell-minute-tracker-for-att

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  • Delay garbage collection?

    - by GeoffreyF67
    I'm using chrome (the dev version for my mac). I was looking at the timeline for my page loading and I saw that there is a 150ms delay due to some garbage collection taking place while loading the page. http://cl.ly/cce10619c698a5b276e2 It's the yellow line. I was curious if there's any way to stop this, delay it, whatever so I get the page to load faster? G-Man

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  • Trigger email on specific date

    - by Risho
    I have C# web application that I want it to send out an email on a certain date, such as if equipment isn't returned on the day it was due. Data is in MS SQL database. I've got all the email code already done, and I'm just curious how do I trigger this email, say after the COB on that particular day? Thanks, Eric

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  • Node.js A Good authentication module ? or whats the proper way to authenticate users?

    - by Mohamed Ahmed
    I'm learning Node.js and looking forward to create a simple web application which will be based on Express and I was thinking of something like creating user groups and each group has its own users and each group has its own permissions (Just like ACL in Cakephp) So can anyone recommend a good module or whatever to do so ? Also I'm a little curious about security and how these passwords are going to be saved and what type of encryption the passwords will be encrypted in. Thanks :)

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  • Why is "int + string" possible in statically-typed C# but not in dynamically-typed Python?

    - by Salvador Dali
    While studying C# I found it really strange, that dynamically typed Python will rise an error in the following code: i = 5 print i + " " whereas statically typed C# will normally proceed the similar code: int i = 5; Console.Write(i + " "); I would expect other way around (in python I would be able to do this without any casting, but C# would require me to cast int to string or string to int). Just to highlight, I am not asking what language is better, I am curious what was the reason behind implementing the language this way.

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  • Is it possible to use multiple languages in .NET resource files?

    - by Gabe Brown
    We’ve got an interesting requirement that we’ll want to support multiple languages at runtime since we’re a service. If a user talks to us using Japanese or English, we’ll want to respond in the appropriate language. FxCop likes us to store our strings in resource files, but I was curious to know if there was an integrated way to select resource string at runtime without having to do it manually. Bottom Line: We need to be able to support multiple languages in a single binary. :)

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  • vagrant box add: where does .box file get downloaded to?

    - by Calvin Cheng
    What actually happens to the .box file (which according to the docs is simply a vbox image in tar form, in a particular format) after the first command vagrant box add lucid32 http://files.vagrantup.com/lucid32.box is executed? I can't seem to find the filesystem location of lucid32.box after the download has successfully completed... I am aware it doesn't really matter as vagrant init lucid32 vagrant up vagrant ssh will get me into the vm irregardless. But I am curious where .box is located.

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  • How do large sites accomplish row-level permissions?

    - by JayD3e
    So I am making a small site using cakephp, and my ACL is set up so that every time a piece of content is created, an ACL rule is created to link the owner of the piece of content to the actual content. This allows each owner to edit/delete their own content. This method just seems so inefficient, because there is an equivalent amount of ACL rules as content in the database. I was curious, how do big sites, with millions of pieces of content, solve this problem?

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  • window.location alternatives in JavaScript

    - by MartyIX
    What is a standardized alternative to window.location.href function? I was checking on w3schools.com that it is implemented in all major browsers so there's no problem but I'm rather curious how to do that properly. From here is the statement that the function is not standardized: https://developer.mozilla.org/en/DOM/window.location Thanks!

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  • What is used instead of SendMessage and PostMessage in Java to handle inter-thread communications?

    - by Kieveli
    I'm from a WinAPI / C++ background, and I'm curious as to what the Java world uses in place of a threaded message loop in a worker thread to handle communications and interactions between threads. The idea is to use a message pump in both the worker thread, and the main thread, and have them posting messages back and forth. This solution is very WinAPI / C++ centric, and probably not the preferred method of achieving this goal in Java. What is the 'Java' way to do something like this?

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  • jQuery and PHP suggested answers

    - by Samir Ghobril
    Hey guys, there is a form where the user select some of his friends and I'm curious on how I can implement a list that searches simultaneously while the user is typing a friend's name and when he selects the name the name is written in the text box(jQuery). And if the user wants to select more than one friend, when I'm inserting the names in the database, how can I separate the names that are written in one input field?

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  • Having another static method as the entry point of the java program?

    - by GK
    As we all know java program will start executing from the main method of the class. So was curious to know that is there any other way by which we can make another static method as the entry point, that is can we override this property of the JVM to start with some other method than main? many of you will ask why do you want to do this? so want to make it clear that its just a curiosity to know about. And if it is there then it might help in many ways

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  • Best way to associate phone numbers with names

    - by Horace Loeb
    My application stores lots of its users friends' phone numbers. I'd like to allow users to associate names with these phone numbers, but I don't want to make users manually type in names (obviously). I'm curious what the best overall approach is here, as well as the best way to implement it Overall approach-wise, I imagine using Gmail / Yahoo / Windows Live contacts is best (the Facebook API doesn't let you access phone numbers), though the gems I've found for interacting with these contacts APIs (this and this) only give you access to the names and email addresses of each contact.

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  • How many registers in custom VM?

    - by DeadMG
    I'm designing a custom VM and am curious about how many registers I should use. Initially, I had 255, but I'm a little concerned about backing 255 pointers (a whole KB) on to the stack or heap every time I call a function, when most of them won't even be used. How many registers should I use?

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  • RESTful resource not found. 404 or 204? Jersey returns 204 on null being returned from handler.

    - by jr
    If you are looking for /Resource/Id and that resource does not exist, I had always though that 404 was the appropriate response. However, when returning "null" from a Jersey handler, I get back a "204 No Content". I can likely work with either one, but am curious to others thoughts on this. To answer my own next question. To get jersey to return 404 you must throw an exception. if (a == null) throw new WebApplicationException(404);

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  • Database structure for versioning and multiple languages

    - by phobia
    How can I solve the issue of content existing in multiple versions and multiple languages? My current structure: Each content can only have one active version in each language, and that's how I'm curious on how to best solve. Right now I have a column of the contentversions table, which means for each change of active version I have to run a update and set active=false on all version and then a update to set active=true for the piece of content in question.

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  • Real world examples of Rx

    - by theburningmonk
    I've been playing around with the Reactive Extension for a little while now, but mostly limited to handling/composing user driven events within a WPF frontend. It's such a powerful, new way of doing async programming, and I'm curious as to what other people are doing with it, and where do you think it might be able to improve the way we're currently doing things?

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