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  • Is it standard behavior for this code to throw a NullPointerException?

    - by Eric
    I've had a big problem in some library code, which I've pinned down to a single statement: System.out.println((String) null); Ok, the code doesn't actually look like that, but it certainly calls println with a null argument. Doing this causes my whole applicaio to throw an unexpected NullPointerException. In general, should println throw this exception under that circumstance, or is this non-standard behavior due to a poor implementation of the out instance?

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  • Using eachDirMatch to skip .svn folders

    - by algernon
    I'm writing a program which needs to traverse a set of directories. Tried to use the following code: file.eachDirMatch(/.*[^.svn]/){ //some code here } But that ended up match none of my directories. I realize this boils down figuring out the right regex hang head in shame but even after revisiting some Java Regular Expression documentation I thought this should work.

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  • acts_as_tree and to_json or from_json

    - by Sohan
    Hello: Does anyone have a solution to convert an acts_as_tree model to json that includes all its nodes? I trued using :include=:children, but that only goes down to one single level. Any idea how to iterate the whole tree?

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  • UIScrollView not scrolling...

    - by Mark
    I have a UIScrollView which contains many UIImageView's UILabel's etc... the labels are well longer that the UIScrollView, but when I run the app, I cannot click and scroll down... Why might this be? Thanks

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  • What's the best practice in case something goes wrong in Perl code?

    - by Geo
    I saw code which works like this: do_something($param) || warn "something went wrong\n"; and I also saw code like this: eval { do_something_else($param); }; if($@) { warn "something went wrong\n"; } Should I use eval/die in all my subroutines? Should I write all my code based on stuff returned from subroutines? Isn't eval'ing the code ( over and over ) gonna slow me down?

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  • wordpress adnimistration page

    - by michael
    anyone know of a site that explains how wordpress created its appearances in wordpress (on the backend) i like how the navigation was created and i am trying to drill down to see what makes it tick but its a heck of a mess of code. has anyone launched anything online that you know of explaining how these peices were made? maybe something cleaner. thnx

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  • show date and time in php

    - by abhishek
    0 down vote hi, I have problem in showing $date="2011-02-10 15:26:20"; in the format of Thursday 10th of February 2011 03:26:20 PM in php. i know there is one date function in php and can be done in one line for example: but via this it will flash today date or so. i want to do it when user check any date and want that date in the format which i mention earlier. please revert me back as soon as posib.... thanks

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  • javascript error causes page reload?

    - by seanlinmt
    I have been getting some weird page refresh in deployment and I can't seem to find the cause of it or replicate it in development. Is there a way for a javascript error or exception to cause a page reload? Or some tips to help me narrow down the cause?

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  • jquery: iterating through various ul's list-items?

    - by user239831
    hey guys, someone already helped me solving the following problem: i wanted to iterate with my up and down arrows through list-items. http://jsfiddle.net/zBjrS/1/ in this example i only had one UL and wanted to navigate through its list-items. meannwhile i have multiple ul's underneath each other and want to navigate seemlessly through all of them as if there were only one UL. http://jsfiddle.net/zBjrS/2/ any idea how i could do that? thank you

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  • Highlight table view cells when user drags across rows

    - by chronos
    I have a grouped table view that does not need to scroll. I'd like each cell to highlight as the user moves their finger down the screen and call didSelectRowAtIndexPath on release. This behaviour can be seen done by apple in 'settings mail add account'? I can't seem to replicate it myself, all I can get is the default, where the cell deselects as soon as the user moves their finger.

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  • jQuery animate Toggle

    - by danit
    Here is my code so far: $(document).ready(function(){ $("#slider").click(function() { $("#insight").animate({ top: "25px",}, 300, function() { $("#insight").animate({ top: "89px",}, 300); }); }); }); I want this to act like .toggle(), where by on click #div1 slides up to top:25px and then stops, but when clicked again slides down to top:89px. Can anyone expand the function above to achieve this?

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  • Deleteing cache upon submit

    - by user279521
    I have an asp.net web form (c#, .NET framework 3.5) that returns to itself after the user clicks the submit button. I think that some values of the form are cached (some controls in a "placeholder" are out of position... meaning they have moved slightly up or down on the web form). How can I delete the cache after user clicks submit, and ensure that the form reloads fresh, after submit?

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  • How to track how many times an iPhone app is opened?

    - by Jason
    I am building an iphone app and would like to keep track of how many times it has been opened so that I can prompt the user to do certain actions after it has been opened X number of times. I have thought about storing a variable in Core Data which I update every time it is opened, but this seems like a waste since it is a singleton data, not multiple instances of an object. What is the best way to store data like this and access it without slowing down the app opening time?

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  • Fading Element on Scroll

    - by user179846
    I'm curious how I can create a DIV (or anything really) that I can fade (or change opacity of) when a user scrolls down the page. This DIV would sit at the top of the page, but only be clearly visible when at the very top of the page. Additionally, it would be ideal if I I could have this element fade back in onmouseover, regardless of the current scrolled position on the page.

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  • Java checking connection via socket continuously

    - by Onca
    I'm developing a multiclient-server program with Java based on GUI and database. The demand regarding the program from the client side is to make sure all the time that there is a connection to the server, and if the connection is lost (server goes down/problem with socket or stream) it should be notified. In other words I need a solution for continuously checking the connection to the server. What is the best way to do that ?

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