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  • Complicated programming and math tasks online. Any?

    - by Tom
    Maybe it is not very thematic question in here, but I guess it will be interesting not only to me. I hope. So, I just want to get some cool tasks to do using programming languages or just pen and sheet of paper. I guess it can lead to improving my ability to do better code (more optimal I mean.) Do you know any websites where I can find it? Thanks.

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  • how to bind the same vector multiple times using R?

    - by hendrik
    question: how can i bind the same vector, lets say o=c(1,2,3,4) mutiple times to get a matrix like o=array(c(1,2,3,4,1,2,3,4,1,2,3,4), dim(c(4,3)) o [,1] [,2] [,3] [1,] 1 1 1 [2,] 2 2 2 [3,] 3 3 3 [4,] 4 4 4 in a nicer way then: o=cbind(o,o,o) and maybe more generalized (dublicate()?? I need this to specifiy colors for elements in textplot() thx a lot

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  • Compare two times without regard to Date associated - Ruby

    - by H55nick
    I am trying to find the difference in time (without days/years/months) of two different days. Example: #ruby >1.9 time1 = Time.now - 1.day time2 = Time.now #code to make changes #test: time1 == time2 # TRUE My solution: time1 = time1.strftime("%h:%m").to_time time2 = time2.strftime("%h:%m").to_time #test time1 == time2 #True #passes I was wondering if there was a better way of doing this? Maybe we could keep the Date the same as time1/time2?

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  • IE Positioning Help.

    - by _henry
    I’m currently working on this theme : http://tf.ffffffive.com/fancy/ I just need a few pointers on how to get it working in IE6 and IE7 . -The positioning is a bit off. -If you guys have a helpful blog post of maybe give me a hand with some CSS coding I would really appreciate it. Also the Javascript scrolling effect isn't working correctly due to the positioning. Any tips would be appreciated. Thanks, Henry

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  • Force content generated by javascript to reveal itself.

    - by atwellpub
    Hello, I'm generating some content through an API, accessed by javascript, and I cannot grab the source code of what is plainly displayed, post-load, on the browser. I can highlight the text and view the source of selected text (which is a firefox feature), but I will be using CURL to capture the data automatically with php... How can I capture the data? Is there a way to update the source(maybe through a DOM update) so it displays some how? Any help is appreciated.

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  • .htaccess or PHP protection code against multiple speedy requests

    - by Phil Jackson
    Hi, I am looking for ideas for how I can stop external scripts connecting with my site. I'm looking for the same kind of idea behind Google. As in if a certain amount of requests are made per a certain amount of time then block the IP address or something. I thought there maybe a htaccess solution if not, I will write a PHP one. Any ideas or links to existing methods or scripts is much appreciated. Regards Phil

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  • nsmutablearray and saving to file

    - by Amir
    hello all, I have class named Shop that contain data members (NSString , NSInteger and nsmutablearray that contain another class(that have also NSString and NSInteger) Now if i use nsmutablearray to hold alist of Shops what is the best way to save the list to file and load it later? again the class Shop contain data memeber that is another class both of the classes have NSString and NSinteger (maybe also NSdata and NSdate) i heard somthing about archiver?? thanks.

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  • please help me to solve problem

    - by davit-datuashvili
    first of all this is not homework and nobody tag it as homewrok i did not understand this porblem can anybody explain me?this is not english problem it is just misunderstanding what problem say Consider the problem of neatly printing a paragraph on a printer. The input text is a sequence of n words of lengths l1 , l2 , . . . , ln , measured in characters. We want to print this paragraph neatly on a number of lines that hold a maximum of M characters each. Our criterion of “neatness” is as follows. If a given line contains words i through j , where i = j , and we leave exactly one space between words, the number of extra space characters at the end of the line is M - j + i -(k=i,k< j,k++) lk , which must be nonnegative so that the words fit on the line. We wish to minimize the sum, over all lines except the last, of the cubes of the numbers of extra space characters at the ends of lines. Give a dynamic-programming algorithm to print a paragraph of n words neatly on a printer. Analyze the running time and space requirements of your algorithm.

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  • JFileChooser select directory but show files

    - by Jeff Storey
    I feel like there should be a simple way to do this but I can't figure it out. I have a JFileChooser that allows the user to select directories. I want to show all the files in the directories to give the user some context, but only directories should be accepted as selections (maybe the Open button would be disabled when a file is selected). Is there an easy way of doing this?

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  • What's the big deal with brute force on hashes like MD5

    - by Jan Kuboschek
    I just spent some time reading http://stackoverflow.com/questions/2768248/is-md5-really-that-bad (I highly recommend!). In it, it talks about hash collisions. Maybe I'm missing something here, but can't you just encrypt your password using, say, MD5 and then, say, SHA-1 (or any other, doesn't matter.) Wouldn't this increase the processing power required to brute-force the hash and reduce the possibility of collision?

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  • jQuery to bind input value to span or div???

    - by Stefan
    Please excuse me if this is a newbie question. I am new to this. I would like that a user fill out a form with their info and, just before clicking submit, there to be a summary of details area where they confirm their details are correctly entered. So is it possible for me to "bind" specific inputs to specific spans or divs and as they type (or maybe onBlur?) the span would reflect what is written in the respective input???

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  • Best way to password protect a site? .htacess

    - by Mike Lawsom
    I created/edited a .htaccess file and I got my site password protected fine. Question though: Is there such thing as a URL key? Maybe I'm wording that incorrectly, but I would like to keep my site hidden, but be able to send out a specific URL that can view the site. What's the best way to accomplish this? Thanks in advance.

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  • How To Send thousands of javaMails simultaneously ?

    - by ylazez
    greetings all i am building a web app(smth like a forums) that will need to send thousands of emails simultaneously i think that it would be such a big load on the app to handle sending the emails, so i want to use another service or framework to handle sending the emails in asynchronous way so that there will be no load on the app, maybe JMS , i don't know, please suggest me a good solution.

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  • Split a string by two characters

    - by David
    Hi, Firstable i want to match if a string has the following format: $abc #xyz or $abc .xyz. The abc and xyz mean only alphanumeric string. If it's matched then i need to extract the first $abc and the last #xyz, all that using pure javascript and maybe regex. The pattern is in the following order: Dollar Sign Unlimited alphanumeric string space a hash or point Unlimited alphanumeric string Thanks in advance for any help.

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  • C#: How to replace "-" with " -" only when it's not preceded by "e"?

    - by MaDDoX
    I imagine I should use Regex for that but I still scratch my head a lot about it (and the only similar question I found wasn't exactly my case) so I decided to ask for help. This is the input and expected output: Input: "c-0.68219,-0.0478 -1.01455-0.0441 0.2321e-4,0.43212" Output:"c -0.68219,-0.0478 -1.01455 -0.0441 0.2321e-4,0.43212" Basically I need either commas or spaces as value separators, but I can't break the exponential index (e-4). Maybe do two successive replacements?

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  • C++: Chr() and unichr() equivalent?

    - by alex
    I could have sworn I used a chr() function 40 minutes ago but can't find the file. I know it can go up to 256 so I use this: std::string chars = ""; chars += (char) 42; //etc So that's alright, but I really want to access unicode characters. Can I do (w_char) 512? Or maybe something just like the unichr() function in python, I just can't find a way to access any of those characters.

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  • jQuery ajax.load div, then have parent container access property

    - by Brett
    So I have a tabbed ui "form", each tab is quiet complicated so it is loaded via the .load('item.html'); command. All good, when the user clicks to a different tab, I want to read a property, maybe execute a function from within the ajax loaded div. What is the best way to get to these properties and methods from outsite the ajax loaded div?

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  • using generic and for each loop in jsp

    - by mawia
    I am developing a web application. I am using Eclipse as IDE. I was using generic and for each loop, both being feature of java 1.5, and it compiled quite fine when used in backend means in simple java classes. But when I'm using these on jsp, jsp is failing to compile with error showing generic and for each as culprit. Can you shed some light on this? Maybe I am at fault with Eclipse settings?

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  • How to make the swf load after all the images and text loaded?

    - by Jay
    My CMS system allow people to post some swf on the homepage, however, sometime there is video which is included in swf, not two files swf+flv. When the swf video load, it near used up the bandwidth and so the page seems not response for a while ... Can I use jQuery to control all the swf in a page that they load after the others done or maybe just load it after 3s or what? Thanks!!

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  • Strongest cipher available to use with C/C++ ?

    - by George0x77
    I am just wondering if you are supposed to write a sort of really secure application with data being transmitted over insecure networks, what kind of encryption algorithm will you use it in order to make it safe ? I know several c++ libraries for encryption providing nice functions with different algorithms, but i'm not quite sure which cipher to use - AES, DES, RSA, Blowfish or maybe something more different ? Please provide your ideas and suggestions. Thank you.

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