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  • Python 3 order of testing undetermined

    - by user578598
    string='a' p=0 while (p <len(string)) & (string[p]!='c') : p +=1 print ('the end but the process already died ') while (p <1) & (string[p]!='c') : IndexError: string index out of range I want to test a condition up to the end of a string (example string length=1) why are both parts of the and executed is the condition is already false! as long as p < len(string). the second part does not even need executing. if it does a lot of performance can be lost

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  • Why should "miter" joints be slower than others?

    - by Hanno Fietz
    I'm having a graphics problem on drawing lines in Flash Player, where two lines drawn on top of each other with different thickness don't align properly if I use any other JointStyle than MITER. For pictures of the effect, and for the graphics oriented part of the question, see my post over on doctype. However, there's also a second angle on this problem, which is: why should drawing the "mitered" joints be so much slower than others? This seems to be a problem since at least FP 8, but I couldn't find any detailed info on what the problem might be. Is this just an ordinary bug that didn't get fixed yet, or is there something inherently slower about drawing these joints? For example, they seem to have something to do with square roots, but I seriously lack understanding of what this joint style thing is all about, technically. It just looks like some minor detail a graphic designer might worry about. I'm asking because I'm wondering if I can do something to mitergate, er, mitigate, the problem.

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  • Arry of pointers in objective c using NSArray

    - by Amir
    Hello, I am writting program for my iphone and have a qestion. lets say i have class named my_obj class my_obj { NSString *name; NSinteger *id; NSinteger *foo; NSString *boo; } now i allocate 100 objects from type my_obj and insert them to array from type NSArray. then i want to sort the Array in two different ways. one by the name and the second by the id. i want to allocate another two arrays from type NSArray *arraySortByName *arraySortById what i need to do if i just want the sorted arrays to be referenced to the original array so i will get two sorted arrays that point to the original array (that didnt changed!) i other word i dont want to allocate another 100 objects to each sorted array.

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  • Why are mainframes still around?

    - by ThaDon
    It's a question you've probably asked or been asked several times. What's so great about Mainframes? The answer you've probably been given is "they are fast" "normal computers can't process as many 'transactions' per second as they do". Jeese, I mean it's not like Google is running a bunch of Mainframes and look how many transactions/sec they do! The question here really is "why?". When I ask this question to the mainframe devs I know, they can't answer, they simply restate "It's fast". With the advent of Cloud Computing, I can't imagine mainframes being able to compete both cost-wise and mindshare-wise (aren't all the Cobol devs going to retire at some point, or will offshore just pickup the slack?). And yet, I know a few companies that still pump out net-new Cobol/Mainframe apps, even for things we could do easily in say .NET and Java. Anyone have a real good answer as to why "The Mainframe is faster", or can point me to some good articles relating to the topic?

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  • How to make this jpeg compression faster

    - by Richard Knop
    I am using OpenCV to compress binary images from a camera: vector<int> p; p.push_back(CV_IMWRITE_JPEG_QUALITY); p.push_back(75); // JPG quality vector<unsigned char> jpegBuf; cv::imencode(".jpg", fIplImageHeader, jpegBuf, p); The code above compresses a binary RGB image stored in fIplImageHeader to a JPEG image. For a 640*480 image it takes about 0.25 seconds to execute the five lines above. Is there any way I could make it faster? I really need to repeat the compression more than 4 times a second.

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  • Assign the results of a stored procedure into a variable in another stored procedure

    - by RHPT
    The title of this question is a bit misleading, but I couldn't summarize this very well. I have two stored procedures. The first stored procedure (s_proc1) calls a second stored procedure (s_proc2). I want to assign the value returned from s_proc2 to a variable in s_proc1. Currently, I'm calling s_proc2 (inside s_proc1) in this manner: EXEC s_proc2 @SiteID, @count = @PagingCount OUTPUT s_proc2 contains a dynamic query statement (for reasons I will not outline here). CREATE dbo.s_proc2 ( @siteID int, @count int OUTPUT ) AS DECLARE @sSQL nvarchar(100) DECLARE @xCount int SELECT @sSQL = 'SELECT COUNT(ID) FROM Authors' EXEC sp_ExecuteSQL @sSQL, N'@xCount int output', @xCount output SET @count = @xCount RETURN @count Will this result in @PagingCount having the value of @count? I ask because the result I am getting from s_proc1 is wonky. In fact, what I do get is two results. The first being @count, then the result of s_proc1 (which is incorrect). So, it makes me wonder if @PagingCount isn't being set properly. Thank you.

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  • Inconsistent Session data from IE - cached sessions???

    - by pedalpete
    I'm trying to prevent some basic click-fraud on my site, and am building links based on session time data. Everything works in FF, but in IE the information I'm storing in the session is somehow being changed. When I load up the main page, I set my session variables like this session_start(); $_SESSION['time']=$time(); I'm out putting the session value into the page, so I get something like 1275512393. When the user clicks on a link, I send an ajax request, and that page is returning the session which I am putting into an alert. session_start(); echo $_SESSION['time']; die(); The alert is returning 1275512422. Only in IE is the $_SESSION['time'] being returned different from the original $_SESSION['time'] It doesn't appear that this is a caching issue, as the times are always VERY near each other, and the second one is always after the first, but I'm not positive.

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  • SSL Certificated Validity

    - by Haluk
    Hi, I'm using an SSL certificate from geotrust. I just ordered and installed it this weekend. However when I try to access my website using https, firefox (and the other browsers as well) the browser warns that the certificate expired a few days ago. I guess there could be two reasons: I made a mistake during the installation of the certificate Geotrust did not sign the certificate properly. First I want to rule out the second reason considering my browser tells me the certificate expired a few days ago. This does not make sense at all. Is there a way to extract the expiration date from the certificate? Thanks!

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  • c: memory allocation (what's going on)

    - by facha
    Hi, everyone Please take a look at this piece of code. I'm allocating one byte for the first variable and another byte for the second one. However, it seems like the compiler allocates more (or I'm missing something). The program outputs both strings, even though their length is more the one byte. void main() { char* some1 = malloc(1); sprintf(some1,"cool"); char* some2 = malloc(1); sprintf(some2,"face"); printf("%s ",some1); printf("%s\n",some2); } Please, could anyone spot some light on what's going on when memory is being allocated.

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  • How to generate random strings that match a given regexp?

    - by Pies
    Duplicate: Random string that matches a regexp No, it isn't. I'm looking for an easy and universal method, one that I could actually implement. That's far more difficult than randomly generating passwords. I want to create an application that takes a regular expression, and shows 10 randomly generated strings that match that expression. It's supposed to help people better understand their regexps, and to decide i.e. if they're secure enough for validation purposes. Does anyone know of an easy way to do that? One obvious solution would be to write (or steal) a regexp parser, but that seems really over my head. I repeat, I'm looking for an easy and universal way to do that. Edit: Brute force approach is out of the question. Assuming the random strings would just be [a-z0-9]{10} and 1 million iterations per second, it would take 65 years to iterate trough the space of all 10-char strings.

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  • Detect response from Modem?

    - by GoodBoyNYC
    I'm working with a Teltonika G10 GSM modem and wrote up a basic program to send out SMS. I put a 1.5 second timer between each AT command to allow the modem to simulate the wait for the "OK" from the modem. This works for now but I'd rather use a branching statement wait for an actual response such as "OK" or "ERROR" rather than using a timer. SerialPort1.Write("AT+CMGD=1,4" & vbCrLf) Thread.Sleep(1250) SerialPort1.Write("AT+CMGF=1" & vbCrLf) Thread.Sleep(1250) SerialPort1.Write("AT+CMGS=" & Chr(34) & "3475558223" & Chr(34) & vbCrLf) Thread.Sleep(1250) SerialPort1.Write(":|" & Chr(26))

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  • Fetching a result twice with deferend name

    - by user1799842
    I have 1 table with tasks named opentask:columns: id,title,description,expires,creator_id,creator_name, executer_id, executer_name, priority_id, status_id1 table with users named user: with columns: user_id, username What I want is to create a query where there will be all columns from opentask table where the executer_id will be equal to the user_id of user table AND the creator_id will be equal to the user_id again. This creates a confusion because the first equality excludes the second.So I need somehow to create a query where I will include the usernames for the executer with something like where "opentask.executer_id=user_user_id" and at the same time I will include the username again (as a differend name?) for the creator with something like "where opentask.executer_id=user_user_id"So I try this, which of course I know that is missing something, can you help? SELECT DISTINCT id, title, description, expires, creator_id, executer_id, oc_opentask.priority_id, oc_opentask.status_id, priority_name, status_name, user_id, username, (SELECT username FROM oc_opentask, oc_user WHERE oc_opentask.creator_id=oc_user.user_id) AS username2 FROM oc_opentask, oc_opentask_priority, oc_user, oc_opentask_status WHERE oc_opentask.priority_id=oc_opentask_priority.priority_id AND oc_opentask.executer_id=oc_user.user_id AND oc_opentask.status_id=oc_opentask_status.status_id ORDER BY oc_opentask.expires DESC

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  • What Should be the Structure of a C++ Project?

    - by Ell
    I have recently started learning C++ and coming from a Ruby environment I have found it very hard to structure a project in a way that it still compiles correctly, I have been using Code::Blocks which is brilliant but a downside is that when I add a new header file or c++ source file, it will generate some code and even though it is only a mere 3 or 4 lines, I do not know what these lines do. First of all I would like to ask this question: What do these lines do? #ifndef TEXTGAME_H_INCLUDED #define TEXTGAME_H_INCLUDED #endif // TEXTGAME_H_INCLUDED My second question is, do I need to #include both the .h file and the .cpp file, and in which order. My third question is where can I find the GNU GCC Compiler that, I beleive, was packaged with Code::Blocks and how do I use it without Code::Blocks? I would rather develop in a notepad++ sort of way because that is what I'm used to in Ruby but since C++ is compiled, you may think differently (please give advice and views on that as well) Thanks in advance, ell.

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  • Switching to FormViewMode.Edit is very slow

    - by Tim
    When i switch an ASP.Net Formview from readonly mode to edit mode it takes more than 6 seconds(from edit to readonly takes a split second). I have no idea whats the reason for it. The EditItemTemplate contains a lot of controls(table,textboxes,dropdownlists) but in fact not more than the ItemTemplate has. Yet i have even commented out the complete FormView.DataBound where the controls are data bounded but without significant change. My ASP.Net Web Apllication is using Ajax and the Formview is completely nested in an UpdatePanel. Any suggestions or assumptions for this behaviour?

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  • JavaScript apparently waits for each AJAX call before sending another in a loop

    - by itako
    Hello. Straight to the point: I have this javascript: for(item=1;item<5;item++) { xmlhttp=new XMLHttpRequest(); xmlhttp.open("GET",'zzz.php', true); xmlhttp.send(); } And in PHP file something like this: usleep(5);die('ok'); Now the problem is javascript seems to be waiting for each ajax call to be completed before sending another one. So the first response gets back after approx. 5 seconds, next after 10 seconds and so on. That's a very simplified version of what I do, since the real script involves using cURL in PHP and jQuery as JS lib. But the problem remains the same. Why do responses come back in 5 second intervals?

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  • jQuery slideDown() not animating (jquery-rails 3.0.4; jquery-ui-rails (4.0.5)

    - by Michael Guren
    I am following along in the latest Agile Web Development with Rails 4 book. In Chapter 11 (AJAX), the book instructs us to use the following code in the "create.js.erb" file: if ($('#cart tr').length == 1) { $('#cart').show('blind', 1000); } This code causes the #cart div to jump down without any content. After 1 second it appears. There is no sliding effect. I tried using slideDown(); as well, but the div just appears immediately. Out of curiosity, I tried slideUp(); when the div was visible. Voila. The div slid up. This appears to be a jQuery bug and wondered if anyone else has experienced this, or has any suggestions for me. Thanks.

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  • Why maven is not working in eclipse indigo?

    - by user1067665
    I'm trying to make a simple log in/ log out web application with maven and I'm creating the project with the command: " mvn archetype:generate " and choose 341 and it'll be created with the structure below: webapp -----src/main/java -----Referenced Libraries -----Maven Dependencies -----src -----target pom.xml But when I add some dependencies and update the project something weird happening with the structure of the project according to the picture below: webapp -----src/main/java -----Referenced Libraries -----JRE System Library -----src -----target pom.xml and it's not working any more. As you can see the the first one has a Maven dependencies Library but the second one has been changed to JRE System Library. I use mac os lion and eclipse indigo. Anyone how knows why is like that? Tancks

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  • Write a function int mystrlen(char *s) that returns the number of characters in a string wuthout str

    - by henry
    heres what i did, i just have ne error that i cant figure out. int mystrlen(char string[]) { char string1[LENGHT], string2[LENGHT]; int len1, len2; char newstring[LENGHT*2]; printf("enter first string:\n"); len1 = mystrlen(string1); printf("enter second string:\n"); len2 = mystrlen(string2); if(len1 == EOF || len2 == EOF) exit(1); strcpy(newstring, string1); strcat(newstring, string2); printf("%s\n", newstring); return 0;

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  • Can you get the previous value of a variable in Java?

    - by The Special One
    Say way have a variable (let's say String Str) and the value of Str starts of as " " then as some code is running it is set to "test" then somewhere else in the code it is changed again to say "tester". Now in the program I want to find out what the previous value of Str was. Is this possible in Java? So I am saying that the variable gets changed twice, and you want to find out what Str was before it got changed for the second time. So in the example above the latest value of Str would be "tester" but I wanted to find out what Str was before this (assuming you had no idea what it was before it was changed to tester) in this case I would want to be able to find out that Str was "test". Is it at all possible to do this in Java?

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  • jquery load function problem

    - by andrew
    Hi, i have a select box like that <select name="sehirler_post" id="sehirler_post"> i am getting values via jquery. i know two different ways to get values. first one is : var sehirler_post = jQuery('select#sehirler_post').attr('value'); second one is: jQuery('#sehirler_post ').val() and finally here is my problem, i have something like this: jQuery("#okay").load("ajax_post_category.php?okay="+id+""); i would like to use selectbox value instead of id (okay="+id+"). so, i must change +id+ part with select box value. however i can not do it.. i tried to do like that: jQuery("#okay").load("ajax_post_category.php?okay="+jQuery('#sehirler_post').val()+""); it did not work. there must be a way, so i can use selectbox value instead of id in my load function. if anyone helps me, ill be so glad. regards

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  • How to only show simpleTip if certain conditions are true?

    - by Michael
    I'm working on my first jquery project and have a question regarding the simpletip plugin. I basically have a calendar where the user can click different meeting titles and the corresponding dates get shaded in with a certain color. I am then using the simpletip to display more detailed information about the meeting when the user hovers over that date. What I want is for the simpletip to only display if the cell is colored in, or "on". When the calendar is blank and no meetings are activated, I don't want all the simpletips to show. I have tried using an if statement with a .mouseover() - this works at first, when the cells are off, no simpletip. After the meeting is turned on and colored in, the first mouseover does nothing, then the second mouseover shows the simpletip, and then the simpletip remains active even after the cell is turned off. Hope this makes sense... please help! Thank you in advance

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  • skipping certain number of frames on a timeline

    - by clamp
    hi, i have a mathematical problem which is a bit hard to describe, but i'll give it a try anyway. in a timeline, i have a number of frames, of which i want to skip a certain number of frames, which should be evenly distributed along the timeline. for example i have 10 frames and i want to skip 5, then the solution is easy: we skip every second frame. 10/5 = 2 if (frame%2 == 0) skip(); but what if the above division does result in a floating number? for example in 44 frames i want to skip 15 times. how can i determine the 15 frames which should be skipped? thanks!

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  • Split file with PHP and generate contents

    - by user201140
    How do I split the content below into separate files without the placeholder tags. I'd also like to take the text inside the placeholder tags and place them inside a new contents file. <div class='placeholder'>The First Chapter</div> This is some text. <div class='placeholder'>The Second Chapter</div> This is some more text. <div class='placeholder'>Last Chapter</div> The last chapter. Thanks.

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  • JavaScript eval() with `this`

    - by mojuba
    If I define a JavaScript code snippet in my HTML, like so: <div id=myElem onMyUpdate="alert('Update called for ' + this.id)">... then what is the most elegant way of evaluating it from within JavaScript with this properly assigned? What I came up with so far is something like this: if (elem.hasAttribute('onMyUpdate')) (function () { eval(elem.getAttribute('onMyUpdate')) }).call(elem); which looks terrible (to me), but works. Any better/more elegant alternatives? MDN says there used to be the second argument to eval() for doing just that but it's deprecated now; MDN then suggests to use operator with() instead, which, if you follow the link provided, turns out to be made deprecated by the latest standard. Dead end, in other words. (As a side note, StackOverflow ignores the word this in search terms and thus it may miss relevant answers - is there a way of telling it not to?) Edit: I forgot to mention: no jQuery please, just vanilla JavaScript

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  • Jquery function calls more than one time.

    - by Harie
    I am having an aspx page in which I am calling a user control. The user control I am using a pop up to display it when a user clicks a asp:linkbutton. In that user control I am having a textbox and I am calling a Jquery Blur to do some validation. While doing so the function is calling [blur] is calling twice. I just called an alert() with the textbox value.So I can see the alert is coming twice .What I need to do to avoid the second time. I need to do it only whenever the user going out of the textbox and that also one time. $('#<%=txtCategory.ClientID %>').blur(function() { alert($(this).val()); }); This is called twice.Thanks for ur response.

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