Search Results

Search found 18028 results on 722 pages for 'atomic values'.

Page 429/722 | < Previous Page | 425 426 427 428 429 430 431 432 433 434 435 436  | Next Page >

  • What does this xkcd code do?

    - by cobbal
    On the xkcd site today, the following appeared as a joke in a <script language="scheme"> tag so what does the following code do / represent? (define (eval exp env) (cond ((self-evaluating? exp) exp) ((variable? exp) (lookup-variable-value exp env)) ((quoted? exp) (text-of-quotation exp)) ((assignment? exp) (eval-assignment exp env)) ((definition? exp) (eval-definition exp env)) ((if? exp) (eval-if exp env)) ((lambda? exp) (make-procedure (lambda-parameters exp) (lambda-body exp) env)) ((begin? exp) (eval-sequence (begin-actions exp) env)) ((cond? exp) (eval (cond->if exp) env)) ((application? exp) (apply (eval (operator exp) env) (list-of-values (operands exp) env))) (else (error "Common Lisp or Netscape Navigator 4.0+ Required" exp))))

    Read the article

  • Displaying desired properties from search results with grails compass

    - by ombud
    Hi, I've been stumped with the problem of displaying a selected set of properties returned as a result via a Compass query in grails. I have 300 columns in my domain class and what I'd like to do is to return ONLY THOSE values I specify (around 10 - 15 properties/fields/columns). All the 300 columns have been indexed, btw. I know I can do this using Lucene by cycling through returned hits and selectively calling a=getField(column_name), et c. My qiuestion is, how do I do the same thing using thee Compass Grails plugin ? Any help will gratefully be appreciated. Thanks in anticipation, Ombud

    Read the article

  • graphics don't draw when loop condition is dates. c#, winForms

    - by jello
    so i got this piece of code. (currPosX is defined earlier) while (earliestDate < DateTime.Today) { currPosX = currPosX + 5; e.Graphics.DrawLine(Pens.Black, currPosX, 0, currPosX, 10); earliestDate = earliestDate.AddDays(1); } the graphics don't draw. it's really weird, since this only happens when the condition statement is a date comparison. I debugged, and it does go in the loop, and the values are messed with (currPosX for example). But, no display. one more weirdness, if I add a MessageBox.Show("blabla") in the loop, the message box pops up, and graphics are drawn. what's going on here?

    Read the article

  • Prepared statement help, Number of variables doesn't match number of parameters in prepared statement

    - by Sam Gabriel
    I'm getting this error : Number of variables doesn't match number of parameters in prepared statement every time I run this code: $dbh = new mysqli("localhost", "***", "***", "pics"); $stmt = $dbh->prepare("INSERT INTO comments (username, picture, comment) VALUES (?, ?, ?)"); $stmt->bind_Param('s', $username); $stmt->bind_Param('d', $picture); $stmt->bind_Param('s', $comment); $username=$_SESSION['username']; $picture=$_GET['id']; $comment=$_POST['comment']; $stmt->execute(); What's the problem?

    Read the article

  • jQuery ::: Does remove really remove?

    - by phpN00b
    I'm trying to remove a table row using jQuery, and while it disappears from the screen, and therefore, appears to work, in Firebug, I can still see the code for it. There are form elements in this row, and so, I want to understand whether the row is truly being deleted or not, because I wouldn't want those values submitted. So, does remove really remove? Below is the code I'm using... Maybe I'm doing it wrong? if($('.delete')) { $(".delete").live('click', function(event) { $(this).closest('tr').remove(); }); }

    Read the article

  • Ruby on Rails: strange voting increment behavior

    - by Justin Meltzer
    So I have an up and a downvote button that inserts a vote with a value of 1 or -1 into the database. This works correctly. Then, I display the total vote count for that element by summing up its votes' values. However, this isn't working correctly, because the vote sum display is acting really strange: The first vote on a video doesn't seem to increment it at all. Then the second vote does. If I go from an upvote to a downvote, it increments up once, and then the next downvote is down. This is difficult to explain, but maybe you can figure out what is wrong with my code. I have this function in my Video model (the element that is voted on, it has_many video_votes): def vote_sum read_attribute(:vote_sum) || video_votes.sum(:value) end I also have this in my VideoVote model: after_create :update_vote_sum private def update_vote_sum video.update_attributes(:vote_sum => video.vote_sum + value) end What am I doing wrong?

    Read the article

  • Page auto reload with parameters

    - by Mithil Deshmukh
    I am trying to autoreload my page after every 20 seconds. I am using JavaScript for this instead of the <meta. I have <body onload="SetTimer()" and here is my JavaScript function function SetTimer(){ setTimeout('window.location.replace(window.location.pathname)', 20000) } Now my problem is I also pass a parameter within the querystring when this page is loaded first. But when the page relaods again (window.location.pathname does not include the parameter) hence I am not able to assign values to the labels on the page which is based on the parameters passed.

    Read the article

  • how to use found_rows in oracle package to avoid two queries

    - by Omnipresent
    I made a package which I can use like this: select * from table(my_package.my_function(99, 'something, something2', 1, 50)) I make use of the package in a stored procedure. Sample stored procedure looks like: insert into something values(...) from (select * from table(my_package.my_function(99, 'something, something2', 1, 50))) a other_table b where b.something1 = a.something1; open cv_1 for select count(*) from table(my_package.my_function(99, 'something, something2', 1, 50)) So I am calling the same package twice. first time to match records with other tables and other stuff and second time to get the count. Is there a way to get the count first time around and put it into a variable and second time around I just pick that variable rather than calling the whole query again? Hope it makes sense.

    Read the article

  • Simple select not working on JDBC MSSQL ?

    - by Xinus
    I am trying to move project which was using MySQL database to the one that uses MSSQL 2008, But the select that was working in mysql is no longer working in MSSQL PreparedStatement statement = connection .prepareStatement("select u.user_firstname,u.user_lastname from user_details u, login l where l.username=? and l.login_user = u.user_id"); statement.setString(1, userName); ResultSet resultSet = (ResultSet) statement.executeQuery(); It always gives me empty resultset even when there are values corresponding to that username, When I run query using MSSQL management studio - query works properly i.e. it gives non-zero rows, Are there any MSSQL specific change I need to do ?

    Read the article

  • iPhone dev question: "No provisioned iPhone OS is connected" error, I don't know what else to try fo

    - by dsobol
    Howdy, I am trying to compile and install my first application onto my iPhone after setting up a profile and certificate. At this point I am getting the "No provisioned iPhone OS is connected" error when I Build & Go. I am using iPhone OS 3.1.3, and Xcode 3.2.2 on 10.6.3. • I have verified that my iPhone is connected to my development machine (it is seen on the computer by both iTunes and Xcode Organizer (in Organizer, it has the green dot next to it)). • I have rebooted the iPhone and restarted Xcode multiple times. • I have verified that the Bundle Identifier in my appname.plist is set to com.. (with the appropriate values between the angle brackets). I have looked the error message up on the web, and so far have not found a hint that has gotten me over the hump.... Thanks for any and all assistance! Regards, Steve O'Sullivan

    Read the article

  • using nested arrays by php http_build_query() and recieve them in flash AS3

    - by Mahmoud
    hi, i am having this hard time figuring what is needed to do, i am using URLVariables to send/recieve values between flash and PHP the problem is, i am unable to access nested arrays ( array inside an array ) with flash heres an example: $dgresult = array("total" = $results); echo http_build_query($dgresult,"flf_"); in flash, all i need to do is to use: var variables:URLVariables = new URLVariables(e.target.data); then i can access it with : variables.total the problem now is when i have nested arrays: $dgresult = array("total" = $results); array_push($dgresult,$another_array); http_build_query($dgresult,"flf_"); i can still access variables.total but what about anything that has flf_ ? how is that possible?

    Read the article

  • Parsing complex string using regex

    - by wojtek_z
    My regex skills are not very good and recently a new data element has thrown my parser into a loop Take the following string "+USER=Bob Smith-GROUP=Admin+FUNCTION=Read/FUNCTION=Write" Previously I had the following for my regex : [+\\-/] Which would turn the result into USER=Bob Smith GROUP=Admin FUNCTION=Read FUNCTION=Write FUNCTION=Read But now I have values with dashes in them which is causing bad output New string looks like "+USER=Bob Smith-GROUP=Admin+FUNCTION=Read/FUNCTION=Write/FUNCTION=Read-Write" Which gives me the following result , and breaks the key = value structure. USER=Bob Smith GROUP=Admin FUNCTION=Read FUNCTION=Write FUNCTION=Read Write Can someone help me formulate a valid regex for handling this or point me to some key / value examples. Basically I need to be able to handle + - / signs in order to get combinations.

    Read the article

  • How do I prevent jagged edges alongside the surfaces of my 3d model?

    - by badcodenotreat
    Lets say I've implemented in openGL a crude model viewer with shading which renders a series of blocks, such that I have something that looks like this. http://i.imgur.com/TsF7K.jpg Whenever I rotate my model to the side, it causes an unwanted jagged effect along any surface with a steep viewing angle. http://i.imgur.com/Bgl9o.jpg I'm pretty sure this is due to the polygon offset I used to prevent z-fighting between the model and the wireframe, however I'm not able to find the factor/unit parameters in openGL which prevent this unwanted effect. what are the best values of factor and unit for glPolygonOffset to prevent this? would implementing anti-aliasing alleviate the problem? is the trade off in performance trivial/significant? is this perhaps a shading issue? should i try a solution along this line of thought?

    Read the article

  • SQL: Need to SUM on results that meet a HAVING statement

    - by Wasauce
    I have a table where we record per user values like money_spent, money_spent_on_candy and the date. So the columns in this table (let's call it MoneyTable) would be: UserId Money_Spent Money_Spent_On_Candy Date My goal is to SUM the total amount of money_spent -- but only for those users where they have spent more than 10% of their total money spent for the date range on candy. What would that query be? I know how to select the Users that have this -- and then I can output the data and sum that by hand but I would like to do this in one single query. Here would be the query to pull the sum of Spend per user for only the users that have spent 10% of their money on candy. SELECT UserId, SUM(Money_Spent), SUM(Money_Spent_On_Candy) / SUM(Money_Spent) AS PercentCandySpend FROM MoneyTable WHERE DATE >= '2010-01-01' HAVING PercentCandySpend > 0.1;

    Read the article

  • Grails Unit Tests: Why does this statement fail?

    - by leeand00
    I've developed in Java in the past, and now I'm trying to learn Grails/Groovy using this slightly dated tutorial. import grails.test.* class DateTagLibTests extends TagLibUnitTestCase { def dateTagLib protected void setUp() { super.setUp() dateTagLib = new DateTagLib() } protected void tearDown() { super.tearDown() } void testThisYear() { String expected = Calendar.getInstance().get(Calendar.YEAR) // NOTE: This statement fails assertEquals("the years dont match and I dont know why.", expected, dateTagLib.thisYear()) } } DateTagLibTests.groovy (Note: this TagLibUnitTestCase is for Grails 1.2.1 and not the version used in the tutorial) For some reason the above test fails with: expected:<2010 but was:<2010 I've tried replacing the test above with the following alternate version of the test, and the test passes just fine: void testThisYear() { String expected = Calendar.getInstance().get(Calendar.YEAR) String actual = dateTagLib.thisYear() // NOTE: The following two assertions work: assertEquals("the years don\'t match", expected, actual) assertTrue("the years don\'t match", expected.equals(actual)) } These two versions of the test are basically the same thing right? Unless there's something new in Grails 1.2.1 or Groovy that I'm not understanding. They should be of the same type because the values are both the value returned by Calendar.getInstance().get(Calendar.YEAR)

    Read the article

  • Using numeric_limits::max() in constant expressions

    - by FireAphis
    Hello, I would like to define inside a class a constant which value is the maximum possible int. Something like this: class A { ... static const int ERROR_VALUE = std::numeric_limits<int>::max(); ... } This declaration fails to compile with the following message: numeric.cpp:8: error: 'std::numeric_limits::max()' cannot appear in a constant-expression numeric.cpp:8: error: a function call cannot appear in a constant-expression I understand why this doesn't work, but two things look weird to me: It seems to me a natural decision to use the value in constant expressions. Why did the language designers decide to make max() a function thus not allowing this usage? The spec claims in 18.2.1 that For all members declared static const in the numeric_limits template, specializations shall define these values in such a way that they are usable as integral constant expressions. Doesn't it mean that I should be able to use it in my scenario and doesn't it contradict the error message? Thank you.

    Read the article

  • Why does the JavaScript need to start with ";" ?

    - by TK
    I have recently noticed that a lot of JavaScript files on the web starts with ; immediately following the comment section. For example, this jQuery plugin's code starts with /** * jQuery.ScrollTo * Copyright (c) 2007-2008 Ariel Flesler - aflesler(at)gmail(dot)com | http://flesler.blogspot.com * Dual licensed under MIT and GPL. * Date: 9/11/2008 .... skipping several lines for brevity... * * @desc Scroll on both axes, to different values * @example $('div').scrollTo( { top: 300, left:'+=200' }, { axis:'xy', offset:-20 } ); */ ;(function( $ ){ Why does the file needs to start with ;? I see this convention on server-side JavaScript files as well. What is an advantage and disadvantage of doing this?

    Read the article

  • Write data to an xml file.

    - by Bobby
    My aim is to write an XML file with few tags whose values are the regional language. I'm using Python to do this and using IDLE(Pythong GUI) for programming. While I try to write the words in an xmls file it gives the following error. UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-4: ordinal not in range(128) For now, I'm not using any xml writer library instead I'm opening a file "test.xml" and writing the data into it. This error is encountered by the line: f.write("\t\" + data + "\"). If I replace the above write statement with print statement then it prints the data properly on Python Shell. I'm reading the data from an excel file which is not in the UTF8,16, or 32 encoding formats. Its in some other format. cp1252 is reading the data properly. Any help in getting this data writtent oan xml would be highly appreciated. Thanks in advance. Bob

    Read the article

  • Is it possible to a db constraint in for this rule?

    - by Pure.Krome
    Hi folks, I wish to make sure that my data has a constraint the following check (constraint?) in place This table can only have one BorderColour per hub/category. (eg. #FFAABB) But it can have multiple nulls. (all the other rows are nulls, for this field) Table Schema ArticleId INT PRIMARY KEY NOT NULL HubId TINYINT NOT NULL CategoryId INT NOT NULL Title NVARCHAR(100) NOT NULL Content NVARCHAR(MAX) NOT NULL BorderColour VARCHAR(7) -- Can be nullable. I'm gussing I would have to make a check constraint? But i'm not sure how, etc. sample data. 1, 1, 1, 'test', 'blah...', '#FFAACC' 1, 1, 1, 'test2', 'sfsd', NULL 1, 1, 2, 'Test3', 'sdfsd dsf s', NULL 1, 1, 2, 'Test4', 'sfsdsss', '#AABBCC' now .. if i add the following line, i should get some sql error.... INSERT INTO tblArticle VALUES (1, 2, 'aaa', 'bbb', '#ABABAB') any ideas?

    Read the article

  • Decrease DB requests number from Django templates

    - by Andrew
    I publish discount offers for my city. Offer models are passed to template ( ~15 offers per page). Every offer has lot of items(every item has FK to it's offer), thus i have to make huge number of DB request from template. {% for item in offer.1 %} {{item.descr}} {{item.start_date}} {{item.price|floatformat}} {%if not item.tax_included %}{%trans "Without taxes"%}{%endif%} <a href="{{item.offer.wwwlink}}" >{%trans "Buy now!"%}</a> </div> <div class="clear"></div> {% endfor %} So there are ~200-400 DB requests per page, that's abnormal i expect. In django code it is possible to use select_related to prepopulate needed values, how can i decrease number of requests in template?

    Read the article

  • effective retrieve for a voting system in PHP and MySQL

    - by Adnan
    Hello, I have a system where registered users can vote up/vote down comment for a picture. Something very similar to SO's voting system. I store the votes in a table with values as such; vote_id | vote_comment_id | vote_user_id | vote_date | vote_type Now I have few a question concerned the speed and efficiency for the following; PROB: Once a user opens the picture page with comments I need, if that user has already voted UP/DOWN a comment to show it like; "you voted up" or "you voted down" next to the comment (in SO it the vote image is highlighted) MY POSSIBLE SOL: Right now when I open a picture page for each comment I loop thru, I loop thru my table of votes as well and check if a user has voted and show the status (I compare the vote_user_id with the user's session). How efficient is this? Anyone have a better approach to tackle this kind of problem?

    Read the article

  • Intermittent Internet Explorer Error whilst using Javascript to traverse XML Nodes

    - by Sykth
    Hi there all, Basically I use a javascript SOAP plugin to send and receive XML from a web service. Recently I've been experiencing intermittment (1 in every 20-30 times) errors in IE when trying to access data in the XML file. Bear with me on this, I'm going to try and go into a fair amount of detail to help anyone who is willing to read this: I have a html file, with an external javascript file attached. In the javascript file I include 5 global variables: var soapRes; var questionXML; var xRoot; var assessnode; var edStage = 0; Once the html file is at a readystate I request the XML file from the web service like this: function initNextStage(strA) { // Set pl Parameters here var pl = new SOAPClientParameters(); // soap call var r = SOAPClient.invoke(url, "LoadAssessment", pl, true, initStage_callBack); } function initStage_callBack(r, soapResponse) { soapRes = soapResponse; initvalues(); function initvalues(){ xRoot = soapRes.documentElement; assessnode = xRoot.getElementsByTagName("ed")[0]; questionXML = assessnode.getElementsByTagName("question")[edStage]; } } Once this is completed the XML should be loaded into memory via the global variable soapRes. I then save values to the XML before moving one node down the XML tree, and pulling the next set of values out of it. function submitAns1() { var objAns; var corElem; var corElemTxt; questionXML = assessnode.getElementsByTagName("question")[edStage]; objAns = questionXML.getElementsByTagName("item")[0].getAttribute("answer"); corElem = soapRes.createElement("correct"); corElemTxt = soapRes.createTextNode("value"); questionXML.appendChild(corElem); corElem.appendChild(corElemTxt); if(objAns == "t") { corElemTxt.nodeValue = "true"; } else { corElemTxt.nodeValue = "false"; } edStage++; questionXML = assessnode.getElementsByTagName("question")[edStage]; var inc1 = questionXML.getElementsByTagName("sentence")[0]; var inc2 = questionXML.getElementsByTagName("sentence")[1]; var edopt1 = questionXML.getElementsByTagName("item")[0]; var edopt2 = questionXML.getElementsByTagName("item")[1]; var edopt3 = questionXML.getElementsByTagName("item")[2]; var edopt4 = questionXML.getElementsByTagName("item")[3]; var edopt5 = questionXML.getElementsByTagName("item")[4]; var temp1 = edopt1.childNodes[0].nodeValue; var temp2 = edopt2.childNodes[0].nodeValue; var temp3 = edopt3.childNodes[0].nodeValue; var temp4 = edopt4.childNodes[0].nodeValue; var temp5 = edopt5.childNodes[0].nodeValue; } This is an example of our XML: <ed> <appid>Administrator</appid> <formid>ED009</formid> <question id="1"> <sentence id="1">[email protected]</sentence> <sentence id="2">[email protected]</sentence> <item id="0" answer="f" value="0">0</item> <item id="1" answer="f" value="1">1</item> <item id="2" answer="f" value="2">2</item> <item id="3" answer="t" value="3">3</item> <item id="4" answer="f" value="4">4</item> </question> <question id="2"> <sentence id="1">Beausdene 13</sentence> <sentence id="2">Beauscene 83</sentence> <item id="0" answer="f" value="0">0</item> <item id="1" answer="f" value="1">1</item> <item id="2" answer="t" value="2">2</item> <item id="3" answer="f" value="3">3</item> <item id="4" answer="f" value="4">4</item> </question> </ed> The error I receive intermittently is that "questionXML" is null or not an object. Specifically this line when I call on the submitAns1() method: questionXML = assessnode.getElementsByTagName("question")[edStage]; This solution works on FF, Opera, Chrome & Safari without any issues as far as I am aware. Am I accessing the XML nodes incorrectly? I've been toying with fixes for this bug for weeks now, I'd really appreciate any insight into what I'm doing wrong. On a side note, this is a personal project of mine - it's not university related - I'm much too old for that! Any help greatly appreciated. Regards, Sykth.

    Read the article

  • Microsft Jet oledb connection to excel loses formulae

    - by Saubhagya
    I have a dataset and I write it's values to an excel file using Microsoft Jet 4.0 Oledb provider. I want to put hyperlinks into the excel, for this I write "=HYPERLINK("http://www.abc.org/x.pdf")" in DS and then write it to excel. But when the excel is opened it prefixes a ' (quote/apostrophe) before the formula and there it comes as a text, not link. Can you help me removing that quote so that my excel file has hyperlinks instead of that as text? I need to use Microsoft Jet 4.0 provider (not excel component) as the client machine may or may not have MS-Excel installed on his machine.

    Read the article

  • No_data_found exception is progating in outer block also?

    - by Vineet
    In my code i am entering the salary which is not available in employees table and then again inserting duplicate employee_id in primary key column of employee table in exception block where i am handling no data found exception but i do not why 'No data found exception in the end also? OUTPUT coming: Enter some other sal ORA-01400: cannot insert NULL into ("SCOTT"."EMPLOYEES"."LAST_NAME") ORA-01403: no data found --This should not come according to logic This is the code DECLARE v_sal number:=&p_sal; v_num number; BEGIN BEGIN select salary INTO v_num from employees where salary=v_sal; EXCEPTION WHEN no_data_found THEN DBMS_OUTPUT.PUT_LINE('Enter some other sal'); INSERT INTO employees (employee_id)values(100) ; END; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE(sqlerrm); END;

    Read the article

  • Using listpreference and getting the key works but no ok button...

    - by Allan
    I'm using listpreference in my android app and getting my key values and all is well and works good (now that you guys have helped me) BUT - when my listpreference menus popup, they only contain a cancel button. Let's say the user is choosing between red, blue, and green. When the listpreference dialog first pops-up, the dialog only shows a cancel button. Because of that, the dialog disappears as soon as the user selects their choice. I would like it so that when the user chooses their setting, they see the radio button get highlighted and then they go ahead and click the ok button...but I don't have an ok button and can't figure out why. Any help would be awesome...al

    Read the article

< Previous Page | 425 426 427 428 429 430 431 432 433 434 435 436  | Next Page >