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  • [MSVC++] Breakpoints on a variable changing value?

    - by John
    I'm chasing a bug where a member value of an object seems to magically change, without any methods being called which modify it. No doubt something obvious but proving hard to track down. I know I can put conditional break-points in methods based on the variable value, but is it in any way possible to actually put a breakpoint on a variable itself? e.g a breakpoint which fires when x==4? I know I can put watches on, what about breakpoints?

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  • Check value existance while performing a UPDATE query

    - by nimo
    Hi, I need to perform a simple update query where the update should only be done, if there is no value with updating value (item_name). For example, DB table [item_types] item_id(PK) | item_name Assuming there exist item_id with 6, My attempt is UPDATE item_types as k SET k.item_name = 'item_1' WHERE NOT EXISTS (SELECT * FROM item_types as a WHERE a.item_name = 'item_1') AND k.item_id = '6' But this gives me error "You can't specify target table 'k' for update in FROM clause" Could you please explain the error here and how can I achieve this ? Thank you

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  • SQL SERVER – A Puzzle Part 3 – Fun with SEQUENCE in SQL Server 2012 – Guess the Next Value

    - by pinaldave
    Before continuing this blog post – please read the two part of the SEQUENCE Puzzle here A Puzzle – Fun with SEQUENCE in SQL Server 2012 – Guess the Next Value and A Puzzle Part 2 – Fun with SEQUENCE in SQL Server 2012 – Guess the Next Value Where we played a simple guessing game about predicting next value. The answers the of puzzle is shared on the blog posts as a comment. Now here is the next puzzle based on yesterday’s puzzle. I recently shared the puzzle of the blog post on local user group and it was appreciated by attendees. First execute the script which I have written here. Today’s script is bit different than yesterday’s script as well it will require you to do some service related activities. I suggest you try this on your personal computer’s test environment when no one is working on it. Do not attempt this on production server as it will for sure get you in trouble. The purpose to learn how sequence behave during the unexpected shutdowns and services restarts. Now guess what will be the next value as requested in the query. USE AdventureWorks2012 GO -- Create sequence CREATE SEQUENCE dbo.SequenceID AS BIGINT START WITH 1 INCREMENT BY 1 MINVALUE 1 MAXVALUE 500 CYCLE CACHE 100; GO -- Following will return 1 SELECT next value FOR dbo.SequenceID; ------------------------------------- -- simulate server crash by restarting service -- do not attempt this on production or any server in use ------------------------------------ -- Following will return ??? SELECT next value FOR dbo.SequenceID; -- Clean up DROP SEQUENCE dbo.SequenceID; GO Once the server is restarted what will be the next value for SequenceID. We can learn interesting trivia’s about this new feature of SQL Server using this puzzle. Hint: Pay special attention to the difference between new number and earlier number. Can you see the same number in the definition of the CREATE SEQUENCE? Bonus Question: How to avoid the behavior demonstrated in above mentioned query. Does it have any effect of performance? I suggest you try to attempt to answer this question without running this code in SQL Server 2012. You can restart SQL Server using command prompt as well. I will follow up of the answer in comments below. Recently my friend Vinod Kumar wrote excellent blog post on SQL Server 2012: Using SEQUENCE, you can head over there for learning sequence in details. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • How can I avoid hard-coding YubiKey user identities into the PAM stack?

    - by CodeGnome
    The Yubico PAM Module seems to require changes to the PAM stack for each user that will be authenticated with a YubiKey. Specifically, it seems that each user's client identity must be added to the right PAM configuration file before the user can be authenticated. While it makes sense to add authorized keys to an authentication database such as /etc/yubikey_mappings or ~/.yubico/authorized_yubikeys, it seems like a bad practice to have to edit the PAM stack itself for each individual user. I would definitely like to avoid having to hard-code user identities into the PAM stack this way. So, is it possible to avoid hard-coding the id parameter to the pam_yubico.so module itself? If not, are there any other PAM modules that can leverage YubiKey authentication without hard-coding the stack?

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  • Debugging HTML & JavaScript with Firebug

    - by MattDiPasquale
    I made a JSONP widget. However, when one of the partner sites put it in their page, (1) it doesn't render at all in IE and (2) in other browsers (Firefox & Google Chrome), the HTML of the widget renders incorrectly: the <aside> closes prematurely, before the Financial Aid Glossary. It's something specific to that page because it works fine on this example college resource center page. To fix these two issues, I tried saving the page source to a local file and messing around with the local file and with Firebug, deleting DOM elements and stuff. I even tried fixing the errors that The W3C Markup Validation Service found. But, I still couldn't get it to render correctly. How should I tell them to change their page so that the widget renders correctly? Or, how should I update the widget script I wrote? They may take their page down since it's not rendering correctly, so here's the source of the page just in case: <!DOCTYPE html> <html> <head id="ctl01_Head1" profile="New Jersey Credit Union League"><title> College Resource Center - New Jersey Credit Union League </title> <link rel='stylesheet' type='text/css' href='http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/themes/base/jquery.ui.all.css' /> <link rel='stylesheet' type='text/css' href='/csshandler.ashx?skin=InnerTemplate&amp;s=1&amp;v=2.3.5.8' /> <!--[if IE]> <script defer="defer" src="http://njcul.org/ClientScript/html5.js" type="text/javascript"></script> <![endif]--> <!--[if lt IE 7]> <link rel="stylesheet" href="http://njcul.org/Data/Sites/1/skins/InnerTemplate/IESpecific.css?cb=9d546eec-6752-4067-8f94-9a5b642213e4" type="text/css" id="IE6CSS" /> <![endif]--> <!--[if IE 7]> <link rel="stylesheet" href="http://njcul.org/Data/Sites/1/skins/InnerTemplate/IE7Specific.css?cb=9d546eec-6752-4067-8f94-9a5b642213e4" 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$("#toolbarbut").fadeOut("slow");} $(document).ready(function(){ $("span.downarr a").click(function() {HideMenuToolbar(); Set_Cookie('openstate', 'closed')}); $("span.showbar a").click(function() {ShowMenuToolbar(); Set_Cookie('openstate', 'open') }); $("span.downarr a, span.showbar a").click(function() { return false; }); var openState = Get_Cookie('openstate'); if(openState != null){ if(openState == 'closed'){HideMenuToolbar();} if(openState == 'open'){ShowMenuToolbar();}} }); </script> <div> <input type="hidden" name="ctl01$ctl06" id="ctl01_ctl06" /> </div> <div> <input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWBQKv1e3VCALs75XzDgL+qaz3AwLv26TNCQKS/MC2Dg==" /> </div> <script type="text/javascript">Sys.Application.add_load(function() { var form = Sys.WebForms.PageRequestManager.getInstance()._form; form._initialAction = form.action = window.location.href; }); </script> <script type="text/javascript"> //<![CDATA[ (function() {var fn = function() {$get("ctl01_ScriptManager1_HiddenField").value = '';Sys.Application.remove_init(fn);};Sys.Application.add_init(fn);})(); WebForm_InitCallback();//]]> </script> <script type="text/javascript" > $('div.mojo-accordion').accordion({fx:{opacity:'toggle',duration:'fast'}}); $('div.mojo-accordion-nh').accordion({fx:{opacity:'toggle',duration:'fast'},autoHeight:false}); $('div.mojo-tabs').tabs({fx:{opacity:'toggle',duration:'fast'}}); $('input.jqbutton').button(); </script> <script type="text/javascript">$('#ctl01_spanel1').cycle({fx:'fade',speed:1000,timeout:3000,next:'#ctl01_spanel1'});</script> <script type="text/javascript"> var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); </script> <script type="text/javascript"> try{ var mojoPageTracker = _gat._getTracker("UA-19333588-1"); mojoPageTracker._setCustomVar(1, "member-type", "anonymous", 1);mojoPageTracker._trackPageview(); } catch(err) {} </script> <script type="text/javascript"> //<![CDATA[ Sys.Application.initialize(); //]]> </script> </form> </body> </html>

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  • Doctrine: How to traverse from an entity to another 'linked' entity?

    - by ropstah
    I'm loading 3 different tables using a cross-join in Doctrine_RawSql. This brings me back the following object: User -> User class (doctrine base class) Settings -> DoctrineCollection of Setting User_Settings -> DoctrineCollection of User_Setting The object above is the result of a many-to-many relationship between User and Setting where User_Setting acts as a reference table. User_Setting also contains another field named value. This obviously contains the value of the corresponding Setting. All good so far, however the Settings and User_Settings properties of the returned User object are in no way linked to each other (apart from the setting_id field ofcourse). Is there any direct way to traverse directly from the Settings property to the corresponding User_Settings property? This is the corresponding query: $sets = new Doctrine_RawSql(); $sets->select('{us.*}, {s.*}, {uset.*}') ->from('(User us CROSS JOIN Setting s) LEFT JOIN User_Setting uset ON us.user_id = uset.user_id AND s.setting_id = uset.setting_id') ->addComponent('us', 'User us') ->addComponent('uset', 'us.User_Setting uset') ->addComponent('s', 'us.Setting s') ->where('s.category_id = ? AND us.usr_auto_key = ?',array(1, 1)); $sets = $sets->execute();

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  • Inspiring a co-worker to adopt better coding practices?

    - by Aaronaught
    In the Handling my antiquated coworker question, various people discussed strategies for dealing with coworkers who are unwilling to integrate their workflow with the team's. I'd like, if possible, to learn some strategies for "teaching" a coworker who is merely ignorant of modern techniques and tools, and possibly a little apathetic. I've started working with a programmer who until recently has been working in relative isolation, in a different part of the company. He has extensive domain knowledge and most importantly he has demonstrated good problem-solving skills, something which many candidates seem to lack. However, the actual (C#) code I've seen is a throwback to the VB6 days. Procedural structure, Hungarian notation, global variables (abuse of static), no interfaces, no tests, non-use of Generics, throwing System.Exception... you get the idea. This programmer is a fair bit older than I am and, by first impressions at least, doesn't actively seek positive change. I'm not going to say resistant to change, because I think that is largely an issue of how the topic gets broached, and I want to be prepared. Programmers tend to be stubborn people, and going in with guns blazing and instituting rip-it-to-shreds code reviews and strictly-enforced policies is very likely not going to produce the end result that I want. If this were a new hire, a junior programmer, I wouldn't think twice about taking a "mentor" stance, but I'm extremely wary of treating an experienced employee as a clueless newbie (which he's not - he just hasn't kept pace with certain advancements in the field). How might I go about raising this developer's code quality standard the Dale Carnegie way, through gentle persuasion and non-material incentives? What would be the best strategy for effecting subtle, gradual changes, without creating an adversarial situation? Have other people - especially lead developers - been in this type of situation before? Which strategies were successful at stimulating interest and creating a positive group dynamic? Which strategies weren't successful and would be better to avoid? Clarifications: I really feel that several people are answering based on personal feelings without actually reading all of the details of the question. Please note the following, which should have been implied but I am now making explicit: This coworker is only my "senior" by virtue of age. I never said that his title, sphere of influence, or years at the organization exceed mine, and in fact, none of those things are true. He's a LOB programmer who's been absorbed into the main development shop. That's it. I am not a new hire, junior programmer, or other naïve idiot with grand plans to transform the company overnight. I am basically in charge of the software process, but as many who've worked as "leads" will know, responsibilities don't always correlate precisely with the org chart. I'm not asking people how to get my way, come hell or high water. I could do that if I wanted to, with the net result being that this person would become resentful and/or quit. Please try to understand that I am looking for a social, cooperative method of driving change. The mention of "...global variables... no tests... throwing System.Exception" was intended to demonstrate that the problems are not just superficial or aesthetic. Practices that may work for relatively small CRUD apps do not necessarily work for large enterprise apps, and in fact, none of the code so far has actually passed the integration tests. Please, try to take the question at face value, accept that I actually know what I'm talking about, and either answer the question that I actually asked or move on. P.S. My sincerest gratitude to those who -did- offer constructive advice rather than arguing with the premise. I'm going to leave this open for a while longer as I'm hoping to hear more in the way of real-world experiences.

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  • Code Contracts with Interfaces: "Method Invocation skipped. Compiler will generate method invocation

    - by Jörg Battermann
    Good evening, I just started playing with Microsoft.Contracts (latest version) and plugging it on top of a sample interface and right now it looks like this: namespace iRMA2.Core.Interfaces { using System; using System.Collections.Generic; using System.ComponentModel.Composition; using System.Diagnostics.Contracts; /// <summary> /// Base Interface declarations for iRMA2 Extensions /// </summary> [InheritedExport] [ContractClass(typeof(IiRMA2ExtensionContract))] public interface IiRMA2Extension { /// <summary> /// Gets the name. /// </summary> /// <value>The name of the Extension.</value> string Name { get; } /// <summary> /// Gets the description. /// </summary> /// <value>The description.</value> string Description { get; } /// <summary> /// Gets the author of the extension. Please provide complete information to get in touch with author(s) and the corresponding department /// </summary> /// <value>The author of the extensions.</value> string Author { get; } /// <summary> /// Gets the major version. /// </summary> /// <value>The major version of the extension.</value> int MajorVersion { get; } /// <summary> /// Gets the minor version. /// </summary> /// <value>The minor version.</value> int MinorVersion { get; } /// <summary> /// Gets the build number. /// </summary> /// <value>The build number.</value> int BuildNumber { get; } /// <summary> /// Gets the revision. /// </summary> /// <value>The revision.</value> int Revision { get; } /// <summary> /// Gets the depends on. /// </summary> /// <value>The dependencies to other <c>IiRMA2Extension</c> this one has.</value> IList<IiRMA2Extension> DependsOn { get; } } /// <summary> /// Contract class for <c>IiRMA2Extension</c> /// </summary> [ContractClassFor(typeof(IiRMA2Extension))] internal sealed class IiRMA2ExtensionContract : IiRMA2Extension { #region Implementation of IiRMA2Extension /// <summary> /// Gets or sets the name. /// </summary> /// <value>The name of the Extension.</value> public string Name { get { Contract.Ensures(!String.IsNullOrEmpty(Contract.Result<string>())); return default(string); } set { Contract.Requires(value != null); } } /// <summary> /// Gets the description. /// </summary> /// <value>The description.</value> public string Description { get { throw new NotImplementedException(); } } /// <summary> /// Gets the author of the extension. Please provide complete information to get in touch with author(s) and the corresponding department /// </summary> /// <value>The author of the extensions.</value> public string Author { get { throw new NotImplementedException(); } } /// <summary> /// Gets the major version. /// </summary> /// <value>The major version of the extension.</value> public int MajorVersion { get { throw new NotImplementedException(); } } /// <summary> /// Gets the minor version. /// </summary> /// <value>The minor version.</value> public int MinorVersion { get { throw new NotImplementedException(); } } /// <summary> /// Gets the build number. /// </summary> /// <value>The build number.</value> public int BuildNumber { get { throw new NotImplementedException(); } } /// <summary> /// Gets the revision. /// </summary> /// <value>The revision.</value> public int Revision { get { throw new NotImplementedException(); } } /// <summary> /// Gets the Extensions this one depends on. /// </summary> /// <value>The dependencies to other <c>IiRMA2Extension</c> this one has.</value> public IList<IiRMA2Extension> DependsOn { get { Contract.Ensures(Contract.Result<IList<IiRMA2Extension>>() != null); return default(IList<IiRMA2Extension>); } } #endregion } } Now why are the two Contract.Ensures(...) 'blured' out visually with the tooltip saying "Method Invocation skipped. Compiler will generate method invocation because the method is conditional or it is partial method without implementation" and in fact the CodeContracts output does not count/show them... What am I missing & doing wrong here? -J

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  • Best way to integrate StyleCop with TFS CI

    - by Slavo
    I've been doing research on how to enable source analysis for the project I'm working on and plan to use StyleCop. The setup I have is a TFS Server for source control, using TFS Continuous Integration. I want to enable source analysis for CI builds and daily builds run on the build machine, and not only for those run on developers' machines. Here's an article from the documentation of StyleCop that I read on the subject: http://blog.newagesolution.net/2008/07/how-to-use-stylecop-and-msbuild-and.html. It basically modifies the csproj file for the purpose. I've also read other opinions about how StyleCop should be integrated with build automation, which advise doing the same thing using build tasks: http://blog.newagesolution.net/2008/07/how-to-use-stylecop-and-msbuild-and.html http://freetodev.spaces.live.com/blog/cns!EC3C8F2028D842D5!400.entry. What are you opinions? Have you had similar projects and done something like this?

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  • jquery - check length of input field?

    - by KnockKnockWhosThere
    The code below is intended to enable the submit button once the user clicks in the textarea field. It works, but I'm trying to also make it so that it's only enabled if there's at least one character in the field. I tried wrapping it in: if($(this).val().length > 1) { } But, that didn't seem to work... Any ideas? $("#fbss").focus(function(){ $(this).select(); if($(this).val()=="Default text") { $(this).val(""); $("input[id=fbss-submit]").removeClass(); $("input[id=fbss-submit]").attr('disabled',false); $("input[id= fbss-submit]").attr('class','.enableSubmit'); if($('.charsRemaining')) { $('.charsRemaining').remove(); $("textarea[id=fbss]").maxlength({ maxCharacters: 190, status: true, statusClass: 'charsRemaining', statusText: 'characters left', notificationClass: 'notification', showAlert: false, alertText: 'You have exceeded the maximum amount of characters', slider: false }); } });

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  • iPhone keyboard's return key will move curser to next textfield

    - by iAm
    Hello Fellow Koder ••• I have a TableViewController that is using a grouped Style and has two(2) sections. The first section has 4 rows and the second section has 3 rows. I have placed a UILabel and a UITextField in each cell, and have a custom method(textFieldDone:) to handle the cursor movement to the next text field when the return key is press. This works fine and dandy if there is only one section, but I have two :( and yes I need two:) so I started koden' up an answer, but got results that just don't work, I did notice during my debugging that cell Identifier (I use Two) is only showing the one (in the debug consol) and it's the first one only (Generic Cell). - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = nil; switch (indexPath.section) { case AUTO_DETAILS: { static NSString *cellID = @"GenericCell"; cell = [tableView dequeueReusableCellWithIdentifier:cellID]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:cellID] autorelease]; UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 75, 25)]; label.tag = kLabelTag; label.font = [UIFont boldSystemFontOfSize:14]; label.textAlignment = UITextAlignmentRight; [cell.contentView addSubview:label]; [label release]; UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(90, 12, 200, 25)]; textField.clearsOnBeginEditing = NO; [textField setDelegate:self]; [textField addTarget:self action:@selector(topTextFieldDone:) forControlEvents:UIControlEventEditingDidEndOnExit]; [cell.contentView addSubview:textField]; } NSInteger row = [indexPath row]; UILabel *label = (UILabel *)[cell viewWithTag:kLabelTag]; UITextField *textField = nil; for (UIView *oneView in cell.contentView.subviews) { if ([oneView isMemberOfClass:[UITextField class]]) textField = (UITextField *)oneView; } label.text = [topCellLabels objectAtIndex:row]; NSNumber *rowAsNum = [[NSNumber alloc] initWithInt:row]; switch (row) { case kMakeRowIndex: if ([[tempValues allKeys] containsObject:rowAsNum]) textField.text = [tempValues objectForKey:rowAsNum]; else textField.text = automobile.make; break; case kModelRowIndex: if ([[tempValues allKeys] containsObject:rowAsNum]) textField.text = [tempValues objectForKey:rowAsNum]; else textField.text = automobile.model; break; case kYearRowIndex: if ([[tempValues allKeys] containsObject:rowAsNum]) textField.text = [tempValues objectForKey:rowAsNum]; else textField.text = automobile.year; break; case kNotesRowIndex: if ([[tempValues allKeys] containsObject:rowAsNum]) textField.text = [tempValues objectForKey:rowAsNum]; else textField.text = automobile.notes; break; default: break; } if (textFieldBeingEdited == textField) { textFieldBeingEdited = nil; } textField.tag = row; [rowAsNum release]; break; } case AUTO_REGISTRATION: { static NSString *AutoEditCellID = @"AutoEditCellID"; cell = [tableView dequeueReusableCellWithIdentifier:AutoEditCellID]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:AutoEditCellID] autorelease]; UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 75, 25)]; label.tag = kLabelTag; label.font = [UIFont boldSystemFontOfSize:14]; label.textAlignment = UITextAlignmentRight; [cell.contentView addSubview:label]; [label release]; UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(90, 12, 200, 25)]; textField.clearsOnBeginEditing = NO; [textField setDelegate:self]; [textField addTarget:self action:@selector(bottomTextFieldDone:) forControlEvents:UIControlEventEditingDidEndOnExit]; [cell.contentView addSubview:textField]; } NSInteger row = [indexPath row]; UILabel *label = (UILabel *)[cell viewWithTag:kLabelTag]; UITextField *textField = nil; for (UIView *oneView in cell.contentView.subviews) { if ([oneView isMemberOfClass:[UITextField class]]) textField = (UITextField *)oneView; } label.text = [bottomCellLabels objectAtIndex:row]; NSNumber *rowAsNum = [[NSNumber alloc] initWithInt:row]; switch (row) { case 0: if ([[tempValues allKeys] containsObject:rowAsNum]) textField.text = [tempValues objectForKey:rowAsNum]; else textField.text = automobile.vinNumber; break; case 1: if ([[tempValues allKeys] containsObject:rowAsNum]) textField.text = [tempValues objectForKey:rowAsNum]; else textField.text = automobile.policyNumber; break; case 2: if ([[tempValues allKeys] containsObject:rowAsNum]) textField.text = [tempValues objectForKey:rowAsNum]; else textField.text = automobile.licensePlate; break; default: break; } if (textFieldBeingEdited == textField) { textFieldBeingEdited = nil; } textField.tag = row; [rowAsNum release]; break; } default: break; } return cell; } Now remember that the first section is working fine and the kode for that method is this: -(IBAction)topTextFieldDone:(id)sender { UITableViewCell *cell = (UITableViewCell *)[[sender superview] superview]; UITableView *table = (UITableView *)[cell superview]; NSIndexPath *textFieldIndexPath = [table indexPathForCell:cell]; NSUInteger row = [textFieldIndexPath row]; row++; if (row > kNumOfEditableRows) row = 0; NSUInteger newIndex[] = {0, row}; NSIndexPath *newPath = [[NSIndexPath alloc] initWithIndexes:newIndex length:2]; UITableViewCell *nextCell = [self.tableView cellForRowAtIndexPath:newPath]; UITextField *nextField = nil; for (UIView *oneView in nextCell.contentView.subviews) { if ([oneView isMemberOfClass:[UITextField class]]) nextField = (UITextField *)oneView; } [nextField becomeFirstResponder]; } It was my idea to just create a second method (secondSectionTextFieldDone:) like this -(IBAction)bottomTextFieldDone:(id)sender { UITableViewCell *cell = (UITableViewCell *)[[sender superview] superview]; UITableView *table = (UITableView *)[cell superview]; NSIndexPath *textFieldIndexPath = [table indexPathForCell:cell]; NSUInteger row = [textFieldIndexPath row]; row++; if (row > 3) row = 0; NSUInteger newIndex[] = {0, row}; NSIndexPath *newPath = [[NSIndexPath alloc] initWithIndexes:newIndex length:2]; UITableViewCell *nextCell = [self.tableView cellForRowAtIndexPath:newPath]; UITextField *nextField = nil; NSString *string = [NSString stringWithFormat:@"AutoEditCellID"]; for (UIView *oneView in nextCell.contentView.subviews) { NSLog(@"%@", nextCell.reuseIdentifier); /* DEBUG LOG */ if ([oneView isMemberOfClass:[UITextField class]] && (nextCell.reuseIdentifier == string)) nextField = (UITextField *)oneView; } [nextField becomeFirstResponder]; } but the result does not solve the issue. so my question is, how can i get the cursor to jump to the next textfield in the section that it is in, If there is one, and if not, then send a message "resignFirstResponder" so that, the keyboard goes away.

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  • UITextField valueDidChange-Event

    - by Infinite
    Is there a way to catch a "valueDidChange"-Event for a Textfield? oO I've got a modalView with an UITextField. When the UITextField is empty, the "Done"-Button in the NavigationBar should be disabled and when there is Text entered, it should become enabled. Right now the only way to accomplish this by using the "textFieldShouldReturn"-Method. This works but is simply horrible for usability. Isn't there a way to check the requirements every time a letter is being entered or removed?

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  • Integrate StyleCop in NAnt buildscript

    - by stmax
    Is there a way to integrate StyleCop in a NAnt script such that the build fails if there are too many style violations? There doesn't seem to be a NAnt task for StyleCop, but we've found StyleCopCmd. However this only seems to generate an XML file as output that we'd have to parse. Is there some easier solution?

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  • How to integrate KVC in MVC?

    - by Paperflyer
    So I have an MVC-application in Cocoa. There are some custom views, a controller and a model. Of course, the views need to know some stuff, so they get their data from the controller. However, they do not use accessors in the controller, they use KVC with a keypath that calls right through to the model: // In view.m time = [timeSource valueForKeyPath:@"theModel.currentTime"]; // timeSource is a pseudo-delegate of the view that holds the controller This simplifies things a great deal and technically, the views still don't know the model in person (that is, in pointer). But of course, they access it directly. Is that a usual (or at least sensible) usage of KVC and MVC? Or how would you implement this kind of communication?

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  • Javascript file as an anonymous function

    - by Andrew Kou
    I have been reading a lot of Javascript lately and I have been noticing that the whole file is wrapped like the following in the .js files to be imported. (function() { ... code ... })() What is the reason for doing this rather than a simple set of constructor functions?

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  • Fetching data (responsebody) with a HttpClient in an AsyncTask and returning the data outside the As

    - by Peter Warbo
    Basically I'm wondering how I'm able to do what I've written in the topic. I've looked through many tutorials on AsyncTask but I can't get it to work. I have a little form (EditText) that will take what the user inputs there and make it to a url query for the application to lookup and then display the results. What I think would seem to work is something like this: In my main activity i have a string called responseBody. Then the user clicks on the search button it will go to my search function and from there call the GrabUrl method with the url which will start the asyncdata and when that process is finished the onPostExecute method will use the function activity.this.setResponseBody(content). This is what my code looks like simpliefied with the most important parts (I think). public class activity extends Activity { private String responseBody; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); initControls(); } public void initControls() { fieldSearch = (EditText) findViewById(R.id.EditText01); buttonSearch = (Button)findViewById(R.id.Button01); buttonSearch.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ search(); }}); } public void grabURL(String url) { new GrabURL().execute(url); } private class GrabURL extends AsyncTask<String, Void, String> { private final HttpClient client = new DefaultHttpClient(); private String content; private boolean error = false; private ProgressDialog dialog = new ProgressDialog(activity.this); protected void onPreExecute() { dialog.setMessage("Getting your data... Please wait..."); dialog.show(); } protected String doInBackground(String... urls) { try { HttpGet httpget = new HttpGet(urls[0]); ResponseHandler<String> responseHandler = new BasicResponseHandler(); content = client.execute(httpget, responseHandler); } catch (ClientProtocolException e) { error = true; cancel(true); } catch (IOException e) { error = true; cancel(true); } return content; } protected void onPostExecute(String content) { dialog.dismiss(); if (error) { Toast toast = Toast.makeText(activity.this, getString(R.string.offline), Toast.LENGTH_LONG); toast.setGravity(Gravity.TOP, 0, 75); toast.show(); } else { activity.this.setResponseBody(content); } } } public void search() { String query = fieldSearch.getText().toString(); String url = "http://example.com/example.php?query=" + query; //this is just an example url, I have a "real" url in my application but for privacy reasons I've replaced it grabURL(url); // the method that will start the asynctask processData(responseBody); // process the responseBody and display stuff on the ui-thread with the data that I would like to get from the asyntask but doesn't obviously }

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  • Using Objective-C Blocks

    - by Sean
    Today I was experimenting with Objective-C's blocks so I thought I'd be clever and add to NSArray a few functional-style collection methods that I've seen in other languages: @interface NSArray (FunWithBlocks) - (NSArray *)collect:(id (^)(id obj))block; - (NSArray *)select:(BOOL (^)(id obj))block; - (NSArray *)flattenedArray; @end The collect: method takes a block which is called for each item in the array and expected to return the results of some operation using that item. The result is the collection of all of those results. (If the block returns nil, nothing is added to the result set.) The select: method will return a new array with only the items from the original that, when passed as an argument to the block, the block returned YES. And finally, the flattenedArray method iterates over the array's items. If an item is an array, it recursively calls flattenedArray on it and adds the results to the result set. If the item isn't an array, it adds the item to the result set. The result set is returned when everything is finished. So now that I had some infrastructure, I needed a test case. I decided to find all package files in the system's application directories. This is what I came up with: NSArray *packagePaths = [[[NSSearchPathForDirectoriesInDomains(NSAllApplicationsDirectory, NSAllDomainsMask, YES) collect:^(id path) { return (id)[[[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil] collect:^(id file) { return (id)[path stringByAppendingPathComponent:file]; }]; }] flattenedArray] select:^(id fullPath) { return [[NSWorkspace sharedWorkspace] isFilePackageAtPath:fullPath]; }]; Yep - that's all one line and it's horrid. I tried a few approaches at adding newlines and indentation to try to clean it up, but it still feels like the actual algorithm is lost in all the noise. I don't know if it's just a syntax thing or my relative in-experience with using a functional style that's the problem, though. For comparison, I decided to do it "the old fashioned way" and just use loops: NSMutableArray *packagePaths = [NSMutableArray new]; for (NSString *searchPath in NSSearchPathForDirectoriesInDomains(NSAllApplicationsDirectory, NSAllDomainsMask, YES)) { for (NSString *file in [[NSFileManager defaultManager] contentsOfDirectoryAtPath:searchPath error:nil]) { NSString *packagePath = [searchPath stringByAppendingPathComponent:file]; if ([[NSWorkspace sharedWorkspace] isFilePackageAtPath:packagePath]) { [packagePaths addObject:packagePath]; } } } IMO this version was easier to write and is more readable to boot. I suppose it's possible this was somehow a bad example, but it seems like a legitimate way to use blocks to me. (Am I wrong?) Am I missing something about how to write or structure Objective-C code with blocks that would clean this up and make it clearer than (or even just as clear as) the looped version?

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  • Lisp Style question label local functions or not?

    - by Andrew Myers
    I was wondering if there is a standard practice regarding the use of labels in Lisp. I've been messing around with a Lisp implementation of the algorithm described in the first answer here http://stackoverflow.com/questions/352203/generating-permutations-lazily My current version uses labels to break out portions of functionality. (defun next-permutation (pmute) (declare (vector pmute)) (let ((len (length pmute))) (if (> len 2) (labels ((get-pivot () (do ((pivot (1- len) (1- pivot))) ((or (= pivot 0) (< (aref pmute (1- pivot)) (aref pmute pivot))) pivot))) (get-swap (pivot) (let ((swp (1- len))) (loop for i from (1- len) downto pivot do (if (or (and (> (aref pmute i) (aref pmute (1- pivot))) (< (aref pmute i) (aref pmute swp))) (< (aref pmute swp) (aref pmute (1- pivot)))) (setf swp i))) swp)) (next (swp pivot) (rotatef (aref pmute (1- pivot)) (aref pmute swp)) (reverse-vector pmute pivot (1- len)))) (let ((piv (get-pivot))) (if (> piv 0) (next (get-swap piv) piv) nil)))))) Since each label is only called once I was wondering if this is considered bad practice since the only reason to do it in this case is for aesthetic reasons. I would argue that the current version with labels is clearer but that may go against common wisdom that I'm not aware of, being new to Lisp.

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  • Are endless loops in bad form?

    - by rlbond
    So I have some C++ code for back-tracking nodes in a BFS algorithm. It looks a little like this: typedef std::map<int> MapType; bool IsValuePresent(const MapType& myMap, int beginVal, int searchVal) { int current_val = beginVal; while (true) { if (current_val == searchVal) return true; MapType::iterator it = myMap.find(current_val); assert(current_val != myMap.end()); if (current_val == it->second) // end of the line return false; current_val = it->second; } } However, the while (true) seems... suspicious to me. I know this code works, and logically I know it should work. However, I can't shake the feeling that there should be some condition in the while, but really the only possible one is to use a bool variable just to say if it's done. Should I stop worrying? Or is this really bad form. EDIT: Thanks to all for noticing that there is a way to get around this. However, I would still like to know if there are other valid cases.

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