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• Inserting a line break from a variable objective c

  - by user337174

  I am pulling data into my iphone application using xml. The xml value is then placed in a variable. example variable: 123 London road \n London \n England The variable is then set as a label. I want the line breaks to appear in the label, instead it is printing \n. If i manually set the label value locationLabel.text = @"123 London road \n London \n England" It works as i want it to. Can anyone explain this?

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• C++: Is windows.h generally an efficient code library?

  - by Alerty

  I heard some people complaining about including the windows header file in a C++ application. They mentioned that it is inefficient. Is this just some urban legend or are there really some real hard facts behind it? In other words, if you believe it is efficient or inefficient please explain how this can be with facts. I am no C++ Windows programmer guru. It would really be appreciated to have detailed explanations.

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• How to creating code highlighted blocks on your website

  - by Saif Bechan

  I have written a small PHP framework and I want to make a website where I explain some basic features. I want to display blocks of php code. Is there an easy to do this, preferably without JavaScript. I want to have section kind of like displayed below: // This function takes in a value and return it public function getname($name){ return $name; }

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• When using spring and hibernate, how are sessions/transactions handled?

  - by Blankman

  when using hibernate with spring, can someone explain how the session unit of work and transactions are handled? is the transaction started at the beginning of the page request, and committed at the end? can I have multiple db calls per request, that each have different transaction levels? e.g. some are left as default, while others are read-uncommitted?

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• Cannot find a free socket for the debugger in eclipse

  - by rose

  Hi, when i try to debug the java programe , it says "Cannot find a free socket for the debugger in eclipse".Could you explain how to resolve the error ?

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• c++ operator overload and usage

  - by MemoryLeak

  bool operator()(Iterator it1, Iterator it2) const { return (*it1 < *it2); } Can someone explain this function for me, thanks! is this means overload the operator ()? after overload this, how to use it ?

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• declerative_authorization on User problem

  - by Webpain

  I am trying to block all default methods except create and update in my users controller using declerative_authorization. But at the time I add filter_resource_access or filter_access_to into my usersController i always get "Couldn't find User without an ID". Anyone care to explain why this could be happening? class UsersController :new end end def show @user = @current_user end def edit @user = @current_user end def update @user = @current_user # makes our views "cleaner" and more consistent if @user.update_attributes(params[:user]) flash[:notice] = "Account updated!" redirect_to account_url else render :action = :edit end end end

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• "program to interfaces, not implementations"

  - by ajsie

  usually one stumble upon this phrase when reading about design patterns. but i don't understand it. could someone explain this for me :)

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• How do I select a random record efficiently in MySQL?

  - by user198729

  mysql> EXPLAIN SELECT * FROM urls ORDER BY RAND() LIMIT 1; +----+-------------+-------+------+---------------+------+---------+------+-------+---------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+------+---------------+------+---------+------+-------+---------------------------------+ | 1 | SIMPLE | urls | ALL | NULL | NULL | NULL | NULL | 62228 | Using temporary; Using filesort | +----+-------------+-------+------+---------------+------+---------+------+-------+---------------------------------+ The above doesn't qualify as efficient,how should I do it properly?

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• Little (Employee - Shift) SQL Database help

  - by latinunit-net

  Hi Guys, Im creating a little database that has employee, emp_shift, shift, tables now im suppose to be able to calculate at the end of the month which employee has done the most number of shifts. Ive created the SQL creation, insert statements for the tables, and a little diagram to explain what im trying to acomplish, im a beginner and this is a homework ive been trying to do for the last 4 days. Diagram: http://latinunit.net/emp_shift.jpg SQL: latinunit.net/emp_shift.txt can you please guys check it, deadline is 2 days and this is just a part of the whole database

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• Oracle multiset, collection and records

  - by Atul

  Can anybody Explain me why records are required. Can't we perform the same operation in pl/sql using loop and all. Also when multiset, records query can be used i.e. in which type of situation and which one will be the preference.

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• Tkinter layout question

  - by directx

  Tricky to explain with words so I'll use a picture. A: row 0, column 0 B: row 0, column 1 C: row 1, column 0, span 2

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• SQL query, select from 2 tables random

  - by klaus

  Hello all i have a problem that i just CANT get to work like i what it.. i want to show news and reviews (2 tables) and i want to have random output and not the same output here is my query i really hope some one can explain me what i do wrong SELECT anmeldelser.billed_sti , anmeldelser.overskrift , anmeldelser.indhold , anmeldelser.id , anmeldelser.godkendt FROM anmeldelser LIMIT 0,6 UNION ALL SELECT nyheder.id , nyheder.billed_sti , nyheder.overskrift , nyheder.indhold , nyheder.godkendt FROM nyheder ORDER BY rand() LIMIT 0,6

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• Zend Framework, what $this->_forward is doing

  - by RageZ

  Hello everyone, I would like someone to explain me what _forward is exactly doing, I cannot see if _forward is also rendering the attached view to the action or just executing the action. Also is it possible to pass argument to $this-action in a view script ? More generally my problem is how to code a confirmation page, let's say the user input some stuff and you want to show him confirmation, is forward is mean for that case ? Thanks

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• Java Build Path - Add External JARs' and Add Variable

  - by Lakshman

  What is the difference between Java Build Path - Add External JARs Button and Add Variable Button Functionality, Why its required. Please explain in detail.

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• i = true and false in Ruby is true?

  - by alex

  Am I fundamentally misunderstanding Ruby here? I've been writing Ruby code for about 2 years now and just today stumbled on this... ruby-1.8.7-p249 > i = true and false => false ruby-1.8.7-p249 > i => true Could somebody explain what's going on here please? I'm sure it's to spec, but it just seems counter intuitive to me...

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• Powerbuilder ressources

  - by afilatun

  I'm recently working in a company where we use PowerBuilder extensively. The only documentation or ressources we have access to is some basic course saying things like "Do A, then B and you'll get C". I was wondering if there is some better crash courses or tutorials for this language on the net or somewhere else which actually explain something instead of simply taking me by the hand.

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• Powerbuilder resources

  - by afilatun

  I'm recently working in a company where we use PowerBuilder extensively. The only documentation or resources we have access to is some basic course saying things like "Do A, then B and you'll get C". I was wondering if there is some better crash courses or tutorials for this language on the net or somewhere else which actually explain something instead of simply taking me by the hand.

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• Why not use GDI+ from ASP.NET

  - by roygbiv

  I've been told that using GDI+ from ASP.NET is dangerous and undefined. Is that because there is no guarantee of a Device Context? Can someone explain? What are some of the alternatives? Here is the source: http://msdn.microsoft.com/en-us/library/system.drawing.aspx

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• How do templating engines in JavaScript work?

  - by Randy Gurment

  Hello, Could you please explain me, how do templating engines in JavaScript work? Thank you. JSON { "color" : "red"} Template <strong><%=color%></strong> Result <strong>Red</strong>

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• Why does trying to understand delegates feel like trying to understand the nature of the universe?

  - by Kin

  I've read two books, tons of examples. They still make next to no sense to me. I could probably write some code that uses delegates, but I have no idea why. Am I the only one with this problem, or am I just an idiot? If anyone can actually explain to me when, where, and why I would actually use a delegate, I'll love you forever.

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• Object Events, how do are they implemented

  - by Malfist

  Events are really awesome, and I wouldn't know what I would do without them, but they're a mystery to me. I'm talking about events in a sense, a function(s) is called if a property, or value, a special event happens. I have only the vaguest idea how these actually work. I know it's an observer pattern, but I don't truly know how it works and/or how to implement it. Can someone explain that to me?

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• Access.Application.CurrentDb is Nothing?

  - by Allain Lalonde

  I'm at a loss to explain this one: I'm getting an error "91" (Object or With block not set) on the second line below: Dim rs As DAO.Recordset Set rs = CurrentDb.OpenRecordset("SELECT * FROM employees") The following also causes it: Set rs = CurrentDb.OpenRecordset("employees") Executing ?CurrentDb.Name alone in the immediate window causes the error as well. Now, clearly the database is open since I'm editing the form within it, so what can cause this error here?

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• commands executing in piping in UNIX

  - by Happy Mittal

  when I write a command $ echo date then it prints "date" as it is i.e it doesn't run date program. But when I write $ echo date | wc then correct answer is produced as if date was run. How piping is making difference here ? Please explain.

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• Why does enabling 32-bit applications on IIS7 break classic ASP on .html files?

  - by rg89

  When I enable 32 bit applications on the application pool of a website running on Server 2008 web IIS7, a handler mapping for *.html - asp.dll no longer works. Can anyone explain why?

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