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  • Why should I call self=[super init]

    - by Michael
    Let's say I create my class and its init method. Why should I call and return value of superclass init assigned to self? Which cases it covers? I would appreciate examples why would I need it for Cocoa superclass and non-Cocoa.

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  • Subclassing Cocoa means no subclass ivars in some cases?

    - by Michael
    The question is generally coming from self = [super init]. In case if I'm subclassing NSSomething and in my init's method self = [super init] returns object of different class, does it mean I am not able to have my very own ivars in my subclass, just because self will be pointing to different class? Appreciate if you could bring some examples if my statement is wrong.

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  • Sinatra: rendering snippets (partials)

    - by Michael
    I'm following along with an O'Reilly book that's building a twitter clone with Sinatra. As Sinatra doesn't have 'partials' (in the way that Rails does), the author creates his own 'snippets' that work like partials. I understand that this is fairly common in Sinatra. Anyways, inside one of his snippets (see the first one below) he calls another snippet text_limiter_js (which is copied below). Text_limiter_js is basically a javascript function. If you look at the javascript function in text_limiter_js, you'll notice that it takes two parameters. I don't understand where these parameters are coming from because they're not getting passed in when text_limiter_js is rendered inside the other snippet. I'm not sure if I've given enough information/code for someone to help me understand this, but if you can, please explain. =snippet :'/snippets/text_limiter_js' %h2.comic What are you doing? %form{:method => 'post', :action => '/update'} %textarea.update.span-15#update{:name => 'status', :rows => 2, :onKeyDown => "text_limiter($('#update'), $('#counter'))"} .span-6 %span#counter 140 characters left .prepend-12 %input#button{:type => 'submit', :value => 'update'} text_limiter_js.haml :javascript function text_limiter(field,counter_field) { limit = 139; if (field.val().length > limit) field.val(field.val().substring(0, limit)); else counter_field.text(limit - field.val().length); }

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  • capture the last WM_SIZE

    - by Michael
    When I resize my window I want to tell another part of my program that my window has changed size. I read on MSDN that: WM SIZE Message The WM SIZE message is sent to a window after its size has changed. However, I receive the WM_SIZE even when dragging. I noticed that there is also a WM_SIZING message that is sent when my window is resizing. At the moment I do not see the difference between WM_SIZE and WM_SIZING. Is there some way I can capture the very last WM_SIZE message, as to not "spam" my program with resize messages?

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  • Pressed Listener for a View

    - by michael
    Hi, In android, is there such a thing for listening if a View is pressed? In background drawable, i can set assert depends on the view is pressed or not. Is it possible for me to add a Listener for a View when I pressed it? Thank you.

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  • Which class will be instanciated

    - by Michael
    Say I have 2 subclasses from UIViewController, class A and class B. In Main nib file an object is representing class A and it is set to load file from Secondary nib file. The owner of Secondary nib is of class B. The question is - from which class an object in Main nib file will be instanciated once the nib files unarchived in the memory? The reason this question arised is that I have to take care myself if such reference to external NIB file present, to ensure that the first nib's object and second nib's owner is same. Please correct me if my statement is wrong.

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  • Why is graphical emacs so ugly?

    - by Michael Gummelt
    Every hacker I know uses terminal emacs. Graphical emacs is hideous. The default text is huge and out of place, and the borders are much bigger and blockier than in any other application. Everything I've read about switching the font is confusing and completely different than the font selection used by other applications (I'm on Ubuntu). Does anyone actually use graphical emacs (vs -nw)? If so, how do you make it bearable?

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  • (Java) Is there a type of object that can handle anything from primitives to arrays?

    - by Michael
    I'm pretty new to Java, so I'm hoping one of you guys knows how to do this. I'm having the user specify both the type and value of arguments, in any XML-like way, to be passed to methods that are external to my application. Example: javac myAppsName externalJavaClass methodofExternalClass [parameters] Of course, to find the proper method, we have to have the proper parameter types as the method may be overloaded and that's the only way to tell the difference between the different versions. Parameters are currently formatted in this manner: (type)value(/type), e.g. (int)71(/int) (string)This is my string that I'm passing as a parameter!(/string) I parse them, getting the constructor for whatever type is indicated, then execute that constructor by running its method, newInstance(<String value>), loading the new instance into an Object. This works fine and dandy, but as we all know, some methods take arrays, or even multi-dimensional arrays. I could handle the argument formatting like so: (array)(array)(int)0(/int)(int)1(/int)(/array)(array)(int)2(/int)(int)3(/int)(/array)(/array)... or perhaps even better... {{(int)0(/int)(int)1(/int)}{(int)2(/int)(int)3(/int)}}. The question is, how can this be implemented? Do I have to start wrapping everything in an Object[] array so I can handle primitives, etc. as argObj[0], but load an array as I normally would? (Unfortunately, I would have to make it an Object[][] array if I wanted to support two-dimensional arrays. This implementation wouldn't be very pretty.)

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  • How to map auto property private set with NHibernate?

    - by Michael Teper
    Suppose I have this class: public class GroceryListItem() { public GroceryList { get; private set; } public GroceryListItem(GroceryList groceryList) { GroceryList = groceryList; } } What is the NHibernate mapping file access strategy for this scenario? (i.e. <one-to-many name="GroceryList" column="XXX" access="?????" />)

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  • Alternatives to persisting objects than using __destruct() in PHP

    - by Michael
    I usually use a classes destructor method __destruct() to persist objects to session or what have you. It is just very convinient, but I'm curious to if there are any other methods that are equally appealing. Do you know of such? The curiousity arose as I was to merge/utilize two frameworks that both made use of __destruct() for persistance resulting in a race-problem.

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  • Makefile: couple syntax questions

    - by Michael
    package_version := $(version)x0d$(date) what is the x0d part between version and date vars? is it just string? What $(dotin_files:.in=) does below code dotin_files := $(shell find . -type f -name \*.in) dotin_files := $(dotin_files:.in=) what this means $(dotin_files:=.in) code $(dotin_files): $(dotin_files:=.in) $(substitute) [email protected] > $@ can target contain multiple files? what is the meaning of declaring target variable as PHONY? code .PHONY: $(dotin_files) In the regex replacement code below code substitute := perl -p -e 's/@([^@]+)@/defined $$ENV{$$1} ? $$ENV{$$1} : $$&/ge' what are $$ENV{$$1} and $$&? I guess it's Perl scope... thanks for your time

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  • sed: group capturing

    - by Michael
    Is there any way to tell sed to output only captured groups? for example given by input: This is a sample 123 text and some 987 numbers and pattern /([\d]+)/ I could get only 123 and 987 output in the way formatted by back references perhaps?

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  • JUnit - assertSame

    - by Michael
    Can someone tell me why assertSame() do fail when I use values 127? import static org.junit.Assert.*; ... @Test public void StationTest1() { .. assertSame(4, 4); // OK assertSame(10, 10); // OK assertSame(100, 100); // OK assertSame(127, 127); // OK assertSame(128, 128); // raises an junit.framework.AssertionFailedError! assertSame(((int) 128),((int) 128)); // also junit.framework.AssertionFailedError! } I'm using JUnit 4.8.1.

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  • Performing a MYSQL query based off of $_GET results

    - by Michael N
    When a user clicks an item on my items page, it takes them to blank page template using $_GET to pass the item brand and model through. I'd like to perform another MYSQL query when that user clicks through to populate the blank page with the product details from my database. I'd like to retrieve the single row using the model number (unique ID) to populate the page with the information. I've tried a couple of things but am having a little difficulty. On my blank item page, I have $brand = $_GET['Brand']; $modelnumber = $_GET['ModelNumber']; $query = mysql_query("SELECT * FROM items WHERE `Model Number` = '$modelnumber'"); $results = mysql_fetch_row($query); echo $results; I think having ''s around Model Number is causing troubles, but without them, I get a Warning: mysql_fetch_row() expects parameter 1 to be resource, boolean given error. My database columns looks like Brand | Model Number | Price | Description | Image A few other things I have tried include $query = mysql_query("SELECT * FROM item WHERE Model Number = $_GET['ModelNumber']"); Which gave me a syntax error. I've also tried concatenating the $_GET which gives me a mysql_fetch_row() expects parameter 1 to be resource, boolean given error Which leads me to believe that I'm also going about displaying the results incorrectly. I'm not sure if I need to put it in a where loop like I have with my previous page which displays all items in the database because this is just displaying one.

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  • A php namespace called default

    - by michael
    <?php namespace default gives me an unexpecected T_DEFAULT, is there any way of working around this? Can I escape the reserved word somehow? My system uses the name of the current module in my site for the namespace so it would be nice to be able to use any string as a namespace.

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  • Outer select column value in joined subquery?

    - by Michael DePetrillo
    Is it possible to use a column value from an outer select within a joined subquery? SELECT table1.id, table2.cnt FROM table1 LEFT JOIN (SELECT COUNT(*) as `cnt` FROM table2 where table2.lt > table1.lt and table2.rt < table1.rt) as table2 ON 1; This results in "Unknown column 'table1.lt' in 'where clause'". Here is the db dump. CREATE TABLE IF NOT EXISTS `table1` ( `id` int(1) NOT NULL, `lt` int(1) NOT NULL, `rt` int(4) NOT NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1; CREATE TABLE IF NOT EXISTS `table2` ( `id` int(1) NOT NULL, `lt` int(1) NOT NULL, `rt` int(4) NOT NULL) ENGINE=MyISAM DEFAULT CHARSET=latin1; INSERT INTO `table1` (`id`, `lt`, `rt`) VALUES (1, 1, 4); INSERT INTO `table2` (`id`, `lt`, `rt`) VALUES (2, 2, 3);

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  • How to setHeight for a ViewGroup

    - by michael
    Hi, Can you please tell me how can I setHeight for a ViewGroup? I see there is a layout(l,t,r,b); But that is different form setHeight(), since I don't know where should be the top/bottom of the viewGroup. I need to set the height of the ViewGroup and return that to ListAdapter. Thank you.

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  • Facebook application development resources

    - by Michael
    What is the most efficient way to start learning develop Facebook applications? Any web resource or book that you would recommend to start from? Any MUST READ or Bibles available for this? There are plenty of them in Amazon, but which one really worth to spend time? What kind of development technologies are used in this? Is PHP/MySQL/JS enough to jump in? Thanks

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  • Join two results sets to make one result set in T-SQL

    - by Michael Kniskern
    What would be the best approach to combine the two results sets in one result set in T-SQL? SQL statment #1: SELECT COUNT(t.col1) as 'Number of Responses', t.col2 as 'Department' FROM table t WHERE col3 IS NOT NULL GROUP BY t.col1 ORDER BY t.col1 SQL Statment #1: SELECT COUNT(t.col1) as 'Total number of participants', t.col2 as 'Department' FROM table t GROUP BY t.col1 ORDER by t.col1 Desired result set Number of Responses | Total Number of participants | Department

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