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How do I create delegates in Objective-C?

...se you have a UIWebView. If you'd like to implement its delegate's webViewDidStartLoad: method, you could create a class like this: @interface MyClass<UIWebViewDelegate> // ... @end @implementation MyClass - (void)webViewDidStartLoad:(UIWebView *)webView { // ... } @end Then you coul...
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how to convert binary string to decimal?

...is.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input id="txtNumber" type="text" placeholder="Number" /> <input id="txtFromBase" type="text" placeholder="From Base" /> <input id="txtToBase" type="text" placeholder="To Base" /> <input id="btnConvert" type="bu...
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MySQL Fire Trigger for both Insert and Update

...et easier maintenance and a guarantee that the two triggers' code won't accidentally diverge. – derobert Oct 9 '19 at 14:30  |  show 1 more co...
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CSS to stop text wrapping under image

...laimer: This answer was specific to the OP's question (Which had the width set in the examples). While it works, it requires you to have a width on each of the elements, the image and the paragraph. Unless that is your requirement, I recommend using Joe Conlin's solution which is posted as anot...
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SQL keys, MUL vs PRI vs UNI

...rences another table's primary key is MUL mysql> create table penguins(id int primary key); Query OK, 0 rows affected (0.01 sec) mysql> create table skipper(id int, foreign key(id) references penguins(id)); Query OK, 0 rows affected (0.01 sec) mysql> desc skipper; +-------+---------+----...
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Play an audio file using jQuery when a button is clicked

...learnt .currentTimeabove, to learn its length we use .duration. Example Guide When document is ready we created an audio element dynamically We set its source with the audio we want to play. We used 'ended' event to start file again. When the currentTime is equal to its duration audio file ...
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When to use Storyboard and when to use XIBs

...ryboards inherently still have flaws, I revise my advice from don't use to selectively use where it makes sense. Even now that iOS 9 is out, I would advise against to use caution when deciding whether to use Storyboards. Here are my reasons: Storyboards fail at runtime, not at compile time: You h...
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ListView inside ScrollView is not scrolling on Android

I am having trouble with a scrolling ListView inside a ScrollView . I have an Activity which has some EditTexts in the top part and then a tab host with two tabs which have one ListView each. When the EditText views are focused, the soft keyboard comes up and as I have a ScrollView, the content ...
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getSupportActionBar from inside of Fragment ActionBarCompat

... After Fragment.onActivityCreated(...) you'll have a valid activity accessible through getActivity(). You'll need to cast it to an ActionBarActivity then make the call to getSupportActionBar(). ((AppCompatActivity)getActivity()).getSupportActionBar().setSubtitle(R.string.subtit...
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Programmatically create a UIView with color gradient

I'm trying to generate a view with a gradient color background (A solid color to transparent) at runtime. Is there a way of doing that? ...