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What does PHP keyword 'var' do?

This is probably a very trivial question, but I haven't been able to find the answer neither through web search engines, nor on php.net. Please just direct me to where I can read about this, if you haven't got time to explain. ...
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Android Paint: .measureText() vs .getTextBounds()

...ht and width of the text to be rendered. However, the actual text rendered is always a bit wider than the .width() of the Rect information filled by getTextBounds() . ...
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Are email addresses case sensitive?

I've read that by standard first part of e-mail is case sensitive, however I've tried to send e-mail to name@example.com , Name@example.com and NAME@example.com - it has arrived in each case. ...
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Why compile Python code?

... script? You can run them directly from the .py file and it works fine, so is there a performance advantage or something? ...
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Struct like objects in Java

Is it completely against the Java way to create struct like objects? 20 Answers 20 ...
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Detecting if an NSString contains…?

... Here's how I would do it: NSString *someString = @"Here is my string"; NSRange isRange = [someString rangeOfString:@"is " options:NSCaseInsensitiveSearch]; if(isRange.location == 0) { //found it... } else { NSRange isSpacedRange = [someString rangeOfString:@" is " options:NS...
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What is the naming convention in Python for variable and function names?

...ty. Variable names follow the same convention as function names. mixedCase is allowed only in contexts where that's already the prevailing style (e.g. threading.py), to retain backwards compatibility. share | ...
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Is Safari on iOS 6 caching $.ajax results?

...are seeing Safari's web view take the liberty of caching $.ajax calls. This is in the context of a PhoneGap application so it is using the Safari WebView. Our $.ajax calls are POST methods and we have cache set to false {cache:false} , but still this is happening. We tried manually adding a ...
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Private vs Protected - Visibility Good-Practice Concern [closed]

... No, you're not on the right track. A good rule of thumb is: make everything as private as possible. This makes your class more encapsulated, and allows for changing the internals of the class without affecting the code using your class. If you design your class to be inheritable...
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Factory Pattern. When to use factory methods?

When is it a good idea to use factory methods within an object instead of a Factory class? 15 Answers ...