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WebSockets vs. Server-Sent events/EventSource

Both WebSockets and Server-Sent Events are capable of pushing data to browsers. To me they seem to be competing technologies. What is the difference between them? When would you choose one over the other? ...
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iOS difference between isKindOfClass and isMemberOfClass

What is the difference between the isKindOfClass:(Class)aClass and the isMemberOfClass:(Class)aClass functions? I know it is something small like, one is global while the other is an exact class match but I need someone to specify which is which please. ...
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Why sizeof int is wrong, while sizeof(int) is right?

We know that sizeof is an operator used for calculating the size of any datatype and expression, and when the operand is an expression, the parentheses can be omitted. ...
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When to use a “has_many :through” relation in Rails?

I am trying to understand what has_many :through is and when to use it (and how). However, I am not getting it. I am reading Beginning Rails 3 and I tried Googling, but I am not able to understand. ...
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TypeScript with KnockoutJS

Is there any sample of using TypeScript with KnockoutJS? I'm just curious as to how they would work together? 6 Answers ...
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Notification click: activity already open

I have an application with notifications that open a certain activity if I click them. I want that, if I click the notification and the activity is already opened, it's not started again, but just brought to front. ...
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Difference between std::result_of and decltype

I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example: ...
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Updating the list view when the adapter data changes

When the data associated with array adapter is changed, invalidating the listview is sufficient to show the updated values? Following piece of code is not working, did i misunderstood something here.? ...
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How to use jQuery in chrome extension?

I am writing a chrome extension. And I want to use jQuery in my extension. I am not using any background page , just a background script . ...
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target input by type and name (selector)

I need to change some checkbox inputs to hidden inputs for some but not all inputs on a page. 3 Answers ...