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GCD to perform task in main thread

I have a callback which might come from any thread. When I get this callback, then I would like to perform a certain task on the main thread. ...
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How to read a single char from the console in Java (as the user types it)?

Is there an easy way to read a single char from the console as the user is typing it in Java? Is it possible? I've tried with these methods but they all wait for the user to press enter key: ...
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What is content-type and datatype in an AJAX request?

What is content-type and datatype in a POST request? Suppose I have this: 3 Answers 3 ...
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What are the differences between vector and list data types in R?

What are the main differences between vector and list data types in R? What are the advantages or disadvantages of using (or not) these two data types? ...
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What is database pooling?

I just wanted to know the concept of database connection pooling and how it is achieved. 6 Answers ...
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Custom li list-style with font-awesome icon

I am wondering if it's possible to utilize font-awesome (or any other iconic font) classes to create a custom <li> list-style-type? ...
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How to use XPath contains() here?

I'm trying to learn XPath. I looked at the other contains() examples around here, but nothing that uses an AND operator. I can't get this to work: ...
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How to pass argument to Makefile from command line?

How to pass argument to Makefile from command line? 4 Answers 4 ...
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Unicode与UTF-8互转(C语言实现) - C/C++ - 清泛网 - 专注C/C++及内核技术

Unicode与UTF-8互转(C语言实现)1. 基础1.1 ASCII码我们知道, 在计算机内部, 所有的信息最终都表示为一个二进制的字符串. 每一个二进制位(bit)有0和1两种状态, 因此...1. 基础 1.1 ASCII码 我们知道, 在计算机内部, 所有的信息最终都表...
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How do I deserialize a JSON string into an NSDictionary? (For iOS 5+)

In my iOS 5 app, I have an NSString that contains a JSON string. I would like to deserialize that JSON string representation into a native NSDictionary object. ...