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Concurrent vs serial queues in GCD

I'm struggling to fully understand the concurrent and serial queues in GCD. I have some issues and hoping someone can answer me clearly and at the point. ...
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How to convert a PNG image to a SVG? [closed]

How to convert a PNG image to a SVG? 15 Answers 15 ...
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Token Authentication vs. Cookies

What is the difference between token authentication and authentication using cookies? 8 Answers ...
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AngularJS: Understanding design pattern

... Thanks to a huge amount of valuable sources I've got some general recommendations for implementing components in AngularJS apps: Controller Controller should be just an interlayer between model and view. Try to make it as thin ...
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How should I ethically approach user password storage for later plaintext retrieval?

As I continue to build more and more websites and web applications I am often asked to store user's passwords in a way that they can be retrieved if/when the user has an issue (either to email a forgotten password link, walk them through over the phone, etc.) When I can I fight bitterly against thi...
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When to use inline function and when not to use it?

I know that inline is a hint or request to compiler and its used to avoid function call overheads. 14 Answers ...
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What is the purpose of backbone.js?

I tried to understand the utility of backbone.js from its site http://documentcloud.github.com/backbone , but I still couldn't figure out much. ...
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How to modify a global variable within a function in bash?

...e e is set within a subshell, but not the parent shell. There are two ways to pass values from a subshell to its parent. First, you can output something to stdout, then capture it with a command substitution: myfunc() { echo "Hello" } var="$(myfunc)" echo "$var" Gives: Hello For a numeri...
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Can you add new statements to Python's syntax?

Can you add new statements (like print , raise , with ) to Python's syntax? 13 Answers ...
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What are MVP and MVC and what is the difference?

... RAD (drag-drop and configure) way of building user interfaces that many tools encourage you are likely to come across three design patterns called Model-View-Controller , Model-View-Presenter and Model-View-ViewModel . My question has three parts to it: ...