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How to design a multi-user ajax web application to be concurrently safe

...resolver JS, is allowed another attempt to change the value. Once the user selected a value he deems right, the process starts over from case 2 (or case 3 if someone else was faster, again) Some words on Performance & Scalability HTTP Polling vs. HTTP "pushing" Polling creates requests, one...
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Big O, how do you calculate/approximate it?

...n't a moron, its average case complexity is O(n log n) and it uses a pivot selection strategy that reduces the odds of hitting the O(n²) case). And both bsearch and qsort can be worse if the comparator function is pathological. – ShadowRanger Mar 21 '19 at 14:...
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Is it safe to use Project Lombok? [closed]

...ield name) and finally, use the Breakpoints view to right-click the BP and select Breakpoint Properties... to add a condition. Nice. UPDATE 4 (Aug 16 '13) Netbeans doesn't like it when you update your Lombok dependencies in your Maven pom. The project still compiles, but files get flagged for hav...
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What is a magic number, and why is it bad? [closed]

...Now, what you do is you have the 50 in different places - your SQL script (SELECT TOP 50 * FROM orders), your Website (Your Last 50 Orders), your order login (for (i = 0; i < 50; i++)) and possibly many other places. Now, what happens when someone decides to change 50 to 25? or 75? or 153? You n...
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What are the benefits of dependency injection containers?

...ause the really cool aspects of DI require the ability to programmatically select objects and configure and inject them into other objects using a system external and independent to the objects themselves. A language must provide good support for both normal Object Oriented programming techniques a...
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Dependency Inject (DI) “friendly” library

...or facility points this service provider locator to Windsor, making it the selected service provider. Bottom line: there is no perfect solution. As with any design decision, this issue demands a balance between flexibility, maintainability and convenience. ...
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How to pass parameters correctly?

...king an rvalue reference (CreditCard&&). Overload resolution will select the former when passing an lvalue (in this case, one copy will be performed) and the latter when passing an rvalue (in this case, one move will be performed). Account(std::string number, float amount, CreditCard cons...
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What is Node.js? [closed]

...de-facto standard for client-side user interface. jQuery provides CSS-like selectors to 'query' for sets of DOM elements that can then be operated on (set handlers, properties, styles, etc). Along the same vein, Twitter's Bootstrap CSS framework, Backbone.js for an MVC pattern, and Browserify.js to ...
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How well is Unicode supported in C++11?

...port is quite good, though: it supports detecting endianess from a BOM, or selecting it explicitly in code. It also supports producing output with and without a BOM. There are some more interesting conversion possibilities absent. There is no way to deserialize from an UTF-16 byte stream or string ...
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How to create a self-signed certificate with OpenSSL

...ommand. It can be tricky to create one that can be consumed by the largest selection of clients, like browsers and command line tools. It's difficult because the browsers have their own set of requirements, and they are more restrictive than the IETF. The requirements used by browsers are documente...