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How to find time complexity of an algorithm

... How to find time complexity of an algorithm You add up how many machine instructions it will execute as a function of the size of its input, and then simplify the expression to the largest (when N is very large) term and can include any...
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Should services always return DTOs, or can they also return domain models?

..., it encapsulates the domain. In other words it protects the domain. Sometimes service needs to return data object that wasn't defined in the domain Can you provide an example of this data object? If we should strictly stick to DTOs, should they be defined in service layer? Yes, because ...
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Should I use Java date and time classes or go with a 3rd party library like Joda Time?

...m all over the world. One type of data which must be stored is dates and times. 5 Answers ...
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How to configure MongoDB Java driver MongoOptions for production use?

...s for configuring MongoOptions for the MongoDB Java driver and I haven't come up with much other than the API. This search started after I ran into the "com.mongodb.DBPortPool$SemaphoresOut: Out of semaphores to get db connection" error and by increasing the connections/multiplier I was able to sol...
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When to use next() and return next() in Node.js

... Some people always write return next() is to ensure that the execution stops after triggering the callback. If you don't do it, you risk triggering the callback a second time later, which usually has devastating results. Your ...
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How should I choose an authentication library for CodeIgniter? [closed]

...and created a new auth library for CI based on DX Auth, following the recommendations and requirements below. And the resulting Tank Auth is looking like the answer to the OP's question. I'm going to go out on a limb here and call Tank Auth the best authentication library for CodeIgniter available t...
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Actionbar notification count icon (badge) like Google has

Is there a android standard badge or method to show action bar notification icon with a count like on Google examples? 9 An...
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Why do we need boxing and unboxing in C#?

...d now you have an int and you want to put it into o. o is a reference to something somewhere, and the int is emphatically not a reference to something somewhere (after all, it's just a number). So, what you do is this: you make a new object that can store the int and then you assign a reference to t...
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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?

Can someone give me a quick summary of what a ViewModelLocator is, how it works, and what the pros/cons are for using it compared to DataTemplates? ...
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What is the difference between Ruby 1.8 and Ruby 1.9

...ance Threads/Fibers Encoding/Unicode gems is (mostly) built-in now if statements do not introduce scope in Ruby. What's changed? Single character strings. Ruby 1.9 irb(main):001:0> ?c => "c" Ruby 1.8.6 irb(main):001:0> ?c => 99 String index. Ruby 1.9 irb(main):001:0> "ca...