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Find a pair of elements from an array whose sum equals a given number
Given array of n integers and given a number X, find all the unique pairs of elements (a,b), whose summation is equal to X.
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How to remove unused imports from Eclipse
Is there any way to automatically remove all unused imports (signaled with a warning) of a project with Eclipse IDE?
10 Ans...
What is the difference between a HashMap and a TreeMap? [duplicate]
I started learning Java. When would I use a HashMap over a TreeMap?
8 Answers
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Performance surprise with “as” and nullable types
I'm just revising chapter 4 of C# in Depth which deals with nullable types, and I'm adding a section about using the "as" operator, which allows you to write:
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Returning an array using C
I am relatively new to C and I need some help with methods dealing with arrays. Coming from Java programming, I am used to being able to say int [] method() in order to return an array. However, I have found out that with C you have to use pointers for arrays when you return them. Being a new progr...
Remove unused imports in Android Studio
I recently started Android Studio IDE to make my android apps. I find shortkey to remove unused import in Android Studio is not working ( Ctrl + Shift + O )
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Are 2^n and n*2^n in the same time complexity?
Resources I've found on time complexity are unclear about when it is okay to ignore terms in a time complexity equation, specifically with non-polynomial examples.
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How do I add an icon to a mingw-gcc compiled executable?
In Windows, using mingw's gcc, is there anyway to specify that the output exe file is to take an icon file, so that the exe file shows with that icon in explorer?
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How to append output to the end of a text file
How do I append the output of a command to the end of a text file?
10 Answers
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Disable assertions in Python
How do I disable assertions in Python?
6 Answers
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