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Fastest way to iterate over all the chars in a String

In Java, what would the fastest way to iterate over all the chars in a String, this: 8 Answers ...
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Is there a performance difference between i++ and ++i in C?

Is there a performance difference between i++ and ++i if the resulting value is not used? 14 Answers ...
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Dictionary vs Object - which is more efficient and why?

What is more efficient in Python in terms of memory usage and CPU consumption - Dictionary or Object? 8 Answers ...
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Finding duplicates in O(n) time and O(1) space

Input: Given an array of n elements which contains elements from 0 to n-1, with any of these numbers appearing any number of times. ...
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How do I put two increment statements in a C++ 'for' loop?

I would like to increment two variables in a for -loop condition instead of one. 8 Answers ...
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Difference between pre-increment and post-increment in a loop?

Is there a difference in ++i and i++ in a for loop? Is it simply a syntax thing? 22 Answers ...
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HTML for the Pause symbol in audio and video control

I'm trying to find the Unicode symbol to make a button display the Unicode pause symbol. I was able to find that the Unicode play symbol is &#9658 but I'm looking for the equivalent of the Unicode pause symbol. ...
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Post-increment and pre-increment within a 'for' loop produce same output [duplicate]

The following for loops produce identical results even though one uses post increment and the other pre-increment. 12 Answe...
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PHP best way to MD5 multi-dimensional array?

What is the best way to generate an MD5 (or any other hash) of a multi-dimensional array? 13 Answers ...
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Should one use < or

If you had to iterate through a loop 7 times, would you use: 39 Answers 39 ...