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Why does changing 0.1f to 0 slow down performance by 10x?
... than on normalized floating-point. This is because many processors can't handle them directly and must trap and resolve them using microcode.
If you print out the numbers after 10,000 iterations, you will see that they have converged to different values depending on whether 0 or 0.1 is used.
Here...
How to compare software version number using js? (only number)
... would be to use Array.split to get arrays of parts from the input strings and then compare pairs of parts from the two arrays; if the parts are not equal we know which version is smaller.
There are a few of important details to keep in mind:
How should the parts in each pair be compared? The que...
How do I capture the output into a variable from an external process in PowerShell?
I'd like to run an external process and capture it's command output to a variable in PowerShell. I'm currently using this:
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Filter Java Stream to 1 and only 1 element
...lements in a LinkedList . I want to guarantee, however, that there is one and only one match to the filter criteria.
20 An...
Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
I was going through the exercises in Ruby Koans and I was struck by the following Ruby quirk that I found really unexplainable:
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git merge: apply changes to code that moved to a different file
... git did not notice that the code in the new file was the same as the old, and so none of my changes are there.
3 Answers...
In the shell, what does “ 2>&1 ” mean?
In a Unix shell, if I want to combine stderr and stdout into the stdout stream for further manipulation, I can append the following on the end of my command:
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How to implement a queue using two stacks?
Suppose we have two stacks and no other temporary variable.
20 Answers
20
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Generate all permutations of a list without adjacent equal elements
... return output
Proof of correctness
For two item types, with counts k1 and k2, the optimal solution has k2 - k1 - 1 defects if k1 < k2, 0 defects if k1 = k2, and k1 - k2 - 1 defects if k1 > k2. The = case is obvious. The others are symmetric; each instance of the minority element prevents ...
How can building a heap be O(n) time complexity?
...?
Often, answers to these questions focus on the difference between siftUp and siftDown. Making the correct choice between siftUp and siftDown is critical to get O(n) performance for buildHeap, but does nothing to help one understand the difference between buildHeap and heapSort in general. Indeed, ...