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What's the difference between HEAD^ and HEAD~ in Git?
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Rules of thumb
Use ~ most of the time — to go back a number of generations, usually what you want
Use ^ on merge commits — because they have two or more (immediate) parents
Mnemonics:
Tilde ~ is almost linear in appearance and wants to go backward in a s...
Does Python optimize tail recursion?
... return csum
... n, csum = n - 1, csum + n # Update parameters instead of tail recursion
>>> trisum(1000,0)
500500
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Counting inversions in an array
... i < j , find all inversion pairs such that A[i] > A[j] . I'm using merge sort and copying array A to array B and then comparing the two arrays, but I'm having a difficult time seeing how I can use this to find the number of inversions. Any hints or help would be greatly appreciated.
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How to echo with different colors in the Windows command line
...ng from Windows 10 the Windows console support ANSI Escape Sequences and some colors by default. The feature shipped with the Threshold 2 Update in Nov 2015.
MSDN Documentation
Update (05-2019): The ColorTool enables you to change the color scheme of the console. It's part of the Microsoft Termina...
How to get my IP address programmatically on iOS/macOS?
...ll IPv4 and IPv6 addresses on an iOS or OSX device. The first getIPAddress method acts more or less as the older code in this answer: you can prefer either one or the other type address, and it always prefers WIFI over cellular (obviously you could change this).
More interestingly it can return a d...
What is the difference between trie and radix trie data structures?
Are the trie and radix trie data structures the same thing?
3 Answers
3
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Does C# have extension properties?
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For the moment it is still not supported out of the box by Roslyn compiler ...
Until now, the extension properties were not seen as valuable enough to be included in the previous versions of C# standard. C# 7 and C# 8.0 have seen this...
What is the best (and safest) way to merge a Git branch into master?
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How I would do this
git checkout master
git pull origin master
git merge test
git push origin master
If I have a local branch from a remote one, I don't feel comfortable with merging other branches than this one with the remote. Also I would not push my changes, until I'm happy with what I...
What's the complete range for Chinese characters in Unicode?
...de "Chinese, Japanese, and Korean" characters)
The "East Asian Script" document does mention:
Blocks Containing Han Ideographs
Han ideographic characters are found in five main blocks of the Unicode Standard, as
shown in Table 12-2
Table 12-2. Blocks Containing Han Ideographs
Block ...
Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
...for subjective opinions, but that's not what I'm after. I'd love to hear some well-grounded arguments on this topic.
11 Ans...