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How do I use itertools.groupby()?

I haven't been able to find an understandable explanation of how to actually use Python's itertools.groupby() function. What I'm trying to do is this: ...
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Why is volatile not considered useful in multithreaded C or C++ programming?

...ntly posted, I seem to be confused about the utility (or lack thereof) of volatile in multi-threaded programming contexts. ...
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Select multiple records based on list of Id's with linq

I have a list containing Id's of my UserProfile table. How can i select all UserProfiles based on the list of Id's i got in a var using LINQ ? ...
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Trusting all certificates using HttpClient over HTTPS

Recently posted a question regarding the HttpClient over Https ( found here ). I've made some headway, but I've run into new issues. As with my last problem, I can't seem to find an example anywhere that works for me. Basically, I want my client to accept any certificate (because I'm only ever po...
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Can hash tables really be O(1)?

It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind: ...
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How to share my Docker-Image without using the Docker-Hub?

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Can I stretch text using CSS?

...appear bolder than smaller text beside it. I just want to stretch the text vertically so it's kind of deformed. This would be in one div, and then the normal text beside it would be in another div. How can I do this? ...
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What exactly does big Ө notation represent?

I'm really confused about the differences between big O, big Omega, and big Theta notation. 6 Answers ...
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What is the difference between Θ(n) and O(n)?

Sometimes I see Θ(n) with the strange Θ symbol with something in the middle of it, and sometimes just O(n). Is it just laziness of typing because nobody knows how to type this symbol, or does it mean something different? ...
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How to make a SIMPLE C++ Makefile

We are required to use a Makefile to pull everything together for our project, but our professor never showed us how to. 7 ...