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Is there a performance difference between CTE , Sub-Query, Temporary Table or Table Variable?
In this excellent SO question , differences between CTE and sub-queries were discussed.
4 Answers
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What is the performance cost of having a virtual method in a C++ class?
Having at least one virtual method in a C++ class (or any of its parent classes) means that the class will have a virtual table, and every instance will have a virtual pointer.
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Singleton: How should it be used
Edit:
From another question I provided an answer that has links to a lot of questions/answers about singletons: More info about singletons here:
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The definitive guide to form-based website authentication [closed]
We believe that Stack Overflow should not just be a resource for very specific technical questions, but also for general guidelines on how to solve variations on common problems. "Form based authentication for websites" should be a fine topic for such an experiment.
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How to get a subset of a javascript object's properties
Say I have an object:
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Python, compute list difference
In Python, what is the best way to compute the difference between two lists?
14 Answers
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How would Git handle a SHA-1 collision on a blob?
This probably never happened in the real-world yet, and may never happen, but let's consider this: say you have a git repository, make a commit, and get very very unlucky: one of the blobs ends up having the same SHA-1 as another that is already in your repository. Question is, how would Git handle ...
Difference between a User and a Login in SQL Server
I have recently been running into many different areas of SQL Server that I normally don't mess with. One of them that has me confused is the area of Logins and Users. Seems like it should be a pretty simple topic...
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Accessing inactive union member and undefined behavior?
I was under the impression that accessing a union member other than the last one set is UB, but I can't seem to find a solid reference (other than answers claiming it's UB but without any support from the standard).
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What is the difference between Cloud, Grid and Cluster? [closed]
What is the difference between Cloud, Cluster and Grid? Please give some examples of each as the definition of cloud is very broad. As answered in another question , can I call Dropbox, Gmail, Facebook, Youtube, Rapidshare etc. a Cloud?
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