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What is hashCode used for? Is it unique?
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The quote from the MSDN is now out-of-date. The MSDN is now not as explicit about the hash code not being unique.
– user34660
Dec 26 '17 at 22:11
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How do I set up DNS for an apex domain (no www) pointing to a Heroku app?
...h custom solutions that allow CNAME-like behavior on the zone apex. To my knowledge, we have DNSimple's ALIAS record and DNS Made Easy's ANAME record; both behave similarly.
Using those, you could setup your records as (using zonefile notation, even tho you'll probably do this on their web user int...
How to find the kth smallest element in the union of two sorted arrays?
...uch i and j so that a[i-1] < b[j-1] < a[i] (or the other way round). Now since there are i elements in 'a' smaller than b[j-1], and j-1 elements in 'b' smaller than b[j-1], b[j-1] is the i + j-1 + 1 = kth smallest element. To find such i,j the algorithm does a dichotomic search on the arrays. ...
INNER JOIN vs LEFT JOIN performance in SQL Server
... LEFT JOIN because the performance of LEFT JOIN is better, despite what I know. After I changed it, the speed of query got significantly improved.
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Rebasing and what does one mean by rebasing pushed commits
...stream repo, and other developer's local repos may have pointers to that. Now their pointers are stale: the git client has no alternative but to use older pointers and rely upon the human to sort the rest out. This is a re-merge, and it can be VERY messy with a lot of confusing changes that must b...
Exposing a port on a live Docker container
... to create a Docker container that acts like a full-on virtual machine. I know I can use the EXPOSE instruction inside a Dockerfile to expose a port, and I can use the -p flag with docker run to assign ports, but once a container is actually running, is there a command to open/map additional por...
Android Camera Preview Stretched
...and the set the measured dimension accordingly.
And the next thing you know, you end up with this :D
This also works well with he front camera. I believe this is the best way to go about this. Now the only thing left for my app is to save the preview itself upon clicking on "Capture." But ya, ...
What is the proper REST response code for a valid request but an empty data?
... this unless you're writing your own server from scratch. Edit: Newer RFCs now allow for 400 to be used for semantically invalid requests.
Wikipedia's description of the HTTP status codes are particularly helpful.
You can also see the definitions in the HTTP/1.1 RFC2616 document at www.w3.org
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Eclipse, where to change the current debug line background?
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Ok, now I found it myself (through major reverse engineering). It is in General\Editors\Text Editors\Annotations page. It's called "Debug Current Instruction Pointer"
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Invalid syntax when using “print”? [duplicate]
... have replaced the print statement with the print function.
The syntax is now more or less the same as before, but it requires parens:
From the "what's new in python 3" docs:
Old: print "The answer is", 2*2
New: print("The answer is", 2*2)
Old: print x, # Trailing comma suppresses newl...