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Likelihood of collision using most significant bits of a UUID in Java
...which means you on average need to generate 2^30 UUIDs to get a collision (compared to 2^61 for the full UUID).
So I would say that you are rather safe. Note, however that this is absolutely not true for other types of UUIDs, as Carl Seleborg mentions.
Incidentally, you would be slightly better of...
Default html form focus without JavaScript
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Shorthand way for assigning a single field in a record, while copying the rest of the fields?
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Nice video by the way youtube.com/watch?v=YScIPA8RbVE
– Damián Rafael Lattenero
Nov 11 '19 at 23:23
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How do you delete an ActiveRecord object?
...llow you to delete records
without a primary key
Note: from @hammady's comment, user.destroy won't work if User model has no primary key.
Note 2: From @pavel-chuchuva's comment, destroy_all with conditions and delete_all with conditions has been deprecated in Rails 5.1 - see guides.rubyonrails....
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
I'm attempting to deploy my code to heroku with the following command line:
34 Answers
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Is there a Newline constant defined in Java like Environment.Newline in C#?
...f Java, use:
System.getProperty("line.separator");
See https://java.sun.com/docs/books/tutorial/essential/environment/sysprop.html for other properties.
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Why does Haskell's “do nothing” function, id, consume tons of memory?
... of the leftmost id is twice as large.
Note that types are deleted during compilation, so this will only take up memory in GHC. It won't take up memory in your program.
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Difference between a clickable ImageView and ImageButton
... significant difference between an ImageView that's set to be clickable, compared with an ImageButton ?
3 Answers
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How does '20 seconds' work in Scala?
How does the following compile:
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How do I remove the “extended attributes” on a file in Mac OS X?
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Use the xattr command. You can inspect the extended attributes:
$ xattr s.7z
com.apple.metadata:kMDItemWhereFroms
com.apple.quarantine
and use the -d option to delete one extended attribute:
$ xattr -d com.apple.quarantine s.7z
$ xattr...