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How does Hadoop process records split across block boundaries?
...ataInputStream. There are 2 cases:
If there is a CompressionCodec defined, then this codec is responsible for handling boundaries. Probably not relevant to your question.
If there is no codec however, that's where things are interesting: if the start of your InputSplit is different than 0, then you ...
Prevent segue in prepareForSegue method?
...r
In your view controller. You do your validation there, and if it's OK then return YES; if it's not then return NO; and the prepareForSegue is not called.
Note that this method doesn't get called automatically when triggering segues programmatically. If you need to perform the check, then you h...
How to get the first five character of a String
...an the characters required.
If you want to get the result back in string then you can use:
Using String Constructor and LINQ's Take
string firstFivChar = new string(yourStringVariable.Take(5).ToArray());
The plus with the approach is not checking for length before hand.
The other way is t...
Git hangs while writing objects
...is issue, if you can't ignore the file in question or just have to push it then follow this answer.
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Sleep until a specific time/date
...mand like "sleep" which takes no interval but an end time and sleeps until then.
18 Answers
...
Git, rewrite previous commit usernames and emails
... filter-branch --env-filter \"if [[ \\\"\$\`echo \$VAR\`\\\" = '\$OLD' ]]; then export \$VAR='\$NEW'; fi\" \$@; }; f"
To change the author name:
git change-commits GIT_AUTHOR_NAME "old name" "new name"
or the email for only the last 10 commits:
git change-commits GIT_AUTHOR_EMAIL "old@email.com" "...
Want to find records with no associated records in Rails
...ase. I might do that by creating a friend_ids hstore or serialized column. Then you could say Person.where(friend_ids: nil)
– Unixmonkey
Dec 20 '16 at 16:02
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Git push error '[remote rejected] master -> master (branch is currently checked out)'
...mand in your remote repository folder:
git config --bool core.bare true
Then delete all the files except .git in that folder. And then you will be able to perform git push to the remote repository without any errors.
shar...
Algorithm for Determining Tic Tac Toe Game Over
...rld.wolfram.com/MagicSquare.html if any row, column, or diag adds up to 15 then a player has won.
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How do I reattach to a detached mosh session?
...d it worked.
Shocking.
Find your mosh-client's PID:
$ ps -ef | grep mosh
Then, install CRIU according to their instructions.
Then, checkpoint it like this:
$ mkdir checkpoint
$ sudo ./criu dump -D checkpoint -t PID --shell-job
Then, restore it:
$ sudo ./criu restore -D checkpoint --shell-job
A...