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What is the meaning and difference between subject, user and principal?
...he subject and the application is the object. When someone knocks on your door the visitor is the subject requesting access and your home is the object access is requested of.
Principal - A subset of subject that is represented by an account, role or other unique identifier. When we get to the lev...
Is It Possible to Sandbox JavaScript Running In the Browser?
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Have a look at Douglas Crockford's ADsafe:
ADsafe makes it safe to put guest code (such as third party scripted advertising or widgets) on any web page. ADsafe defines a subset of JavaScript that is powerful enough to allow guest code t...
Repeat each row of data.frame the number of times specified in a column
...ting or reordering. I had another solution that is far less elegant and no doubt less efficient. I might post anyway so that others can compare.
– wkmor1
May 24 '10 at 10:30
24
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Storing sex (gender) in database
...ence to performance? I know it's almost micro-optimising which I shouldn't do, but it's food for my curious mind.
– Marko
Nov 14 '10 at 2:32
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Get the last non-empty cell in a column in Google Sheets
...ed about eloquence in this case as long as it works like a charm (which it does) - thanks a lot Sam!
– MichaelS
Nov 17 '11 at 9:46
4
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Are there console commands to look at whats in the queue and to clear the queue in Sidekiq?
... -1 }
# See all jobs in all queues
Sidekiq::Client.registered_queues.each do |q|
Sidekiq.redis { |r| r.lrange "queue:#{q}", 0, -1 }
end
# Remove a queue and all of its jobs
Sidekiq.redis do |r|
r.srem "queues", "app_queue"
r.del "queue:app_queue"
end
Unfortunately, removing a specific jo...
Difference between dispatch_async and dispatch_sync on serial queue?
...nly be executed after it is dispatched.
The execution time of the tasks doesn't change anything. This code always print 12
dispatch_async(_serialQueue, ^{ sleep(1000);printf("1"); });
dispatch_async(_serialQueue, ^{ printf("2"); });
What may happened is
Thread 1: dispatch_async a time consu...
Working with huge files in VIM
I tried opening a huge (~2GB) file in VIM but it choked. I don't actually need to edit the file, just jump around efficiently.
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ValueError: setting an array element with a sequence
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Thank you, but I do not think that is the answer. I have added the contents of the array when it throws the error above. And it seems to me that it is a box when I paste it into notepad and examine it line by line. Any other ideas?
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Add line break to 'git commit -m' from the command line
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Certainly, how it's done depends on your shell. In Bash, you can use single quotes around the message and can just leave the quote open, which will make Bash prompt for another line, until you close the quote. Like this:
git commit -m 'Message
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