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What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]
...erence in performance. Final version prepared by SQL Server would be the same in both the cases.
– Sateesh Pagolu
Feb 27 '15 at 0:31
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How to get number of entries in a Lua table?
Sounds like a "let me google it for you" question, but somehow I can't find an answer. The Lua # operator only counts entries with integer keys, and so does table.getn :
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How to handle back button in activity
How to handle a back button in an activity? I have some buttons. If I click one of the button it's redirecting to the buttons which I required. It's working fine but When I press back button it gets finished.
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NumPy array initialization (fill with identical values)
I need to create a NumPy array of length n , each element of which is v .
7 Answers
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How to change a nullable column to not nullable in a Rails migration?
...ere are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
8 Answers
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Load multiple packages at once
...oposed functions do work -- but only if you specify the character.only argument to be TRUE. Quick example:
lapply(x, require, character.only = TRUE)
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How did Google manage to do this? Slide ActionBar in Android application
I really want to implement this (the side navigation) in an app of my own, does anyone know how Google managed to do this?
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Implement Stack using Two Queues
... into queue2
dequeue and return the last item of queue1, then switch the names of queue1 and queue2
Version B (efficient pop):
push:
enqueue in queue2
enqueue all items of queue1 in queue2, then switch the names of queue1 and queue2
pop:
deqeue from queue1
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Filter by process/PID in Wireshark
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good point..thats what I thought too.. let me wait for a day before closing this, just incase there is a wireshark ninja out there who manages to do this..
– Ryan Fernandes
Aug 27 '09 at 8:41
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bash/fish command to print absolute path to a file
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Use realpath
$ realpath example.txt
/home/username/example.txt
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