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Rails find record with zero has_many records associated [duplicate]
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Bah, found it here: https://stackoverflow.com/a/5570221/417872
City.includes(:photos).where(photos: { city_id: nil })
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Grouped LIMIT in PostgreSQL: show the first N rows for each group?
... edited Aug 11 '16 at 9:08
ngspkinga
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answered May 19 '11 at 19:55
DaveDa...
What is the correct way to get a subarray in Scala?
I am trying to get a subarray in scala, and I am a little confused on what the proper way of doing it is. What I would like the most would be something like how you can do it in python:
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Breaking loop when “warnings()” appear in R
I am having an issue:
I am running a loop to process multiple files. My matrices are enormous and therefore I often run out of memory if I am not careful.
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How to change the map center in Leaflet.js
The following code initializes a leaflet map. The initialize function centers the map based on user location. How do I change the center of the map to a new position after calling the initialize function?
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Count work days between two dates
How can I calculate the number of work days between two dates in SQL Server?
23 Answers
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How to monitor the memory usage of Node.js?
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node-memwatch : detect and find memory leaks in Node.JS code.
Check this tutorial Tracking Down Memory Leaks in Node.js
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How to best position Swing GUIs?
In another thread I stated that I liked to center my GUIs by doing something like this:
2 Answers
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Keep CMD open after BAT file executes
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Depending on how you are running the command, you can put /k after cmd to keep the window open.
cmd /k my_script.bat
Simply adding cmd /k to the end of your batch file will work too. Credit to Luigi D'Amico who posted about this i...
What is the difference between Swing and AWT?
Can someone please explain me what's the difference between Swing and AWT?
8 Answers
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