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What's the fastest way to do a bulk insert into Postgres?
...est populate a database initially, and they suggest using the COPY command for bulk loading rows. The guide has some other good tips on how to speed up the process, like removing indexes and foreign keys before loading the data (and adding them back afterwards).
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Android: Rotate image in imageview by an angle
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For completeness here is the line based on the ImageView's values: matrix.postRotate( 180f, imageView.getDrawable().getBounds().width()/2, imageView.getDrawable().getBounds().height()/2);
– Stefan Hoth
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Make multiple-select to adjust its height to fit options without scroll bar
...et resize the size attribute when you populated the box. I see now, thanks for clarifying.
– Gravitate
Sep 26 '12 at 16:44
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Convert JSON to Map
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I hope you were joking about writing your own parser. :-)
For such a simple mapping, most tools from http://json.org (section java) would work.
For one of them (Jackson https://github.com/FasterXML/jackson-databind/#5-minute-tutorial-streaming-parser-generator), you'd do:
Map<Str...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...at a given ActiveRecord Query will generate. I recognize I can get this information from the log after the query has been issued, but I'm wondering if there is a method that can be called on and ActiveRecord Query.
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Should MySQL have its timezone set to UTC?
...tter what timezone is on the server as long as you have the time set right for the current timezone, know the timezone of the datetime columns that you store, and are aware of the issues with daylight savings time.
On the other hand if you have control of the timezones of the servers you work with ...
Add margin above top ListView item (and below last) in Android
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android:clipToPadding is an XML attribute of ViewGroup, the base class for layouts and views containers.
The related method call is:
public void setClipToPadding (boolean clipToPadding)
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How to trigger Autofill in Google Chrome?
...there is some kind of special markup to enable the Chrome autofill feature for a specific form. I only found questions about how to disable it, but I would like to know if I can add some kind of markup to the html code in order to tell the browser "this is the input for the address" or "this is the ...
In pure functional languages, is there an algorithm to get the inverse function?
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In some cases, yes! There's a beautiful paper called Bidirectionalization for Free! which discusses a few cases -- when your function is sufficiently polymorphic -- where it is possible, completely automatically to derive an inverse function. (It also discusses what makes the problem hard when the ...
In SQL, how can you “group by” in ranges?
...n as well (like group counts). say i wana aggregate the scholarship column for each score range. I tried, but not getting it right
– Munish Goyal
May 10 '11 at 7:05
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