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How to get an outline view in sublime texteditor?
...TRL+R, or CMD+R for Mac, for the function list. This works in Sublime Text 1.3 or above.
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xcode-select active developer directory error
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1346
This problem happens when xcode-select developer directory was pointing to /Library/Developer...
How to prevent scrollbar from repositioning web page?
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invalid byte sequence for encoding “UTF8”
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112
If you need to store UTF8 data in your database, you need a database that accepts UTF8. You ca...
String replacement in java, similar to a velocity template
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143
Use StringSubstitutor from Apache Commons Text.
https://commons.apache.org/proper/commons-tex...
Postgresql aggregate array
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163
Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as mark...
How to add 10 days to current time in Rails
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Use
Time.now + 10.days
or even
10.days.from_now
Both definitely work. Are you sure you're in Rails and not just Ruby?
If you definitely are in Rails, where are you trying to run this from? Note that Active Support has to be loaded.
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How to check an Android device is HDPI screen or MDPI screen?
...rces().getDisplayMetrics().density;
// return 0.75 if it's LDPI
// return 1.0 if it's MDPI
// return 1.5 if it's HDPI
// return 2.0 if it's XHDPI
// return 3.0 if it's XXHDPI
// return 4.0 if it's XXXHDPI
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Comparing two collections for equality irrespective of the order of items in them
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