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How do I find duplicates across multiple columns?
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Duplicated id for pairs name and city:
select s.id, t.*
from [stuff] s
join (
select name, city, count(*) as qty
from [stuff]
group by name, city
having count(*) > 1
) t on s.name = t.name and s.city = t.city
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vim line numbers - how to have them on by default?
...f the .vimrc file is not in your home directory create one with
vim .vimrc and add the commands you want at open.
Here's a site that explains the vimrc and how to use it.
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How to log request and response body with Retrofit-Android?
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I used setLogLevel(LogLevel.FULL).setLog(new AndroidLog("YOUR_LOG_TAG")), it helped me.
UPDATE. You can also try for debug purpose use retrofit.client.Response as response model
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In javascript, is an empty string always false as a boolean?
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Yes. Javascript is a dialect of ECMAScript, and ECMAScript language specification clearly defines this behavior:
ToBoolean
The result is false if the argument is the empty String (its length is zero);
otherwise the result is true
Quote taken from http://www.ecma-inte...
How to completely uninstall Android Studio on Mac?
I recently downloaded Android Studio on my Macbook Pro and I messed up with it every time I open it. It gives me plugin errors and several other errors. I need to uninstall it completely from my mac. I tried to delete it from my mac and then install it again as if you would do the first time, but it...
Tomcat startup logs - SEVERE: Error filterStart how to get a stack trace?
...that type of info. I wouldn't expect the full stacktrace to be dumped to standard out.
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How can I style even and odd elements?
Is it possible to use CSS pseudo-classes to select even and odd instances of list items?
9 Answers
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GDB corrupted stack frame - How to debug?
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Those bogus adresses (0x00000002 and the like) are actually PC values, not SP values. Now, when you get this kind of SEGV, with a bogus (very small) PC address, 99% of the time it's due to calling through a bogus function pointer. Note that virtual calls i...
zsh compinit: insecure directories
What does it mean and how can I fix it?
22 Answers
22
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Convert to/from DateTime and Time in Ruby
How do you convert between a DateTime and a Time object in Ruby?
6 Answers
6
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