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How to set auto increment primary key in PostgreSQL?
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answered Oct 10 '11 at 21:10
A.H.A.H.
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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
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User.select(:first,:email).group(:first,:email).having("count(*) > 1")
Also, this is a little unrelated but handy. If you want to see how times each combination was found, put .size at the end:
User.select(:first,:email).group(:first,:email).having("count(*) > 1").size
and you'll get...
How can I convert JSON to a HashMap using Gson?
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16 Answers
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How do I pipe or redirect the output of curl -v?
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135
add the -s (silent) option to remove the progress meter, then redirect stderr to stdout to get...
How to call a stored procedure from Java and JPA
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18 Answers
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Get item in the list in Scala?
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311
Use parentheses:
data(2)
But you don't really want to do that with lists very often, since l...
How to display full (non-truncated) dataframe information in html when converting from pandas datafr
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Set the display.max_colwidth option to -1:
pd.set_option('display.max_colwidth', -1)
set_option...
Install dependencies globally and locally using package.json
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218
New Note: You probably don't want or need to do this. What you probably want to do is just put...
GroupBy pandas DataFrame and select most common value
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10 Answers
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How do I install an old version of Django on virtualenv?
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There was never a Django 1.0.7. The 1.0 series only went up to 1.0.4. You can see all the rele...