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ipython: print complete history (not just current session)
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165
In ipython enter:
%history -g
It does not print time codes but it does print session/line n...
C# 'is' operator performance
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114
Using is can hurt performance if, once you check the type, you cast to that type. is actually...
How do I comment on the Windows command line?
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216
The command you're looking for is rem, short for "remark".
There is also a shorthand version ::...
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...
NUnit isn't running Visual Studio 2010 code
I'm trying to load a Visual Studio 2010 beta dll into the NUnit GUI. I get a popup error.
10 Answers
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What's the need of array with zero elements?
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139
This is a way to have variable sizes of data, without having to call malloc (kmalloc in this c...
RelativeLayout is taking fullscreen for wrap_content
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Jun 26 '11 at 20:15
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How to make a select with array contains value clause in psql
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128
Try
SELECT * FROM table WHERE arr @> ARRAY['s']::varchar[]
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Can I add comments to a pip requirements file?
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211
Sure, you can, just use #
pip docs:
A line that begins with # is treated as a comment and ...
How do I show a MySQL warning that just happened?
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answered Aug 1 '09 at 3:22
zombatzombat
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