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PostgreSQL LIKE query performance variations
...k), it just won't buy you better performance. Typically no big loss, since 1- or 2-letter strings are hardly selective (more than a few percent of the underlying table matches) and index support would not improve performance to begin with, because a full table scan is faster.
text_pattern_ops for...
Is GridFS fast and reliable enough for production?
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I use gridfs at work on one of our servers which is part of a price-comparing website with hon...
Android: Test Push Notification online (Google Cloud Messaging) [closed]
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167
Found a very easy way to do this.
Open http://phpfiddle.org/
Paste following php script in b...
Qt c++ aggregate 'std::stringstream ss' has incomplete type and cannot be defined
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155
You probably have a forward declaration of the class, but haven't included the header:
#inclu...
How to make vi redraw screen?
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218
I've been using ctrl+L for such purposes for 35 years now, what's wrong with it?
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How can I add remote repositories in Mercurial?
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130
You add entries to the [paths] section of your local clone's .hg/hgrc file. Here's an example...
Ruby/Rails: converting a Date to a UNIX timestamp
How would I get a UNIX timestamp (number of seconds since 1970 GMT) from a Date object in a Rails app?
5 Answers
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Selecting multiple columns in a pandas dataframe
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18 Answers
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importing pyspark in python shell
... I have the same issue. (See http://geekple.com/blogs/feeds/Xgzu7/posts/351703064084736)
19 Answers
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Matplotlib: draw grid lines behind other graph elements
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According to this - http://matplotlib.1069221.n5.nabble.com/axis-elements-and-zorder-td5346.ht...