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PostgreSQL error 'Could not connect to server: No such file or directory'
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"Postgres.app" is a better fix if you are on OS X
Here is the fix:
Stop the database
cd /var
sudo rm -r pgsql_socket
sudo ln -s /tmp pgsql_socket
chown _postgres:_postgres pgsql_socket
Restart PostgreSQL (not your computer)
More information is available...
How does BLAS get such extreme performance?
...evel1 functions. However, you can boost the performance of this functions if you can provide a dedicated implementation that makes use of some multiprocessor architecture with shared memory.
Level 3 functions are operations like the matrix-matrix product. Again you could implement them in terms o...
how to add script src inside a View when using Layout
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Depending how you want to implement it (if there was a specific location you wanted the scripts) you could implement a @section within your _Layout which would enable you to add additional scripts from the view itself, while still retaining structure. e.g.
_Layout...
Multi-Line Comments in Ruby?
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I've found that if I include a tab before =begin or =end, the comments don't work. The =begin and =end each need to be written at the beginning of each line.
– Rose Perrone
Jun 22 '12 at 20:51
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Unique constraint on multiple columns
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By using the constraint definition on table creation, you can specify one or multiple constraints that span multiple columns. The syntax, simplified from technet's documentation, is in the form of:
CONSTRAINT constraint_name UNIQUE [ CLUSTERED | NONCLUSTERED ]
(
column [ ASC | DESC ] ...
UIView Infinite 360 degree rotation animation?
...de for iOS 3.0 and below but for newer programmers and new projects, Apple now warns users away from these methods in the Docs & @Nate code uses the block based animations that Apple now prefers
– PaulWoodIII
May 15 '13 at 4:46
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What does send() do in Ruby?
...s, so that you can call private methods, too (useful for unit testing).
If there is really no variable before send, that means that the global Object is used:
send :to_s # "main"
send :class # Object
share
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HTML5: Slider with two inputs possible?
... 1.2, so I'm confused about your 4.0). If you figure it out, I'd love to know.
– Gary
Sep 7 '15 at 16:18
1
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jQuery checkbox change and click event
...ter does not work in all cases and I believe that jQuery recommend .prop() now.
– kabadisha
Jun 5 '16 at 16:28
2
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How to make an empty div take space
...floated, and certainly in my own case that worked. If that is always true (now, in 2016) then this answer is wrong. You can just add min-height: 1px; to the width: 140px; without the need to either to remove the float or add content.
– Nick Rice
Aug 8 '16 at 12...