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Simple way to transpose columns and rows in SQL?
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-- Author: Paco Zarate
-- Create date: 2015-11-10
-- Description: SQLTranspose dynamically changes a table to show rows as headers. It needs that all the values are numeric except for the field using for transposing.
-- Parameters: @TableName - Table to transpose
-- ...
How big can a user agent string get?
...ind the fastest hash algorithm that didn't produce any collisions. For my PHP environment I found md5 performed quickly at 2.3 seconds with no collisions. Interestingly I tried crc32 and crc32b and they also performed at 2.3 seconds with no collisions. But, because md5 has more combinations than c...
Efficient evaluation of a function at every cell of a NumPy array
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Notice the warning given in the vectorize function description: The vectorize function is provided primarily for convenience, not for performance. The implementation is essentially a for loop. So this will very likely not speed up the process at all.
– G...
PostgreSQL Connection URL
...er=host;Port=5432;User Id=username;Password=secret;Database=databasename;
PHP documentation us here, the general connection string is
host=hostname port=5432 dbname=databasename user=username password=secret
If you're using something else, you'll have to tell us.
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Breaking out of a nested loop
..... This syntax would be incompatible with the goto labels available in C#. PHP uses something else: break 3; Put the number of levels after the break statement.
– ygoe
Jun 27 '14 at 8:33
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What's the difference between a Future and a Promise?
...nd does not wait for all promises to be fulfilled. I have not found a good description of this fact...
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How can I create a link to a local file on a locally-run web page?
... (e.g. local dev server) to a local file. forums.mozillazine.org/viewtopic.php?f=9&t=1730
– nuala
Feb 20 '16 at 23:30
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Proper REST response for empty table?
...ave a redirection.
Why not 204 (No Content) ?
Here's an excerpt from the description of the 204 status code by w3c
The server has fulfilled the request but does not need to return an entity-body, and might want to return updated metainformation.
While this may seem reasonable in this case, I...
How to get the current date/time in Java [duplicate]
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I don't understand, in description you put dots and -, and in code only _ instead of -, and no separators for date/time..
– Line
Aug 2 '18 at 8:46
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What exception classes are in the standard C++ library
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See this site
Exception Description
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std::exception An exception and parent class of all the standard C++ exceptions.
std::bad_alloc This can be thrown by new.
std::bad_cast This can be ...