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explicit casting from super class to subclass
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edited Jul 26 '19 at 11:22
answered Jun 23 '14 at 13:07
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How to avoid having class data shared among instances?
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The accepted answer works but a little more explanation does not hurt.
Class attributes do no...
Java: Check if enum contains a given string?
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edited Jan 22 '19 at 8:45
Michu93
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Best practices for SQL varchar column length [closed]
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See this link (posted by Erwin Brandstetter as a comment)
Edit 2013-09-22
Regarding bigown's comment:
In Postgres versions before 9.2 (which was not available when I wrote the initial answer) a change to the column definition did rewrite the whole table, see e.g. here. Since 9.2 this is no lo...
Postgres and Indexes on Foreign Keys and Primary Keys
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SergeyBSergeyB
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Storing WPF Image Resources
...200x200 pixels).
– O. R. Mapper
Aug 22 '14 at 22:40
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A generic error occurred in GDI+, JPEG Image to MemoryStream
... SavindraSavindra
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SQL SELECT speed int vs varchar
...SSD laptop:
Size on disk: A=261MB B=292MB C=322MB
Non-indexed by id: select count(*), select by id: 450ms same on all tables
Insert* one row per TX: B=9ms/record C=9ms/record
Bulk insert* in single TX: B=140usec/record C=180usec/record
Indexed by id, ...
Regex: ignore case sensitivity
...il.
– Gabriel Staples
Oct 17 '18 at 22:13
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Laravel requires the Mcrypt PHP extension
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