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How to find and return a duplicate value in array
...utions: https://gist.github.com/naveed-ahmad/8f0b926ffccf5fbd206a1cc58ce9743e
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Optimal way to concatenate/aggregate strings
....SourceTable (ID, Name)
VALUES
(1, 'Matt'),
(1, 'Rocks'),
(2, 'Stylus'),
(3, 'Foo'),
(3, 'Bar'),
(3, 'Baz')
The query result:
ID FullName
----------- ------------------------------
2 Stylus
3 Bar, Baz, Foo
1 Matt, Rocks
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How can I convert ereg expressions to preg in PHP?
Since POSIX regular expressions (ereg) are deprecated since PHP 5.3.0, I'd like to know an easy way to convert the old expressions to PCRE (Perl Compatible Regular Expressions) (preg) .
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Is “double hashing” a password less secure than just hashing it once?
...e an ordered list of the most likely passwords. They start with "password123" and progress to less frequently used passwords.
Let's say an attackers list is long, with 10 billion candidates; suppose also that a desktop system can compute 1 million hashes per second. The attacker can test her whole...
How to use an existing database with an Android application [duplicate]
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NOTE:
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Loader lock error
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ghibozghiboz
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How to get git diff with full context?
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edited Nov 22 '16 at 17:36
answered Nov 18 '16 at 18:11
E...
Extracting the last n characters from a string in R
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edited Nov 1 '11 at 12:30
answered Nov 1 '11 at 8:19
And...
First-time database design: am I overengineering? [closed]
... others on this question thus far pretty much cover it. Good job!
2 & 3) The performance hit you will take will largely be dependent on having and optimizing the right indexes for your particular queries / procedures and more importantly the volume of records. Unless you are talking about well...