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Postgresql aggregate array
...nt name on GROUP BY.
CREATE TABLE grade
(Student_id int, Mark varchar(2));
INSERT INTO grade
(Student_id, Mark)
VALUES
(1, 'A'),
(2, 'B'),
(2, 'B+'),
(3, 'C'),
(3, 'A');
CREATE TABLE student
(Id int primary key, Name varchar(5));
INSERT INTO student
(Id, Name...
How do I get the entity that represents the current user in Symfony2?
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210
Symfony 4+, 2019+ Approach
In symfony 4 (probably 3.3 also, but only real-tested in 4) you ca...
I just discovered why all ASP.Net websites are slow, and I am trying to work out what to do about it
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202
If your page does not modify any session variables, you can opt out of most of this lock.
<...
How to convert Set to Array?
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edited Jan 31 '19 at 22:53
Steve Bennett
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Python - 'ascii' codec can't decode byte
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answered Mar 10 '12 at 5:34
Winston EwertWinston Ewert
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How Do I Use Factory Girl To Generate A Paperclip Attachment?
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answered Apr 2 '12 at 21:06
DanSDanS
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How to detect first time app launch on an iPhone
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edited Jun 27 '15 at 16:51
Sameera R.
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Renaming or copying files and folder using NERDTree on Vim. Is it possible?
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2 Answers
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Find first element in a sequence that matches a predicate
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260
To find first element in a sequence seq that matches a predicate:
next(x for x in seq if pred...
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
I have taken Problem #12 from Project Euler as a programming exercise and to compare my (surely not optimal) implementations in C, Python, Erlang and Haskell. In order to get some higher execution times, I search for the first triangle number with more than 1000 divisors instead of 500 as stated...