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JPA EntityManager: Why use persist() over merge()?
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edited Jan 25 at 14:43
Lubo
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answered Jul 1 '09 at 18:28
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Fastest Way to Find Distance Between Two Lat/Long Points
...(lng,lat)
– user606669
May 24 at 22:43
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@user606669 It's POINT(lng,lat)
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How to link Docker services across hosts?
...direction?
– Raman
Nov 21 '14 at 18:43
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SQLite add Primary Key
I created a table in Sqlite by using the CREATE TABLE AS syntax to create a table based on a SELECT statement. Now this table has no primary key but I would like to add one.
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How to save username and password with Mercurial?
...ternative).
– Jasper
Aug 1 '18 at 9:43
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push_back vs emplace_back
I'm a bit confused regarding the difference between push_back and emplace_back .
7 Answers
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What is the meaning of the term “thread-safe”?
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Adam Millerchip
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answered Nov 4 '08 at 12:16
BlauohrBlauohr
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How to save all the variables in the current python session?
I want to save all the variables in my current python environment. It seems one option is to use the 'pickle' module. However, I don't want to do this for 2 reasons:
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Hidden Features of MySQL
I've been working with Microsoft SQL Server with many years now but have only just recently started to use MySQL with my web applications, and I'm hungry for knowledge.
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How to print the full traceback without halting the program?
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edited Jun 22 '15 at 14:43
Mr_and_Mrs_D
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