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When to use EntityManager.find() vs EntityManager.getReference() with JPA
...er, behind the scenes, will call
SELECT NAME, AGE FROM PERSON WHERE PERSON_ID = ?
UPDATE PERSON SET AGE = ? WHERE PERSON_ID = ?
If i call getReference method, JPA provider, behind the scenes, will call
UPDATE PERSON SET AGE = ? WHERE PERSON_ID = ?
And you know why ???
When you call getRefere...
HashSet versus Dictionary w.r.t searching time to find if an item exists
...so fast.
– FistOfFury
Sep 12 '12 at 19:15
4
Contrary to what the previous comments seem to imply,...
In android studio,cannot load 2 facets-unknown facet type:android and android-gradle
...ugins depend.)
– vishvAs vAsuki
Jan 19 '19 at 23:37
I believe it might have something to do with installing a cross-pl...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...:
# ll /sys/class/tty/*/device/driver
lrwxrwxrwx 1 root root 0 2012-03-28 19:07 /sys/class/tty/ttyS0/device/driver -> ../../../bus/pnp/drivers/serial/
lrwxrwxrwx 1 root root 0 2012-03-28 19:07 /sys/class/tty/ttyS1/device/driver -> ../../../bus/pnp/drivers/serial/
lrwxrwxrwx 1 root root 0 2012...
Spring get current ApplicationContext
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edited Jan 15 '19 at 18:42
Bruno Carletti
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answered Feb ...
MongoDb query condition on comparing 2 fields
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answered Dec 14 '10 at 19:43
IanIan
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TypeError: ObjectId('') is not JSON serializable
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answered Nov 19 '14 at 18:38
Garren SGarren S
4,14411 gold badge2121 silver badges4242 bronze badges
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How do I adb pull ALL files of a folder present in SD Card
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edited Oct 29 '19 at 7:25
answered Apr 8 '12 at 4:41
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How to make PDF file downloadable in HTML link?
...ad of linking to the .PDF file, instead do something like
<a href="pdf_server.php?file=pdffilename">Download my eBook</a>
which outputs a custom header, opens the PDF (binary safe) and prints the data to the user's browser, then they can choose to save the PDF despite their browser s...
What should I set JAVA_HOME environment variable on macOS X 10.6?
...command
An article for configuring the JDK in Spring Tool Suite (Eclipse
2019) on MacOS
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