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How do I create a list of random numbers without duplicates?
I tried using random.randint(0, 100) , but some numbers were the same. Is there a method/module to create a list unique random numbers?
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Oracle “Partition By” Keyword
Can someone please explain what the partition by keyword does and give a simple example of it in action, as well as why one would want to use it? I have a SQL query written by someone else and I'm trying to figure out what it does.
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How do I copy an entire directory of files into an existing directory using Python?
...ctory that contains a directory named bar (containing one or more files) and a directory named baz (also containing one or more files). Make sure there is not a directory named foo .
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How to define a custom ORDER BY order in mySQL
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MySQL has a handy function called FIELD() which is excellent for tasks like this.
ORDER BY FIELD(Language,'ENU','JPN','DAN'), ID
Note however, that
It makes your SQL less portable, as other DBMSs might not have such function
When your...
Where is the 'tests output pane'?
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Go to the view tab at the top of your screen, and select output.
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How is CountDownLatch used in Java Multithreading?
Can someone help me to understand what Java CountDownLatch is and when to use it?
12 Answers
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Update git commit author date when amending
...--date parameter to git commit. So, if you want to amend the last commit, and update its author date to the current date and time, you can do:
git commit --amend --date="$(date -R)"
(The -R parameter to date tells it to output the date in RFC 2822 format. This is one of the date formats underst...
Numpy array dimensions
I'm currently trying to learn Numpy and Python. Given the following array:
8 Answers
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Adding dictionaries together, Python [duplicate]
I have two dictionaries and I'd like to be able to make them one:
6 Answers
6
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What is the proper way to re-attach detached objects in Hibernate?
...ale detached entity in JPA.
merge() will push the stale state to the DB,
and overwrite any intervening updates.
refresh() cannot be called on a detached entity.
lock() cannot be called on a detached entity,
and even if it could, and it did reattach the entity,
calling 'lock' with argument 'LockM...