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Random “Element is no longer attached to the DOM” StaleElementReferenceException
...ms like a complete nightmare. The Chrome webdriver is currently unusable, and the other drivers are quite unreliable, or so it seems. I am battling many problems, but here is one.
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Is there a combination of “LIKE” and “IN” in SQL?
...ecause Full Text Search (FTS) is the recommended alternative.
Both Oracle and SQL Server FTS implementations support the CONTAINS keyword, but the syntax is still slightly different:
Oracle:
WHERE CONTAINS(t.something, 'bla OR foo OR batz', 1) > 0
SQL Server:
WHERE CONTAINS(t.something, '"b...
How can I negate the return-value of a process?
...at negates the value a process returns. It should map 0 to some value != 0 and any value != 0 to 0, i.e. the following command should return "yes, nonexistingpath doesn't exist":
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Ruby on Rails Callback, what is difference between :before_save and :before_create?
Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what they have to do with Rails validations? Does validation occur after :before_save or :before_create ?
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What is an invariant?
... of a program state that is always true..." - @jacob baskin - well written and thanks for this.
– twknab
May 31 '19 at 23:37
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How to add 'ON DELETE CASCADE' in ALTER TABLE statement
...ON DELETE CASCADE to an already existing constraint. You will have to drop and re-create the constraint. The documentation shows that the MODIFY CONSTRAINT clause can only modify the state of a constraint (i-e: ENABLED/DISABLED...).
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How do I generate a random int number?
How do I generate a random integer in C#?
32 Answers
32
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What is the fundamental difference between WebSockets and pure TCP?
I've read about WebSockets and I wonder why browser couldn't simply open trivial TCP connection and communicate with server like any other desktop application. And why this communication is possible via websockets?
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Why does an image captured using camera intent gets rotated on some devices on Android?
I'm capturing an image and setting it to image view.
24 Answers
24
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Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
.... Since Micro instances have only 613MB of memory, MySQL crashed every now and then. After a long search about MySQL, Micro Instance and Memory Managment I found out there is no default SWAP space for Micro instance. So if you want to avoid the crash you may need to setup a swap space for your micro...