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What does 'synchronized' mean?
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@peterh synchronized does more than that, hence the more verbose explanation
– Stu Thompson
Apr 12 '16 at 15:53
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Does java.util.List.isEmpty() check if the list itself is null? [duplicate]
Does java.util.List.isEmpty() check if the list itself is null , or do I have to do this check myself?
8 Answers
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In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...st. The explanation that yield from g is equivalent to for v in g: yield v does not even begin to do justice to what yield from is all about. Because, let's face it, if all yield from does is expand the for loop, then it does not warrant adding yield from to the language and preclude a whole bunch o...
JPA eager fetch does not join
What exactly does JPA's fetch strategy control? I can't detect any difference between eager and lazy. In both cases JPA/Hibernate does not automatically join many-to-one relationships.
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How do I check in SQLite whether a table exists?
...ables with the name specified; that is, the cursor will have a count of 0 (does not exist) or a count of 1 (does exist)
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PHP check whether property exists in object or class
I understand PHP does not have a pure object variable, but I want to check whether a property is in the given object or class.
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What does “&” at the end of a linux command mean?
...e shell
executes the command in the background in a subshell. The shell does
not wait for the command to finish, and
the return status is 0.
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How does Task become an int?
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Does an implicit conversion occur between Task<> and int?
Nope. This is just part of how async/await works.
Any method declared as async has to have a return type of:
void (avoid if possible)
Task (no result beyond...
Does Typescript support the ?. operator? (And, what's it called?)
Does Typescript currently (or are there plans to) support the safe navigation operator of ?.
14 Answers
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Why does Python use 'magic methods'?
...is respect and has historical roots.
Here's a quote from the FAQ:
Why does Python use methods for some
functionality (e.g. list.index()) but
functions for other (e.g. len(list))?
The major reason is history. Functions
were used for those operations that
were generic for a group of ...