大约有 10,900 项符合查询结果（耗时：0.0502秒） [XML]
If string is empty then return some default value
...blank?), and nil otherwise.
Example:
host = config[:host].presence || 'localhost'
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Mongoose's find method with $or condition does not work properly
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can you describe why this solution works with words? thanks
– Alexander Mills
Nov 22 '15 at 23:21
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Nodejs send file in response
Expressjs framework has a sendfile() method. How can I do that without using a whole framework. I am using node-native-zip to create an archive and I want to send that to the user.
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Is it possible in SASS to inherit from a class in another file?
...o check back for a while and then forgot); but I'm accepting your answer because it is the most complete—i.e., it walks me through the whole process. Thanks!
– Dan Tao
Mar 7 '13 at 22:02
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How do you list all triggers in a MySQL database?
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The command for listing all triggers is:
show triggers;
or you can access the INFORMATION_SCHEMA table directly by:
select trigger_schema, trigger_name, action_statement
from information_schema.triggers
You can do this from version 5.0.10 onwards.
More information about the TRIGGERS ...
Instantiating object of type parameter
...der> it = new MyClass<>(StringBuilder::new);
Alternatively, you can provide a Class<T> object, and then use reflection.
class MyClass<T> {
private final Constructor<? extends T> ctor;
private T field;
MyClass(Class<? extends T> impl) throws NoSuchMethodE...
Return two and more values from a method
...ormatting, not text formatting. Indent lines four spaces and the weirdness caused by irb's >> prompt will go away.
– Chris Lutz
Dec 25 '09 at 15:31
4
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How to use SQL Order By statement to sort results case insensitive?
I have a SQLite database that I am trying to sort by Alphabetical order. The problem is, SQLite doesn't seem to consider A=a during sorting, thus I get results like this:
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Weird “[]” after Java method signature
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It's a method that returns an int[].
Java Language Specification (8.4 Method Declarations)
For compatibility with older versions of the Java platform, a declaration form
for a method that returns an array is allowed to place (some or all of) the empty
bracket pairs that for...
Current executing procedure name
...OCID) GO EXEC utility.#TempProc GO ROLLBACK GO
– SAinCA
Aug 4 '16 at 22:14
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