大约有 19,594 项符合查询结果（耗时：0.0199秒） [XML]
Visually managing MongoDB documents and collections [closed]
...nch of test documents. While I don't have too much trouble using the JSON-based command-line tools, it gets extremely tedious to have to keep searching for documents, copy-and-pasting OIDs, etc., especially from a command prompt window (ever tried to "mark" text that wraps multiple lines?)
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Do you use source control for your database items? [closed]
...hole because we don't have a solid process in place for versioning our database schema changes. We do a lot of backups so we're more or less covered, but it's bad practice to rely on your last line of defense in this way.
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Download a file by jQuery.Ajax
...catch(() => alert('oh no!'));
2012 Original jQuery/iframe/Cookie based approach
Bluish is completely right about this, you can't do it through Ajax because JavaScript cannot save files directly to a user's computer (out of security concerns). Unfortunately pointing the main window's URL a...
Where do I put image files, css, js, etc. in Codeigniter?
...de the view folder? However the controller always reroutes the path to the base url so I have to specify the path in the .html file to where it sits, which is redundant.
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What is the difference between Views and Materialized Views in Oracle?
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Materialized views are disk based and are updated periodically based upon the query definition.
Views are virtual only and run the query definition each time they are accessed.
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store and retrieve a class object in shared preference
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Serialise it and store it, in a database (SQLite) / in a flat file.
– Blundell
Mar 24 '11 at 11:35
5
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Call one constructor from another
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@RosdiKasim: The base class constructor always runs first. You cannot use or see this until its base class has been initialized.
– SLaks
Dec 18 '13 at 16:59
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Getting the name of a child class in the parent class (static context)
...e there are potential problems in it's current implementation (src).
class Base {
public static function whoAmI() {
return get_called_class();
}
}
class User extends Base {}
print Base::whoAmI(); // prints "Base"
print User::whoAmI(); // prints "User"
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How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
...Other designs are less fragile, so I personally am afraid to recommend GCM based upon the amount of poor encryption code that I have seen in practice.
If you need both, message integrity and encryption, you can combine two algorithms: usually we see CBC with HMAC, but no reason to tie yourself to C...
Why can't decimal numbers be represented exactly in binary?
...oating point can be exactly represented.
Let's look at it another way - in base 10 which you're likely to be comfortable with, you can't express 1/3 exactly. It's 0.3333333... (recurring). The reason you can't represent 0.1 as a binary floating point number is for exactly the same reason. You can re...