大约有 21,000 项符合查询结果(耗时:0.0328秒) [XML]

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Structs in Javascript

... = arguments[i]; } } return constructor; } var Item = makeStruct("id speaker country"); var row = new Item(1, 'john', 'au'); alert(row.speaker); // displays: john share | improve this answ...
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Foreign key constraint may cause cycles or multiple cascade paths?

...lter your design (or doing so would compromise things) then you should consider using triggers as a last resort. FWIW resolving cascade paths is a complex problem. Other SQL products will simply ignore the problem and allow you to create cycles, in which case it will be a race to see which will ove...
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findViewByID returns null

...days on something so trivial. I moved setContentView() above the findViewById() call and that did t he trick. thanks! – agentcurry Jan 26 '12 at 20:35 2 ...
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sqlalchemy unique across multiple columns

... that represents locations. Locations "belong" to customers. Locations are identified by a unicode 10 character code. The "location code" should be unique among the locations for a specific customer. ...
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How to open a second activity on click of button in android app

I am learning to build android applications and I need some specific help. I can't seem to get my head around which bits of template code I am required to change, and which bits are static. ...
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MongoDB and “joins” [duplicate]

...s to do it manually, as you have almost described. Just save a document's _id in another document's other_id, then write your own function to resolve the relationship. The other solution is to use DBRefs as described on the manual page above, which will make MongoDB resolve the relationship client-s...
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The object 'DF__*' is dependent on column '*' - Changing int to double

...se DB migrations of my framework (Laravel) and dropColumn there? I have no idea how to drop the constraint which has mysterious name, autogenerated by SQL server :( – JustAMartin Feb 15 '16 at 16:00 ...
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ASP.NET MVC - Set custom IIdentity or IPrincipal

...hing fairly simple: in my ASP.NET MVC application, I want to set a custom IIdentity / IPrincipal. Whichever is easier / more suitable. I want to extend the default so that I can call something like User.Identity.Id and User.Identity.Role . Nothing fancy, just some extra properties. ...
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What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]

... is the top left picture not simply SELECT * FROM TableB;? Why is the top middle picture not SELECT * FROM A INTERSECT SELECT * FROM B ? etc – onedaywhen Sep 9 '11 at 10:41 ...
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REST API Best practices: Where to put parameters? [closed]

...nted best practices, I have not found them yet. However, here are a few guidelines I use when determining where to put parameters in an url: Optional parameters tend to be easier to put in the query string. If you want to return a 404 error when the parameter value does not correspond to an exist...