大约有 43,000 项符合查询结果(耗时:0.0565秒) [XML]

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How to select only the records with the highest date in LINQ

...ount, you'd use this: var q = from n in table group n by n.AccountId into g select new {AccountId = g.Key, Date = g.Max(t=>t.Date)}; If you want the whole record: var q = from n in table group n by n.AccountId into g select g.OrderByDescending(t=>t.Date).Fir...
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Can I change the root EBS device of my amazon EC2 instance?

... Neither /dev/sda nor /dev/sda1 worked for me, but /dev/xvda did. – bhspencer Feb 5 '15 at 14:37 10 ...
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Why do I want to avoid non-default constructors in fragments?

... I think it's better to build your object in the fragment, and put only an id or something else into bundle. This is the code to create and attach a bundle: Bundle args = new Bundle(); args.putLong("key", value); yourFragment.setArguments(args); After that, in your fragment access data: Type val...
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Rails: Default sort order for a rails model?

...d be chained together but only resulting in 1 actual database query, to avoid performance problems from executing 7 separate queries. You can use a passed in parameter such as a date or a user_id (something that will change at run-time and so will need that 'lazy evaluation', with a lambda, like th...
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How can I add a table of contents to a Jupyter / JupyterLab notebook?

...n that constructs a table of contents for a notebook. It seems to only provide navigation, not section folding. share | improve this answer | follow | ...
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Emulating a do-while loop in Bash

... Never said anything different, only that true is not a built-in in Bash. It's a program usually found in /bin. – Fleshgrinder Feb 12 at 22:07 ...
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How do I get the entity that represents the current user in Symfony2?

...ct! You don't need to query it again. Find out the way to set up your providers in security.yml from Sf2 Documentation and try again. Best luck! share | improve this answer | ...
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Can I change the viewport meta tag in mobile safari on the fly?

...t.querySelector("meta[name=viewport]"); viewport.setAttribute('content', 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0'); Just change the parts you need and Mobile Safari will respect the new settings. Update: If you don't already have the meta viewport tag in the so...
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window.close and self.close do not close the window in Chrome

...ey/Tampermonkey script; Greasemonkey and Tampermonkey could reasonably provide this functionality in their API (essentially packaging the extension work for you). Consider making a feature request. The hacky workarounds: Chrome is currently was vulnerable to the "self redirection" exploit. So...
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'System.Net.Http.HttpContent' does not contain a definition for 'ReadAsAsync' and no extension metho

... How did you get that folder there? I used the web platform installer and it didn't make that folder in Program Files. – bladefist Jan 13 '14 at 19:02 ...