大约有 30,000 项符合查询结果(耗时:0.0434秒) [XML]

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What is the point of Lookup?

...mple means that you have to regenerate the Lookup from the Dictionary each time the latter changes. But for some data it could be the right solution.] share | improve this answer | ...
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How do I create test and train samples from one dataframe with pandas?

... @RishabhAgrahari randomly shuffles different data split every time according to the frac arg. If you want to control the randomness you can state your own seed, like in the example. – MikeL Nov 15 '17 at 9:32 ...
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What is attr_accessor in Ruby?

I am having a hard time understanding attr_accessor in Ruby . Can someone explain this to me? 19 Answers ...
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How do you maintain development code and production code? [closed]

...ctices: master is the branch ready to be deployed into production at any time: the next release, with a selected set of feature branches merged in master. dev (or integration branch, or 'next') is the one where the feature branch selected for the next release are tested together maintenance (or ho...
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How to make “if not true condition”?

... true. if evaluation in shells are designed to be very flexible, and many times doesn't require chains of commands (as you have written). Also, looking at your code as is, your use of the $( ... ) form of cmd-substitution is to be commended, but think about what is coming out of the process. Try ...
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Creating a Radial Menu in CSS

... Almost 3 years later, I finally made the time to revisit this and post an improved version. You can still view the original answer at the end for reference. While SVG may be the better choice, especially today, my goal with this was to keep it just HTML and CSS, no...
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What's the difference between session.persist() and session.save() in Hibernate?

... persistent instance immediately, the assignment might happen at flush time. The spec doesn't say that, which is the problem I have with persist(). persist() also guarantees that it will not execute an INSERT statement if it is called outside of transaction boundaries. This is usef...
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How to check which locks are held on a table

...ReqOwnerType ,TAT.[name] AS TransName ,TAT.transaction_begin_time AS TransBegin ,DATEDIFF(ss, TAT.transaction_begin_time, GETDATE()) AS TransDura ,ES.session_id AS S_Id ,ES.login_name AS LoginName ,COALESCE(OBJ.name, PAROBJ.name) AS ObjectName ,PARIDX...
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Defining a variable with or without export

...execd execd process: export Note that we don't see the parent: line this time, because we have replaced the parent shell with the exec command, so there's nothing left to execute that command. share | ...
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Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?

...iPad1 support, which many of us aren't willing to concede at this point in time. share | improve this answer | follow | ...