大约有 9,000 项符合查询结果(耗时:0.0197秒) [XML]

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In which situations do we need to write the __autoreleasing ownership qualifier under ARC?

I'm trying to complete the puzzle. 3 Answers 3 ...
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Naming returned columns in Pandas aggregate function? [duplicate]

I'm having trouble with Pandas' groupby functionality. I've read the documentation , but I can't see to figure out how to apply aggregate functions to multiple columns and have custom names for those columns. ...
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Duplicate ID, tag null, or parent id with another fragment for com.google.android.gms.maps.MapFragme

I have an application with three tabs. 23 Answers 23 ...
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What are free monads?

...ome time, but everyone just seems to use/discuss them without giving an explanation of what they are. So: what are free monads? (I'd say I'm familiar with monads and the Haskell basics, but have only a very rough knowledge of category theory.) ...
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The SQL OVER() clause - when and why is it useful?

I read about that clause and I don't understand why I need it. What does the function Over do? What does Partitioning By do? Why can't I make a query with writing Group By SalesOrderID ? ...
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Why 0 is true but false is 1 in the shell?

The above will output 1 , which is contradictory with all other programming languages I know. 10 Answers ...
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Where can I learn how to write C code to speed up slow R functions? [closed]

What's the best resource for learning how to write C code for use with R? I know about the system and foreign language interfaces section of R extensions, but I find it pretty hard going. What are good resources (both online and offline) for writing C code for use with R? ...
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How to include (source) R script in other scripts

I've created a utility R script, util.R, which I want to use from other scripts in my project. What is the proper way to ensure that the function this script defines are available to function in my other scripts? ...
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Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”

Hi I was writing a program that imports private keys from a .pem file and create a private key object to use it later.. the problem I have faced is that some pem files header begin with ...
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Can I use my existing git repo with openshift?

Is it necessary to have git repo on openshift only? I already have bitbucket / github git repo and would prefer to push there only. Can I simply hook into it so that openshift gets intimation ? ...