大约有 10,000 项符合查询结果(耗时:0.0212秒) [XML]

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Applying function with multiple arguments to create a new pandas column

...d yield, as opposed to return, because we are talking about iterators (so, transform the zip result into a list: list(zip(['a','b'],['c','d'],['e','f']))) – toto_tico 2 days ago ...
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If table exists drop table then create it, if it does not exist just create it

... with views using the same approach, in this case CREATE/DROP TABLE merely transforms to CREATE/DROP VIEW while RENAME TABLE remains unchanged. In fact you can even turn table into view and vice versa. CREATE VIEW `foo__new` as ...; /* if not ok: terminate, report error */ RENAME TABLE `foo__new` t...
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What is the point of the diamond operator () in Java 7?

...] warning: List<String> list = new LinkedList(); So, the question transforms: why [unchecked] warning is not suppressed automatically only for the case when new collection is created? I think, it would be much more difficult task then adding <> feature. UPD: I also think that there...
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Convert data.frame column format from character to factor

... I've doing it with a function. In this case I will only transform character variables to factor: for (i in 1:ncol(data)){ if(is.character(data[,i])){ data[,i]=factor(data[,i]) } } share ...
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财务计算器拓展:复利计算、平均值、中位数、众数、方差计算 - App Invento...

Financial Calculator Extension 精心打造“财务计算器”扩展,为您Android应用程序增添先进财务和统计功能。此扩展让您能够执行广泛财务计算,从简单利息和复利到净现值和投资回报率。它还使您能够进行基本统计计算...
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How do I delete a fixed number of rows with sorting in PostgreSQL?

... sounds like a bug in the query optimiser - it should be able to spot that transformation and do the same thing with the data itself. – rjmunro Oct 9 '15 at 11:10 1 ...
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Why the switch statement cannot be applied on strings?

...s in C++? I need to initialize private static objects It was necessary to transform the lambda context capture [&] into an argument, or that would have been undefined: const static auto lambda used with capture by reference Example that produces the same output as above: #include <function...
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What does “Content-type: application/json; charset=utf-8” really mean?

... @DanielLuna is right, application/json has to be in one of the ucs transformation formats. Also, since the first four bytes of JSON are limited, you can always tell if it's 8, 16, or 32 and its endian-ness. – Jason Coco May 15 '14 at 5:20 ...
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What is the difference between currying and partial application?

... Partial application transforms a function from n-ary to (x - n)-ary, currying from n-ary to n * 1-ary. A partially applied function has a reduced scope (of application), that is, Add7 is less expressive than Add. A curried function on the other ...
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How can I measure the speed of code written in PHP? [closed]

...ere as Ruxit is built by ex Dynatrace Employees. This allowed Dynatrace to transform to a truly SaaS model for better. Say goodbye to that bulky Java client if you'd like to. There are free/open-source options now as well. Checkout Apache Skywalking which is very popular in China among their top tec...