大约有 43,000 项符合查询结果(耗时:0.0736秒) [XML]

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How to split a delimited string into an array in awk?

How to split the string when it contains pipe symbols | in it. I want to split them to be in array. 9 Answers ...
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How to set commands output as a variable in a batch file

Is it possible to set a statement's output of a batch file to a variable, for example: 7 Answers ...
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How do I prevent site scraping? [closed]

I have a fairly large music website with a large artist database. I've been noticing other music sites scraping our site's data (I enter dummy Artist names here and there and then do google searches for them). ...
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How do I define a method which takes a lambda as a parameter in Java 8?

In Java 8, methods can be created as Lambda expressions and can be passed by reference (with a little work under the hood). There are plenty of examples online with lambdas being created and used with methods, but no examples of how to make a method taking a lambda as a parameter. What is the syntax...
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How does database indexing work? [closed]

Given that indexing is so important as your data set increases in size, can someone explain how indexing works at a database-agnostic level? ...
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Can I have multiple primary keys in a single table?

Can I have multiple primary keys in a single table? 12 Answers 12 ...
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Pandas - Get first row value of a given column

This seems like a ridiculously easy question... but I'm not seeing the easy answer I was expecting. 7 Answers ...
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Split column at delimiter in data frame [duplicate]

I would like to split one column into two within at data frame based on a delimiter. For example, 6 Answers ...
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When do I use a dot, arrow, or double colon to refer to members of a class in C++?

Coming from other C-derived languages (like Java or C#) to C++, it is at first very confusing that C++ has three ways to refer to members of a class: a::b , a.b , and a->b . When do I use which one of these operators? ...
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Understanding REST: Verbs, error codes, and authentication

I am looking for a way to wrap APIs around default functions in my PHP-based web applications, databases and CMSs. 10 Answ...