大约有 41,000 项符合查询结果(耗时:0.0480秒) [XML]

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What reason is there to use null instead of undefined in JavaScript?

I've been writing JavaScript for quite a long time now, and I have never had a reason to use null . It seems that undefined is always preferable and serves the same purpose programmatically. What are some practical reasons to use null instead of undefined ? ...
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Java 8: How do I work with exception throwing methods in streams?

Suppose I have a class and a method 7 Answers 7 ...
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Using union and order by clause in mysql

...all select 3 as Rank, id, add_date from Table where distance between 5 and 15 ) a order by rank, id, add_date desc share | improve this answer | follow | ...
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What are the Ruby Gotchas a newbie should be warned about? [closed]

I have recently learned the Ruby programming language, and all in all it is a good language. But I was quite surprised to see that it was not as simple as I had expected. More precisely, the "rule of least-surprise" did not seem very respected to me (of course this is quite subjective). For examp...
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git: patch does not apply

...ne how to apply a patch, but instead to apply indivdual hunks it can apply and create reject files (.rej) for hunks it cannot apply. Wiggle can "apply [these] rejected patches and perform word-wise diffs". Additionally, --whitespace=fix will warn about whitespace errors and try to fix them, rather t...
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Is there still any reason to learn AWK?

...you move to more exotic systems, knowing a little awk is going to be Real Handy. awk can also be used for more than just text processing. For example one of my supervisors writes astronomy code in awk - that is how utterly old school and awesome he is. Back in his days, it was the best tool for the...
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Generic Repository With EF 4.1 what is the point

As i dig deeper in to the DbContext, DbSet and associated interfaces, I am wondering why you would need to implement a separate "Generic" Repository around these implementations? ...
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When/Why to use Cascading in SQL Server?

..., under what circumstances should you have it cascade on delete or update, and what is the reasoning behind it? 15 Answers ...
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Utilizing multi core for tar+gzip/bzip compression/decompression

I normally compress using tar zcvf and decompress using tar zxvf (using gzip due to habit). 6 Answers ...
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Swift compiler error: “non-modular header inside framework module”

Now I would like to migrate my ObjC framework to Swift and I got the following error: 20 Answers ...