大约有 44,400 项符合查询结果（耗时：0.0388秒） [XML]
How to add a border just on the top side of a UIView
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How to check if a variable is an integer in JavaScript?
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How does the Brainfuck Hello World actually work?
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+100
1. Bas...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
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sqrtss gives a correctly rounded result. rsqrtss gives an approximation to the reciprocal, ac...
Rails I18n validation deprecation warning
I just updated to rails 4.0.2 and I'm getting this warning:
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The forked VM terminated without saying properly goodbye. VM crash or System.exit called
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How would you implement an LRU cache in Java?
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Can someone explain the traverse function in Haskell?
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traverse is the same as fmap, except that it also allows you to run effects while you're rebuil...
Turning multi-line string into single comma-separated
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You can use awk and sed:
awk -vORS=, '{ print $2 }' file.txt | sed 's/,$/\n/'
Or if you want to use a pipe:
echo "data" | awk -vORS=, '{ print $2 }' | sed 's/,$/\n/'
To break it down:
awk is great at handling data broken down into fields
-vORS=, sets the "output re...