大约有 44,500 项符合查询结果（耗时：0.0351秒） [XML]
How to add a border just on the top side of a UIView
...
1
2
Next
202
...
How does the Brainfuck Hello World actually work?
...
257
+100
1. Bas...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...
216
sqrtss gives a correctly rounded result. rsqrtss gives an approximation to the reciprocal, ac...
The forked VM terminated without saying properly goodbye. VM crash or System.exit called
...
1
2
Next
134
...
Rails I18n validation deprecation warning
I just updated to rails 4.0.2 and I'm getting this warning:
5 Answers
5
...
Turning multi-line string into single comma-separated
...
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...
SQL WHERE condition is not equal to?
...
You can do like this
DELETE FROM table WHERE id NOT IN ( 2 )
OR
DELETE FROM table WHERE id <> 2
As @Frank Schmitt noted, you might want to be careful about the NULL values too. If you want to delete everything which is not 2(including the NULLs) then add OR id IS NULL...
Can someone explain the traverse function in Haskell?
...
121
traverse is the same as fmap, except that it also allows you to run effects while you're rebuil...
How to create enum like type in TypeScript?
...
MrZebra
11.2k77 gold badges3535 silver badges4747 bronze badges
answered Oct 2 '12 at 9:45
Steve LuccoSteve Lucc...