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Quick unix command to display specific lines in the middle of a file?
...thod 3, efficient on large files
method 3 efficient on large files
fastest way to display specific lines
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cocktail party algorithm SVD implementation … in one line of code?
...t with the corresponding magnitude to X space.
I don't have voice data to test, but in my understanding, by means of SVD, the components fall into the similar orthogonal vectors are hopefully be clustered with the help of unsupervised learning. Say, if the first 2 diagonal magnitudes from s are clu...
How to rename files and folder in Amazon S3?
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I just tested this and it works:
aws s3 --recursive mv s3://<bucketname>/<folder_name_from> s3://<bucket>/<folder_name_to>
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How to show only next line after the matched one?
...ere "blah" is found and then printing those lines that are one line after.
Test
Sample file:
$ cat a
0
blah1
1
2
3
blah2
4
5
6
blah3
blah4
7
Get all the lines after "blah". This prints another "blah" if it appears after the first one.
$ awk 'f&&NR==f+1; /blah/ {f=NR}' a
1
4
blah4
7
Get all...
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...都不够理想
0x2 商业侦听工具0x21 Frontline BPA® 600Frontline Test Equipment——“前线测试设备”（简称“前线”，Frontline），主要是针对各种各样的协议所做的一个“协议分析器”。“前线”系统的销售策略是“卖硬件，送软件”，而...
Is well formed without a ?
... is valid.
<!DOCTYPE html>
<html>
<head>
<title>test</title>
</head>
<body>
<input type='text' />
</body>
</html>
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Best way to do nested case statement logic in SQL Server
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Nice, I just tested to ensure that it short-circuits, and was suprised to find that it does. So if condition1 checked for a divide by zero, it appears that it's safe to do it in condition2. Not sure if this is guaranteed.
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Make: how to continue after a command fails?
...orks for me where the leading dash does not (I'm given a makefile to run a test which needs to fail, and will parse the logs later)
– Sean Houlihane
Sep 6 '17 at 9:11
add a co...
php is null or empty?
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Tested and correct. ''==null (true) while ''===null(false)
– TheLegendaryCopyCoder
Jun 16 '18 at 13:52
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How do you redirect HTTPS to HTTP?
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This has not been tested but I think this should work using mod_rewrite
RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI}
s...