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Why does modern Perl avoid UTF-8 by default?
...2 or better via:
use v5.12; # minimal for unicode string feature
use v5.14; # optimal for unicode string feature
Enable warnings, since the previous declaration only enables strictures and features, not warnings. I also suggest promoting Unicode warnings into exceptions, so use both these lines,...
Regular expression that matches valid IPv6 addresses
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254
I was unable to get @Factor Mystic's answer to work with POSIX regular expressions, so I wrote o...
最新版AI伴侣测试历程 - HarmonyOS NEXT - 清泛IT社区，为创新赋能！
...37:16 PM] I/→ SimpleYail 执行
[6:37:16 PM] I/[YAIL] 解析 YAIL (541 chars)
[6:37:16 PM] I/[YAIL] 解析得到 1 个顶层表达式
[6:37:16 PM] I/[YAIL] 执行[0]: (begin ...) len=3
[6:37:16 PM] I/[YAIL] begin: 2 个子表达式
[6:37:16 PM] I/[YAIL] begin[1]: (require) len=2...
Remove duplicate elements from array in Ruby
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edited May 20 at 4:57
the Tin Man
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How to test valid UUID/GUID?
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439
Currently, UUID's are as specified in RFC4122. An often neglected edge case is the NIL UUID, n...
Validating IPv4 addresses with regexp
I've been trying to get an efficient regex for IPv4 validation, but without much luck. It seemed at one point I had had it with (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
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Differences between .NET 4.0 and .NET 4.5 in High level in .NET
Eager to know Differences between .NET 4.0 and .NET 4.5 in High level in .NET and also differences in ASP.NET, C# also in these frameworks
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Redefine tab as 4 spaces
...on what you mean. Do you want actual tab characters in your file to appear 4 spaces wide, or by "tab" do you actually mean an indent, generated by pressing the tab key, which would result in the file literally containing (up to) 4 space characters for each "tab" you type?
Depending on your answer, ...
Print all but the first three columns
...tion that does not add extra leading or trailing whitespace:
awk '{ for(i=4; i<NF; i++) printf "%s",$i OFS; if(NF) printf "%s",$NF; printf ORS}'
### Example ###
$ echo '1 2 3 4 5 6 7' |
awk '{for(i=4;i<NF;i++)printf"%s",$i OFS;if(NF)printf"%s",$NF;printf ORS}' |
tr ' ' '-'
4-5-6-7
Sudo...
List of lists changes reflected across sublists unexpectedly
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