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How to delete from a text file, all lines that contain a specific string?
How would I use sed to delete all lines in a text file that contain a specific string?
17 Answers
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When a 'blur' event occurs, how can I find out which element focus went *to*?
Suppose I attach an blur function to an HTML input box like this:
23 Answers
23
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20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...因。这些监控命令足够你选择适合你的监控场景。
1. top —Linux系统进程监控
top 命令是性能监控程序，它可以在很多 Linux/Unix 版本下使用，并且它也是 Linux 系统管理员经常使用的监控系统性能的工具。Top 命令可以定期显示所...
What is the curiously recurring template pattern (CRTP)?
Without referring to a book, can anyone please provide a good explanation for CRTP with a code example?
5 Answers
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Ruby optional parameters
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This isn't possible with ruby currently. You can't pass 'empty' attributes to methods. The closest you can get is to pass nil:
ldap_get(base_dn, filter, nil, X)
However, this will set the scope to nil, not LDAP::LDAP_SCOPE_SUBTREE.
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How can I find the current OS in Python? [duplicate]
... and architectures (x86, x64, Itanium, power pc, sparc) is available here: https://github.com/hpcugent/easybuild/wiki/OS_flavor_name_version
e.g. Solaris on sparc gave:
Python version: ['2.6.4 (r264:75706, Aug 4 2010, 16:53:32) [C]']
dist: ('', '', '')
linux_distribution: ('', '', '')
system: Sun...
Regular expression to stop at first match
... item:
[\s\S]*?(?:location="[^"]*")[\s\S]* Replace with: $1
Explaination: https://regex101.com/r/ZcqcUm/2
For completeness, this gets the last one. This is greedy [\s\S]*
The last item:[\s\S]*(?:location="([^"]*)")[\s\S]*
Replace with: $1
Explaination: https://regex101.com/r/LXSPDp/3
There...
sed one-liner to convert all uppercase to lowercase?
I have a textfile in which some words are printed in ALL CAPS. I want to be able to just convert everything in the textfile to lowercase, using sed . That means that the first sentence would then read, 'i have a textfile in which some words are printed in all caps.'
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Why no generics in Go?
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Go 2
There is a draft design for generics at https://blog.golang.org/go2draft.
Go 1
Russ Cox, one of the Go veterans wrote a blog post entitled The Generic Dilemma, in which he asks
…do you want slow programmers, slow compilers and bloated binaries, or slow exec...
How to add multiple columns to a table in Postgres?
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