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Regular expression to match DNS hostname or IP Address?
...mes only (and not intranet), I wrote the following snipped, a mix of shell/php but it should be applicable as any regular expression.
first go to ietf website, download and parse a list of legal level 1 domain names:
tld=$(curl -s http://data.iana.org/TLD/tlds-alpha-by-domain.txt | sed 1d | cut ...
Import a file from a subdirectory?
...nguage shouldn't impose its way of loading files across the filesystem. In PHP we solved the problem by letting the userland code register multiple autoloading functions that are called when a namespace/class is missing. Then the community has produced the PSR-4 standard and Composer implements it, ...
Why should the “PIMPL” idiom be used? [duplicate]
...
Because you want Purr() to be able to use private members of CatImpl. Cat::Purr() would not be allowed such an access without a friend declaration.
Because you then don't mix responsibilities: one class implements, one class forwards.
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Write lines of text to a file in R
...riteLines() is roughly ten times faster then the combination of sink() and cat()
– rafa.pereira
Oct 1 '15 at 9:36
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How does TestFlight do it?
...ions.
HockeyKit: Open source project for hosting beta versions on your own PHP5 server with additional functionalities like an client for In-App-Updates, automatic device specific web sites and handling multiple applications. Completely file and directory based.
HockeyApp: Web Service for beta build...
How can I get Docker Linux container information from within the container itself?
...tainer id can be found in /proc/self/cgroup
So you can get the id with :
cat /proc/self/cgroup | grep -o -e "docker-.*.scope" | head -n 1 | sed "s/docker-\(.*\).scope/\\1/"
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how to restart only certain processes using supervisorctl?
...k
[supervisord]
logfile=supervisord.log
pidfile=supervisord.pid
[program:cat1]
command=cat
[program:cat2]
command=cat
[program:cat3]
command=cat
[group:foo]
programs=cat1,cat3
[supervisorctl]
serverurl=unix://%(here)s/supervisor.sock
[rpcinterface:supervisor]
supervisor.rpcinterface_factory =...
List all indexes on ElasticSearch server?
...ie" : {
"aliases" : {
"rumpleteazer" : { },
"that_horrible_cat" : { }
}
}
}
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How do I use the lines of a file as arguments of a command?
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If your shell is bash (amongst others), a shortcut for $(cat afile) is $(< afile), so you'd write:
mycommand "$(< file.txt)"
Documented in the bash man page in the 'Command Substitution' section.
Alterately, have your command read from stdin, so: mycommand < file.txt
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Replace string within file contents
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If you are on linux and just want to replace the word dog with catyou can do:
text.txt:
Hi, i am a dog and dog's are awesome, i love dogs! dog dog dogs!
Linux Command:
sed -i 's/dog/cat/g' test.txt
Output:
Hi, i am a cat and cat's are awesome, i love cats! cat cat cats!
Origina...