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Difference between \b and \B in regex
...one space further left and right.
On the other hand, when searching for \bcat\b word boundaries behave more intuitively, and it matches " cat " as expected.
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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 =...
How to read a file into a variable in shell?
...In cross-platform, lowest-common-denominator sh you use:
#!/bin/sh
value=`cat config.txt`
echo "$value"
In bash or zsh, to read a whole file into a variable without invoking cat:
#!/bin/bash
value=$(<config.txt)
echo "$value"
Invoking cat in bash or zsh to slurp a file would be considered a...
Implements vs extends: When to use? What's the difference?
... void main(String args[]){
Dog dog = new Dog("Tiger",16);
Cat cat = new Cat("July",20);
System.out.println("Dog:"+dog);
System.out.println("Cat:"+cat);
dog.remember();
dog.protectOwner();
Learn dl = dog;
dl.learn();
cat.reme...
Combine two columns of text in pandas dataframe
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if both columns are strings, you can concatenate them directly:
df["period"] = df["Year"] + df["quarter"]
If one (or both) of the columns are not string typed, you should convert it (them) first,
df["period"] = df["Year"].astype(str) + df["quarter"]
Beware of...
Can I export a variable to the environment from a bash script without sourcing it?
... source or . to execute the script in the context of the calling shell:
$ cat set-vars1.sh
export FOO=BAR
$ . set-vars1.sh
$ echo $FOO
BAR
Another way is to have the script, rather than setting an environment variable, print commands that will set the environment variable:
$ cat set-vars2.sh
#...
Unix command to prepend text to a file
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printf '%s\n%s\n' "to be prepended" "$(cat text.txt)" >text.txt
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Why implement interface explicitly?
...p with unused 'orphaned' public methods
strong typing:
To illustrate supercat's story with an example, this would be my preferred sample code, implementing ICloneable explicitly allows Clone() to be strongly typed when you call it directly as a MyObject instance member:
public class MyObject : ICl...
PHP expects T_PAAMAYIM_NEKUDOTAYIM?
... @Web_Developer, the reason that happens is because if you have a foreach($cats as cat the only acceptable character after the cat for a syntactically valid statement is a ::, as it would allow you to specify a static property of some class called cat. Eg, if cat class has a public static member cal...
Remove duplicate lines without sorting [duplicate]
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Surely it would be less obfuscated to name that array e.g. seen instead of x, to avoid giving newbies the impression that awk syntax is line noise
– Josip Rodin
Dec 21 '15 at 10:43
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