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How to list running screen sessions?
...n/screen/
/var/run/screen/:
total 1
drwxrwxr-x 4 root utmp 96 Mar 1 2005 .
drwxr-xr-x 10 root root 840 Feb 1 03:10 ..
drwx------ 2 josh users 88 Jan 13 11:33 S-josh
drwx------ 2 root root 48 Feb 11 10:50 S-root
/var/run/screen/S-josh:
total 0
drwx------ 2 josh users 88 Jan 13 11:33 .
d...
Getting the client's timezone offset in JavaScript
...d UTC and negative if it is ahead. For example, if your time zone is UTC+10 (Australian Eastern Standard Time), -600 will be returned. Daylight savings time prevents this value from being a constant even for a given locale
Mozilla Date Object reference
Note that not all timezones are offset by w...
Overriding superclass property with different type in Swift
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edited Dec 10 '19 at 10:00
Dávid Pásztor
34.7k88 gold badges4949 silver badges7474 bronze badges
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Calculating Distance between two Latitude and Longitude GeoCoordinates
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Nigel SampsonNigel Sampson
10k11 gold badge2525 silver badges3131 bronze badges
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Convert JavaScript string in dot notation into an object reference
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+50
recent note: While I'm flattered that this answer has gotten many upvotes, I am also somewhat horrified. If one needs to convert do...
Extracting numbers from vectors of strings
...inding a set of numbers in the start and capturing them
as.numeric(gsub("([0-9]+).*$", "\\1", years))
or
# pattern is to just remove _years_old
as.numeric(gsub(" years old", "", years))
or
# split by space, get the element in first index
as.numeric(sapply(strsplit(years, " "), "[[", 1))
...
PHP function to generate v4 UUID
...P manual, you could use this:
function gen_uuid() {
return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
// 32 bits for "time_low"
mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
// 16 bits for "time_mid"
mt_rand( 0, 0xffff ),
// 16 bits for "time_hi_and...
PHP - Extracting a property from an array of objects
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10 Answers
10
Active
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Why does my application spend 24% of its life doing a null check?
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180
The tree is massive
By far the most expensive thing a processor ever does is not executing ...
Difference between Role and GrantedAuthority in Spring Security
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380
Think of a GrantedAuthority as being a "permission" or a "right". Those "permissions" are (norma...