!$ vs $_ difference?
74090
$_ vs !$. Last argument of the preceding command and output redirection
70705
What does `!!~` mean in javascript?
140931
What is the difference between if(!!condition) and if(condition)
72413
$ versus jQuery
82566
Why should I use $[ EXPR ] instead of $(( EXPR ))?
111133
Difference between 'ls' and 'echo $(ls)'
135638
The difference between \e and ^[
42605
Is there a technical reason to use > (<) instead of != when incrementing by 1 in a 'for' loop?
42711
What does $$ mean in the shell?
15469
Difference between ! vs !! vs * in /etc/shadow
51160
What does !! mean in ruby?
154356
The "difference" of two ordinals
96006
What does the ??!??! operator do in C?
25451
What's the difference between :: (double colon) and -> (arrow) in PHP?
47477
What is "!!" in C?
73977
What is indirect expansion? What does ${!var*} mean?
14779
How do ${0##*/} and ${0%/*} work?