Using `$$...$$` vs`\[...\]`
39457
Why is \[ ... \] preferable to $$ ... $$?
43071
"(" or "\left(" parentheses?
45816
What do $< and $@ represent in a Makefile?
103300
equation* environment or \[ \]?
117107
What is the difference between '.' and 'source' in shells?
109839
What is the Necessity of $...$ Around Numbers?
67917
what does $('') do?
143637
What does ${ } mean in PHP syntax?
21131
bash nested case syntax and ;; terminators
45662
What is `$?` ? Is it a variable?
153593
When and why did ^ and $ take on their meanings of "beginning of line" and "end of line?"
1375
What is the proper use of [square brackets] in quotes?
38194
Usage of enclosing braces {} as arguments to commands and their options
54322
What is the difference between the "...", '...', $'...', and $"..." quotes in the shell?
119974
What does << mean in Java?
96938
What's the difference between using > and >> in shell?
34304
Precedence of the shell logical operators &&, ||