What is the difference between !! and nothing?
47979
Double Negation in C++
153588
"I don't know nothing" vs "I don't know anything"
35549
What is the difference between the | and || or operators?
103008
What does !$ mean?
141279
Is there a difference between  and ?
125067
What is "#!' in a script file?
143770
Why does !! inside an alias not work?
47477
What is "!!" in C?
111925
What's the difference between !, %, and @ in replacement tokens?
152780
what is the difference between null != object and object!=null
63088
What does the '!!!' syntax mean in javascript?
127005
' ... != null' or 'null != ....' best performance?
143719
How does !! work in bash?
84584
Difference between | and || or & and && for comparison
41529
Can "nor" be used without "neither"?
51833
What does `!!` mean in `sudo !!`?
69495
Difference between \if and \ifx