How to match any non white space character except a particular one?
Solution 1:
You can use a character class:
/[^\s\\]/
matches anything that is not a whitespace character nor a \. Here's another example:
[abc] means "match a, b or c"; [^abc] means "match any character except a, b or c".
Solution 2:
You can use a lookahead:
/(?=\S)[^\\]/
Solution 3:
This worked for me using sed [Edit: comment below points out sed doesn't support \s]
[^ ]
while
[^\s]
didn't
# Delete everything except space and 'g'
echo "ghai ghai" | sed "s/[^\sg]//g"
gg
echo "ghai ghai" | sed "s/[^ g]//g"
g g