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Sed, Inline replacement of string with spaces

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# 1  
Old 08-24-2018
Sed, Inline replacement of string with spaces
Hello,
Just surfed on the web for probable answers but could not get them working.
I wish to replace the string containing spaces by another phrase but below answers did not work.

My string is:
Code:
PAIN & GAIN

I wish to convert it to:
Code:
P&G

I just need it working with sed with function -i


First try:
Code:
sed -i 's/PAIN\s\&\s\GAIN/P&G/g' file.txt

It gives:
Code:
PPAIN & GAING

Other code:
Code:
sed -i 's/PAIN & GAIN/P&G/g' file.txt

It gives:
Code:
PPAIN & GAING

This is not giving expected result also:
Code:
sed -i 's/"PAIN[[:space:]]&[[:space:]]GAIN"/"P&G"/g' file.txt

This one also not worked:
Code:
sed -i "s/PAIN[[:space:]]&[[:space:]]GAIN/P&G/g" file.txt

I'd appreciate if you would help me out.

Many Thanks
Boris
# 2  
Old 08-24-2018
Code:
 echo 'PAIN & GAIN' | sed 's/PAIN\s&\sGAIN/P\&G/g'

This User Gave Thanks to vgersh99 For This Post:
baris35
# 3  
Old 08-24-2018
How about

Code:
sed -r 's/(^| )(.)[^ ]*( |$)/\2/g' file
P&G

This User Gave Thanks to RudiC For This Post:
baris35
# 4  
Old 08-24-2018
Hello Vgersh99,
This way, sorted out:

Code:
sed -i 's/PAIN\s&\sGAIN/P\&G/g' file.txt


Many thanks!
Boris
# 5  
Old 08-24-2018
A literal & in an RE has no special meaning - no \ escape needed.
But in the substitution string the & has a special meaning: it refers to the matched portion of the RE.
& and \ are the only literals that need to be \ escaped in the substitution string.
This User Gave Thanks to MadeInGermany For This Post:
baris35
# 6  
Old 08-24-2018
Hello MadeInGermany,
Could you please let me know what RE stands for ?


Thanks
Boris
# 7  
Old 08-25-2018
Regular Expression.
This User Gave Thanks to RudiC For This Post:
baris35
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