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Help needed in excluding certain word patterns

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# 1  
Old 11-04-2015
Help needed in excluding certain word patterns
Hi,

I need help with following. I need to exclude words that match following patterns
a. more than length 4 (example SBRAP)
b. contains mixture uppercase and lower case regardless of the length (example GSpD)

File contains
Code:
COFpC
MCHX
SP
SNFCA
GEH
SBRAP
DGICA
JPMpE
WFCpP
GSpD
AXL
RGS
PREpD
EVN
CNOB
CUBI
TOWN
GSpD
RGS
EVN
CNOB
CUBI

Thanks
jak
# 2  
Old 11-04-2015
Code:
perl -nle 'print unless (length > 4 or (/[A-Z]/ and /[a-z]/))' jakSun8.file
MCHX
SP
GEH
AXL
RGS
EVN
CNOB
CUBI
TOWN
RGS
EVN
CNOB
CUBI

# 3  
Old 11-05-2015
Thanks Aia but i don't have perl installed on my system. Any awk or sed solution please?

Thanks,
jak
# 4  
Old 11-05-2015
Any attempt from your side, please?

Code:
awk 'length <=4 && !(/[a-z]/ && /[A-Z]/)' file

or
Code:
awk 'length <=4 && !(tolower($0) == $0 || toupper($0) == $0)' file

# 5  
Old 11-05-2015
Thanks RudiC. I am not well versed in scripting language but appreciate folks like you who help out generously on daily basis.

Thanks,
jak
# 6  
Old 11-05-2015
Sed version:
--
Code:
sed '/.\{5\}/d; /[a-z][A-Z]/d; /[A-Z][a-z]/d' file

or (better)
Code:
sed '/.\{5\}/d; /[[:lower:]][[:upper:]]/d; /[[:upper:]][[:lower:]]/d' file

--
If we only want to print either only lower case or only uppercase (not allowing any other characters)

Code:
sed -n '/^[A-Z]\{1,4\}$/p; /^[a-z]\{1,4\}$/p' file

or (better)
Code:
sed -n '/^[[:upper:]]\{1,4\}$/p; /^[[:lower:]]\{1,4\}$/p' file

or grep:
Code:
grep -Ee '^[[:upper:]]{1,4}$' -e '^[[:lower:]]{1,4}$' file

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