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Replace long space to become one space?

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# 8  
Old 11-26-2009
Quote:
Originally Posted by jlliagre
Puzzling ... but it works (need nawk or gawk under Solaris).
not at all. Its documented in gawk manual. $1=$1 just does a "reformat" of the fields.
# 9  
Old 11-26-2009
It is indeed documented but puzzling anyway for anyone not aware assigning fields has the side effect of reformatting the output. Assigning a field to its own value looks otherwise useless. Thanks for sharing that trick !
# 10  
Old 11-26-2009
It happens because multiple spaces are read into awk as a single field separator. When print $0 awk reinserts fields separators, i.e., whatever OFS is set to be: default is a single space.
# 11  
Old 11-26-2009
Code:
tr -s "  " " "

# 12  
Old 11-26-2009
Code:
xargs -n11 <log.txt

# 13  
Old 11-26-2009
Quote:
Originally Posted by jim mcnamara
It happens because multiple spaces are read into awk as a single field separator. When print $0 awk reinserts fields separators, i.e., whatever OFS is set to be: default is a single space.
This is true but only if a field has been overwritten.
Code:
$ echo 'a    b c' | nawk '{print $0}'
a    b c
$ echo 'a    b c' | nawk '{$9=$9 ; print $0}'
a b c

This definitely works but is some kind of a hack as based on a side effect of an otherwise no op.
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