change newlines to spaces (or commas or whatever). Acts as a filter or can have c/l args

alias nl2space="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{ }, @F) , qq{\n};}' "
# newline to space; the whack before dollar-underbar is required alias nl2space="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{ }, @F) , qq{\n};}' " # newline to comma; the whack before dollar-underbar is required alias nl2,="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{,}, @F) , qq{\n};}' " PROMPT> cat /tmp/foo foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010 # 'tr' does not give a newline after it run. Makes a messy commandline. PROMPT> cat /tmp/foo|tr "\n" ' ' foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010 $PROMPT> tr "\n" ' ' /tmp/foo # 'tr' does not take arguements PROMPT> tr "\n" ' ' /tmp/foo tr: extra operand `/tmp/foo' Try `tr --help' for more information. # 'nl2space' is a filter and takes arguements, adds a newline after it runs. PROMPT> cat /tmp/foo| nl2space foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010 PROMPT> nl2space /tmp/foo foo-001 foo-002 foo-003 foo-004 foo-005 foo-006 foo-007 foo-008 foo-009 foo-010

0
By: relay
2009-10-01 02:22:23

What Others Think

The "downsides" of tr you cite are easily fixed with just a little shell syntax. To add a trailing newline, just wrap it in an echo: echo $(cat /tmp/foo | tr '\n' ' ' ) and also, you can make tr filter the contents of a file with a redirection: tr "\n" ' ' </tmp/foo
bwoodacre · 548 weeks and 3 days ago
cat /tmp/foo | xargs
coresh · 438 weeks and 2 days ago
great one!
emphazer · 88 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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