grep return only one match per line -

example file :

foobar random text foobar random text foobar text text text 

if use grep , search word foobar, how can prevent grep return me first line 3 times, because founds 3 times foobar ? have 1 return per line, if word has been found multiple times on line

simple awk alternative:

awk '/\<foobar\>/{print nr,"foobar"}' file 

the output(for exemplary input):

1 foobar 

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\< , \> mean word boundaries

nr - contains current line number

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perl:

perl -ne 'print $.," ",$1,"\n" if /\b(foobar)\b/' file 

the output:

1 foobar