Shell Programming and Scripting

{
        for(i=1;i<=NF;i++) {
                uni[$i]++;
        }
        for(i in uni) {
                print uni[i], i;
        }

}

{
        for(i=1;i<=NF;i++) {
                uni[$i]++;
        }
        
        for(i in uni) {
                if ( uni[i] == 1 ) {
                 print i;
                }
        }
}

$ print Some_String_Here 123 123 123 321 321 321 3432 3221 557 886 321 321|
awk 'END{printf "\n"}!_[$1]++' ORS=" " RS=" " 
Some_String_Here 123 321 3432 3221 557 886

$ print Some_String_Here 123 123 123 321 321 321 3432 3221 557 886 321 321|
perl -lane'print join" ",grep!$_{$_}++,@F'
Some_String_Here 123 321 3432 3221 557 886

nawk '{
for(i=1;i<=NF;i++)
	arr[$i]=1
}
END{
for(i in arr)
	printf("%s ",i)
print ""
}' filename