大神们帮我分析下:(awk)

tank064

1. [benny@qycn ~]$ cat a
   
2. bc 1
   
3. abc 2
   
4. abc 3
   
5. cde 1
   
6. cde 2
   
7. fff 1
   
8. fff 2
   
9. fff 3
   
10. fff 5
    
11. fff 7
    
12. fff 9
    
13. fff 10
    
14. fff 11
    
15. fff 12
    
16. fff 13
    
17. [benny@qycn ~]$ awk '{a[$1]=a[$1]" "$2}END{for(i in a){printf i":";c=split(a[i],b);for(i=2;i<=c;i++){if(b[i]==(b[i-1]+1)){if(i==c){printf d"-"b[i]}else{if(!d)d=b[i-1]}}else{if(d){printf d"-"b[i-1]",";d=""}else{printf b[i-1]","}}};printf "\n"}}' a
    
18. cde:-2
    
19. bc:
    
20. fff:1-3,5,7,9-13
    
21. abc:9-3

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看了半天没懂。。

waker

那就再看半天试试呗

jason680

回复 1# tank064

n for number
p for next time output
id for remember last $1

$ echo 'bc 1
abc 2
abc 3
cde 1
cde 2
fff 1
fff 2
fff 3
fff 5
fff 7
fff 9
fff 10
fff 11
fff 12
fff 13' | awk '{if($1!=id){if(id!=""){print p};printf $1":"$2;p="";n=$2}else{if(n+1==$2)p="-"$2;else{printf p","$2;p=""}n=$2}id=$1}END{print p}'
bc:1
abc:2-3
cde:1-2
fff:1-3,5,7,9-13

   

yestreenstars

1. awk '{if(a[$1]){if(gensub(/.*[-,]([0-9]+)$/,"\\1",1,a[$1])+1==$2)a[$1]=a[$1]"-"$2;else a[$1]=a[$1]","$2}else a[$1]=$2}END{for(i in a){gsub(/-[^,]*-/,"-",a[i]);print i":"a[i]}}' urfile

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1. bc:1
   
2. abc:2-3
   
3. cde:1-2
   
4. fff:1-3,5,7,9-13

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