unix shell: replace by dictionary

Question

I have file which contains some data, like this

2011-01-02 100100 1 
2011-01-02 100200 0
2011-01-02 100199 3
2011-01-02 100235 4

and have s

Answer 1

awk 'BEGIN {
 lvl[0] = "warning"
 lvl[1] = "error"
 lvl[2] = "critical"
 }
NR == FNR {
  evt[$1] = $2; next
  } 
{
  print $2, evt[$2], lvl[$3]
  }' dictionary infile