replace text based on a dictionary

Question

I need to do something similar to this post (but with a twist). That is why I am asking.

unix shell: replace by dictionary

I have a dictionary(dict.txt). I

Answer 1

Usage: awk -f foo.awk dict.dat user.dat
http://www.gnu.org/software/gawk/manual/html_node/String-Functions.html
http://www.gnu.org/software/gawk/manual/html_node/Arrays.html

NR == FNR {
  rep[$1] = $2
  next
} 

{
  for (key in rep)
    gsub(key, rep[key])
  print
}