AWK dictionary

Another really simple awk program, just a mutation from the previous post. It works like a dictionary, if you put two words in it, it stores the pair. If you type only one word: it will search for a match.

BEGIN {

ARGC = 2; ARGV[1] = "-"

do {

printf("prompt>")

while ((input = getline) > 0)

if ($0 ~ "exit") {

print "Exit!"

input = 0;

break

} else if(NF > 1)

{

a[$1] = $2;

break

} else if(NF == 1)

{

print a[$1];

break

}

} while (input > 0)

}

A sample run is here:

prompt>He Helium

prompt>Ne Neon

prompt>He

Helium

prompt>Ne

Neon