new tasks

Task/Arrays/AWK/arrays.awk

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+BEGIN {
+  # to make an array, assign elements to it
+  array[1] = "first"
+  array[2] = "second"
+  array[3] = "third"
+  alen = 3  # want the length? store in separate variable
+
+  # or split a string
+  plen = split("2 3 5 7 11 13 17 19 23 29", primes)
+  clen = split("Ottawa;Washington DC;Mexico City", cities, ";")
+
+  # retrieve an element
+  print "The 6th prime number is " primes[6]
+
+  # push an element
+  cities[clen += 1] = "New York"
+
+  dump("An array", array, alen)
+  dump("Some primes", primes, plen)
+  dump("A list of cities", cities, clen)
+}
+
+function dump(what, array, len,    i) {
+  print what;
+
+  # iterate an array in order
+  for (i = 1; i <= len; i++) {
+    print "  " i ": " array[i]
+  }
+}