JavaScript-Packer/compare-lists-for-new-and-removed.htm

## compare-lists-for-new-and-removed.htm
<html><head><title>Compare 2 Lists For Differences. Changes Added To List &amp; What Was Removed From Original List</title></head><body>

<script>
var s1 = 'Kvn Mrffy Brwn\n\
Lrran Brwn Lavall\n\
Rbrt Jsph\n\
Wayn Brstw\n\
Lrr Brwn Tschrwnsk\n\
Krs Oltn\n\
Paln Bckndal - Glnvw Park Scndary Schl\n\
Andr Myrs\n\
Sd Dsqd\n\
Bvn San\n\
Grgry Rbrt Slr - Ownr, Dvlpr, Dsgnr at OMGTap\n\
Davd Btlr\n\
Mk Razzl\n\
Cathy Ealst\n\
Gln Paln-Haskn\n\
Dan Brtt\n\
Mchal Lng\n\
Jhn Ha-thn\n\
Bn Strngarmd';

var s2 = 'Ethann Brwn\n\
Kvn Mrffy Brwn\n\
Lrran Brwn Lavall\n\
Rbrt Jsph\n\
www.WHAK.com\n\
Wayn Brstw\n\
Mchal Hnt\n\
Lrr Brwn Tschrwnsk\n\
Krs Oltn\n\
Sd Dsqd\n\
Bvn San\n\
Grgry Rbrt Slr - Ownr, Dvlpr, Dsgnr at OMGTap\n\
Davd Btlr\n\
Mk Razzl\n\
www.GIFSTA.com\n\
Gln Paln-Haskn\n\
Dan Brtt\n\
Mchal Lng\n\
Jhn Ha-thn\n\
Bn Strngarmd';

function differces(n, l) {
  for (var e = "" == n ? [] : n.split(/\n/), t = "" == l ? [
  ] : l.split(/\n/), r = {}, o = {}, u = 0; u < t.length; u++) {
    null == r[t[u]] && (r[t[u]] = {
      "R": [],
      "o": null
    }), r[t[u]].R.push(u);
  }
  for (u = 0; u < e.length; u++) {
    null == o[e[u]] && (o[e[u]] = {
      "R": [],
      "n": null
    }), o[e[u]].R.push(u);
  }
  for (u in r) {
    1 == r[u].R.length && void 0 !== o[u] && 1 == o[u].R.length && (t[r[u].R[0]] = {
      "T": t[r[u].R[0]],
      "X": o[u].R[0]
    }, e[o[u].R[0]] = {
      "T": e[o[u].R[0]],
      "X": r[u].R[0]
    });
  }
  for (u = 0; u < t.length - 1; u++) {
    null != t[u].T && null == t[u + 1].T && t[u].X + 1 < e.length && null == e[t[u
    ].X + 1].T && t[u + 1] == e[t[u].X + 1] && (t[u + 1] = {
      "T": t[u + 1],
      "X": t[u].X + 1
    }, e[t[u].X + 1] = {
      "T": e[t[u].X + 1],
      "X": u + 1
    });
  }
  for (u = t.length - 1; u > 0; u--) {
    null != t[u].T && null == t[u - 1].T && 0 < t[u].X && null == e[t[u].X - 1
    ].T && t[u - 1] == e[t[u].X - 1] && (t[u - 1] = {
      "T": t[u - 1],
      "X": t[u].X - 1
    }, e[t[u].X - 1] = {
      "T": e[t[u].X - 1],
      "X": u - 1
    });
  }
  if (r = "", 0 == t.length) {
    for (o = 0; o < e.length; o++) {
      r += "*REMOVED* " + e[o] + "\n";
    }
  } else {
    if (null == t[0].T) {
      for (l = 0; l < e.length && null == e[l].T; l++) {
        r += "*REMOVED* " + e[l] + "\n";
      }
    }
    for (o = 0; o < t.length; o++) {
      if (null == t[o].T) {
        r += "*ADDED* " + t[o] + "\n";
      } else {
        for (u = "\n", l = t[o].X + 1; l < e.length && null == e[l].T; l++) {
          u += "*REMOVED* " + e[l] + "\n";
        }
        r += " " + t[o].T + u;
      }
    }
  }
  return r;
}
document.write('<h1><a href="http://www.whak.ca">WHAK.com</a>\'s List Difference Comparison Generator</h1><style>label {display:block;}</style>'+
'<label>List #1 &amp; List #2</label><textarea id="list_1" rows="20" cols="77" onmouseover="this.select();">' + s1 +
'<\/textarea> VERSUS <textarea onmouseover="this.select();" id="list_2" rows="20" cols="77">' + s2 +
'<\/textarea><label>Changes From List #1 Compared To List #2</label><textarea onmouseover="this.select();" id="results" rows="22" cols="77">' +
'<\/textarea><p><input type="button" onclick="results.value=differces(list_1.value, list_2.value);" value="Compare"></p>');
</script>
</body></html>