ernestom · February 13, 2012 18:38 · Feb 13, 2012
diff --git a/word-frequency-counter.js b/word-frequency-counter.js
@@ -0,0 +1,39 @@
+(function () {
+    function getBodyText(win) {
+        var doc = win.document,
+            body = doc.body,
+            selection, range, bodyText;
+        if (body.createTextRange) {
+            return body.createTextRange().text;
+        } else if (win.getSelection) {
+            selection = win.getSelection();
+            range = doc.createRange();
+            range.selectNodeContents(body);
+            selection.addRange(range);
+            bodyText = selection.toString();
+            selection.removeAllRanges();
+            return bodyText;
+        }
+    }
+    var words = getBodyText(window).trim().replace(/[\r\n\.\,\;]+/g, ' ').replace(/\s+/g, ' ').split(' '),
+        count = {},
+        sorted = [];
+
+    for (var w in words) if (words.hasOwnProperty(w)) {
+        var word = words[w];
+        count[word] = count[word] ? count[word] + 1 : 1;
+    }
+
+    for (var w in count) if (count.hasOwnProperty(w)) {
+        sorted.push([w, count[w]])
+    }
+
+    var s = sorted.sort(function (a, b) {
+        return b[1] - a[1];
+    });
+
+    for (var s in sorted.slice(0, 100)) {
+        var c = sorted[s];
+        console.log(c[1] + ' -> ' + c[0])
+    }
+})();