Data commit

Task/Text-processing-1/JavaScript/text-processing-1.js

@@ -0,0 +1,69 @@
+var filename = 'readings.txt';
+var show_lines = 5;
+var file_stats = {
+    'num_readings': 0,
+    'total': 0,
+    'reject_run': 0,
+    'reject_run_max': 0,
+    'reject_run_date': ''
+};
+
+var fh = new ActiveXObject("Scripting.FileSystemObject").openTextFile(filename, 1); // 1 = for reading
+while ( ! fh.atEndOfStream) {
+    var line = fh.ReadLine();
+    line_stats(line, (show_lines-- > 0));
+}
+fh.close();
+
+WScript.echo(
+    "\nFile(s)  = " + filename + "\n" +
+    "Total    = " + dec3(file_stats.total) + "\n" +
+    "Readings = " + file_stats.num_readings + "\n" +
+    "Average  = " + dec3(file_stats.total / file_stats.num_readings) + "\n\n" +
+    "Maximum run of " + file_stats.reject_run_max +
+    " consecutive false readings ends at " + file_stats.reject_run_date
+);
+
+function line_stats(line, print_line) {
+    var readings = 0;
+    var rejects = 0;
+    var total = 0;
+    var fields = line.split('\t');
+    var date = fields.shift();
+
+    while (fields.length > 0) {
+        var value = parseFloat(fields.shift());
+        var flag = parseInt(fields.shift(), 10);
+        readings++;
+        if (flag <= 0) {
+            rejects++;
+            file_stats.reject_run++;
+        }
+        else {
+            total += value;
+            if (file_stats.reject_run > file_stats.reject_run_max) {
+                file_stats.reject_run_max = file_stats.reject_run;
+                file_stats.reject_run_date = date;
+            }
+            file_stats.reject_run = 0;
+        }
+    }
+
+    file_stats.num_readings += readings - rejects;
+    file_stats.total += total;
+
+    if (print_line) {
+        WScript.echo(
+            "Line: " + date + "\t" +
+            "Reject: " + rejects + "\t" +
+            "Accept: " + (readings - rejects) + "\t" +
+            "Line_tot: " + dec3(total) + "\t" +
+            "Line_avg: " + ((readings == rejects) ? "0.0" : dec3(total / (readings - rejects)))
+        );
+    }
+}
+
+// round a number to 3 decimal places
+function dec3(value) {
+    return Math.round(value * 1e3) / 1e3;
+}