Updates.

climbgrades/module.js

@@ -0,0 +1,100 @@
+
+
+var uiaa_pattern = /^([3-9])([\+\-])?(?:(?:(\/)[3-9](?:[\+\-])?)?)?$/;
+
+// Grades
+// 3+
+// 5+/6-
+function GetSportGradeFromUIAA(rating) {
+  return 3.0 * rating - 7.0;
+}
+
+
+function GetUIAAFromSportGrade(grade) {
+  return (grade + 7.0) / 3.0;
+}
+
+
+function ParseSportGradeFromUIAA(uiaa) {
+  m = uiaa_pattern.exec(uiaa);
+  sport_grade = -1;
+  if (m !== null) {
+    grade = m[1];
+    sport_grade = GetSportGradeFromUIAA(grade);
+    if (m[2] != undefined) {
+      if (m[2] === '+') {
+        sport_grade = sport_grade + 1;
+      } else {
+        sport_grade = sport_grade - 1;
+      }
+    }
+
+    if (m[3] != undefined) {
+      sport_grade = sport_grade + 0.5;
+    }
+  }
+
+  return sport_grade;
+}
+
+
+function UIAAFromSportGrade(grade) {
+  rating = GetUIAAFromSportGrade(Math.round(grade));
+  rating_decimal = Math.floor(Math.round(rating,1));
+  slash_symbol = "";
+  if (((rating_decimal + 1) - rating) <= 0.5) {
+    slash_symbol = "/";
+  }
+  follow_symbol = "";
+  delta_from_previous = GetSportGradeFromUIAA(rating_decimal - 1);
+  if (delta_from_previous === 2) {
+    follow_symbol = "-";
+  } else if (delta_from_previous === 4) {
+    follow_symbol = "+";
+  }
+  // recurse if needed
+  follow_on = "";
+  if (slash_symbol === "/") {
+    follow_on = UIAAFromSportGrade(Math.ceil(Math.round(grade)) + 1);
+  }
+
+  str_rating = rating_decimal.toString() + follow_symbol + slash_symbol + follow_on;
+  return str_rating;
+}
+
+
+function print(str) {
+  console.log(str);
+}
+
+
+function Main() {
+  var arguments = process.argv.slice(2);
+  if (arguments.length == 0) {
+    console.log("Usage: " + process.argv[1] + 
+                " <space separated UIAA graded climbs>");
+    return 1;
+  }
+
+  accum = 0.0;
+  climb_count = 0;
+  for (var i = 0; i < arguments.length; i++) {
+    var arg = arguments[i];
+    sport_grade = ParseSportGradeFromUIAA(arg);
+    if (sport_grade < 0) {
+      print("Expression " + arg + " could not be parsed");
+    } else {
+      print(arg + " -> " + sport_grade);
+      climb_count = climb_count + 1;
+      accum = accum + sport_grade;
+    }
+  }
+
+  average = accum / climb_count;
+  str_average_rating = UIAAFromSportGrade(average);
+  print("UIAA average rating -> " + str_average_rating);
+  print("Average sport grade -> " + average);
+  print("Total effort        -> " + accum);
+}
+
+Main();