[New] Added new math functions: round10() floor10() and ceil10()

bower.json

@@ -1,7 +1,7 @@
 {
   "name": "strolch-wc-util-behavior",
   "description": "Strolch Polymer Util Behaviors",
-  "version": "0.3.3",
+  "version": "0.3.4",
   "authors": [
     "Robert von Burg"
   ],

strolch-wc-util-behavior.html

@@ -195,6 +195,46 @@
             return Math.round(value * 1000) / 1000;
         },
 
+        /**
+         * Decimal adjustment of a number.
+         *
+         * @param {String}  type  The type of adjustment.
+         * @param {Number}  value The number.
+         * @param {Integer} exp   The exponent (the 10 logarithm of the adjustment base).
+         * @returns {Number} The adjusted value.
+         */
+        _decimalAdjust: function (type, value, exp) {
+            // If the exp is undefined or zero...
+            if (typeof exp === 'undefined' || +exp === 0) {
+                return Math[type](value);
+            }
+            value = +value;
+            exp = +exp;
+            // If the value is not a number or the exp is not an integer...
+            if (isNaN(value) || !(typeof exp === 'number' && exp % 1 === 0)) {
+                return NaN;
+            }
+            // Shift
+            value = value.toString().split('e');
+            value = Math[type](+(value[0] + 'e' + (value[1] ? (+value[1] - exp) : -exp)));
+            // Shift back
+            value = value.toString().split('e');
+            return +(value[0] + 'e' + (value[1] ? (+value[1] + exp) : exp));
+        },
+
+        // Decimal round
+        round10: function (value, exp) {
+            return this._decimalAdjust('round', value, exp);
+        },
+        // Decimal floor
+        floor10: function (value, exp) {
+            return this._decimalAdjust('floor', value, exp);
+        },
+        // Decimal ceil
+        ceil10: function (value, exp) {
+            return this._decimalAdjust('ceil', value, exp);
+        },
+
         //
         // i18n functions
         //