export Arithmetic funcs individually. Use existing Delim

src/core/lib/Arithmetic.mjs

@@ -8,29 +8,15 @@
 import Utils from "../Utils";
 import BigNumber from "bignumber.js";
 
-/**
- * Arithmetic functions used by Sum, Multiply, Divide, Subtract (etc)
- * functions.
- */
-class Arithmetic {
-
-    /**
-     * @constant
-     * @default
-     */
-    static get DELIM_OPTIONS() {
-        return ["Line feed", "Space", "Comma", "Semi-colon", "Colon", "CRLF"];
-    }
 
 /**
  * Converts a string array to a number array.
  *
-     * @private
  * @param {string[]} input
  * @param {string} delim
  * @returns {BigNumber[]}
  */
-    static _createNumArray(input, delim) {
+export function createNumArray(input, delim) {
     delim = Utils.charRep(delim || "Space");
     const splitNumbers = input.split(delim);
     const numbers = [];
@@ -53,11 +39,10 @@ class Arithmetic {
 /**
  * Adds an array of numbers and returns the value.
  *
-     * @private
  * @param {BigNumber[]} data
  * @returns {BigNumber}
  */
-    static _sum(data) {
+export function sum(data) {
     if (data.length > 0) {
         return data.reduce((acc, curr) => acc.plus(curr));
     }
@@ -67,11 +52,10 @@ class Arithmetic {
 /**
  * Subtracts an array of numbers and returns the value.
  *
-     * @private
  * @param {BigNumber[]} data
  * @returns {BigNumber}
  */
-    static _sub(data) {
+export function sub(data) {
     if (data.length > 0) {
         return data.reduce((acc, curr) => acc.minus(curr));
     }
@@ -81,11 +65,10 @@ class Arithmetic {
 /**
  * Multiplies an array of numbers and returns the value.
  *
-     * @private
  * @param {BigNumber[]} data
  * @returns {BigNumber}
  */
-    static _multi(data) {
+export function multi(data) {
     if (data.length > 0) {
         return data.reduce((acc, curr) => acc.times(curr));
     }
@@ -95,11 +78,10 @@ class Arithmetic {
 /**
  * Divides an array of numbers and returns the value.
  *
-     * @private
  * @param {BigNumber[]} data
  * @returns {BigNumber}
  */
-    static _div(data) {
+export function div(data) {
     if (data.length > 0) {
         return data.reduce((acc, curr) => acc.div(curr));
     }
@@ -109,13 +91,12 @@ class Arithmetic {
 /**
  * Computes mean of a number array and returns the value.
  *
-     * @private
  * @param {BigNumber[]} data
  * @returns {BigNumber}
  */
-    static _mean(data) {
+export function mean(data) {
     if (data.length > 0) {
-            return Arithmetic._sum(data).div(data.length);
+        return sum(data).div(data.length);
     }
 }
 
@@ -123,18 +104,17 @@ class Arithmetic {
 /**
  * Computes median of a number array and returns the value.
  *
-     * @private
  * @param {BigNumber[]} data
  * @returns {BigNumber}
  */
-    static _median(data) {
+export function median(data) {
     if ((data.length % 2) === 0 && data.length > 0) {
         data.sort(function(a, b){
             return a.minus(b);
         });
         const first = data[Math.floor(data.length / 2)];
         const second = data[Math.floor(data.length / 2) - 1];
-            return Arithmetic._mean([first, second]);
+        return mean([first, second]);
     } else {
         return data[Math.floor(data.length / 2)];
     }
@@ -144,13 +124,12 @@ class Arithmetic {
 /**
  * Computes standard deviation of a number array and returns the value.
  *
-     * @private
  * @param {BigNumber[]} data
  * @returns {BigNumber}
  */
-    static _stdDev(data) {
+export function stdDev(data) {
     if (data.length > 0) {
-            const avg = Arithmetic._mean(data);
+        const avg = mean(data);
         let devSum = new BigNumber(0);
         data.map((datum) => {
             devSum = devSum.plus(datum.minus(avg).pow(2));
@@ -158,6 +137,3 @@ class Arithmetic {
         return devSum.div(data.length).sqrt();
     }
 }
-}
-
-export default Arithmetic;

src/core/operations/Divide.mjs

@@ -5,9 +5,11 @@
  * @license Apache-2.0
  */
 
-import Operation from "../Operation";
-import Arithmetic from "../lib/Arithmetic";
 import BigNumber from "bignumber.js";
+import Operation from "../Operation";
+import { div, createNumArray } from "../lib/Arithmetic";
+import { DELIM_OPTIONS } from "../lib/Delim";
+
 
 /**
  * Divide operation
@@ -29,7 +31,7 @@ class Divide extends Operation {
             {
                 "name": "Delimiter",
                 "type": "option",
-                "value": Arithmetic.DELIM_OPTIONS,
+                "value": DELIM_OPTIONS,
             }
         ];
     }
@@ -40,7 +42,7 @@ class Divide extends Operation {
      * @returns {BigNumber}
      */
     run(input, args) {
-        const val = Arithmetic._div(Arithmetic._createNumArray(input, args[0]));
+        const val = div(createNumArray(input, args[0]));
         return val instanceof BigNumber ? val : new BigNumber(NaN);
     }
 

src/core/operations/Mean.mjs

@@ -6,7 +6,8 @@
  */
 
 import Operation from "../Operation";
-import Arithmetic from "../lib/Arithmetic";
+import { mean, createNumArray } from "../lib/Arithmetic";
+import { DELIM_OPTIONS } from "../lib/Delim";
 import BigNumber from "bignumber.js";
 
 /**
@@ -29,7 +30,7 @@ class Mean extends Operation {
             {
                 "name": "Delimiter",
                 "type": "option",
-                "value": Arithmetic.DELIM_OPTIONS,
+                "value": DELIM_OPTIONS,
             }
         ];
     }
@@ -40,7 +41,7 @@ class Mean extends Operation {
      * @returns {BigNumber}
      */
     run(input, args) {
-        const val = Arithmetic._mean(Arithmetic._createNumArray(input, args[0]));
+        const val = mean(createNumArray(input, args[0]));
         return val instanceof BigNumber ? val : new BigNumber(NaN);
     }
 

src/core/operations/Median.mjs

@@ -5,9 +5,10 @@
  * @license Apache-2.0
  */
 
-import Operation from "../Operation";
-import Arithmetic from "../lib/Arithmetic";
 import BigNumber from "bignumber.js";
+import Operation from "../Operation";
+import { median, createNumArray } from "../lib/Arithmetic";
+import { DELIM_OPTIONS } from "../lib/Delim";
 
 /**
  * Median operation
@@ -29,7 +30,7 @@ class Median extends Operation {
             {
                 "name": "Delimiter",
                 "type": "option",
-                "value": Arithmetic.DELIM_OPTIONS,
+                "value": DELIM_OPTIONS,
             }
         ];
     }
@@ -40,7 +41,7 @@ class Median extends Operation {
      * @returns {BigNumber}
      */
     run(input, args) {
-        const val = Arithmetic._median(Arithmetic._createNumArray(input, args[0]));
+        const val = median(createNumArray(input, args[0]));
         return val instanceof BigNumber ? val : new BigNumber(NaN);
     }
 

src/core/operations/Multiply.mjs

@@ -5,9 +5,11 @@
  * @license Apache-2.0
  */
 
-import Operation from "../Operation";
-import Arithmetic from "../lib/Arithmetic";
 import BigNumber from "bignumber.js";
+import Operation from "../Operation";
+import { multi, createNumArray } from "../lib/Arithmetic";
+import { DELIM_OPTIONS } from "../lib/Delim";
+
 
 /**
  * Multiply operation
@@ -29,7 +31,7 @@ class Multiply extends Operation {
             {
                 "name": "Delimiter",
                 "type": "option",
-                "value": Arithmetic.DELIM_OPTIONS,
+                "value": DELIM_OPTIONS,
             }
         ];
     }
@@ -40,7 +42,7 @@ class Multiply extends Operation {
      * @returns {BigNumber}
      */
     run(input, args) {
-        const val = Arithmetic._multi(Arithmetic._createNumArray(input, args[0]));
+        const val = multi(createNumArray(input, args[0]));
         return val instanceof BigNumber ? val : new BigNumber(NaN);
     }
 

src/core/operations/StandardDeviation.mjs

@@ -5,9 +5,11 @@
  * @license Apache-2.0
  */
 
-import Operation from "../Operation";
-import Arithmetic from "../lib/Arithmetic";
 import BigNumber from "bignumber.js";
+import Operation from "../Operation";
+import { stdDev, createNumArray } from "../lib/Arithmetic";
+import { DELIM_OPTIONS } from "../lib/Delim";
+
 
 /**
  * Standard Deviation operation
@@ -29,7 +31,7 @@ class StandardDeviation extends Operation {
             {
                 "name": "Delimiter",
                 "type": "option",
-                "value": Arithmetic.DELIM_OPTIONS,
+                "value": DELIM_OPTIONS,
             }
         ];
     }
@@ -40,7 +42,7 @@ class StandardDeviation extends Operation {
      * @returns {BigNumber}
      */
     run(input, args) {
-        const val = Arithmetic._stdDev(Arithmetic._createNumArray(input, args[0]));
+        const val = stdDev(createNumArray(input, args[0]));
         return val instanceof BigNumber ? val : new BigNumber(NaN);
 
     }

src/core/operations/Subtract.mjs

@@ -5,9 +5,11 @@
  * @license Apache-2.0
  */
 
-import Operation from "../Operation";
-import Arithmetic from "../lib/Arithmetic";
 import BigNumber from "bignumber.js";
+import Operation from "../Operation";
+import { sub, createNumArray } from "../lib/Arithmetic";
+import { DELIM_OPTIONS } from "../lib/Delim";
+
 
 /**
  * Subtract operation
@@ -29,7 +31,7 @@ class Subtract extends Operation {
             {
                 "name": "Delimiter",
                 "type": "option",
-                "value": Arithmetic.DELIM_OPTIONS,
+                "value": DELIM_OPTIONS,
             }
         ];
     }
@@ -40,7 +42,7 @@ class Subtract extends Operation {
      * @returns {BigNumber}
      */
     run(input, args) {
-        const val = Arithmetic._sub(Arithmetic._createNumArray(input, args[0]));
+        const val = sub(createNumArray(input, args[0]));
         return val instanceof BigNumber ? val : new BigNumber(NaN);
     }
 

src/core/operations/Sum.mjs

@@ -4,9 +4,11 @@
  * @license Apache-2.0
  */
 
-import Operation from "../Operation";
-import Arithmetic from "../lib/Arithmetic";
 import BigNumber from "bignumber.js";
+import Operation from "../Operation";
+import { sum, createNumArray } from "../lib/Arithmetic";
+import { DELIM_OPTIONS } from "../lib/Delim";
+
 
 /**
  * Sum operation
@@ -28,7 +30,7 @@ class Sum extends Operation {
             {
                 "name": "Delimiter",
                 "type": "option",
-                "value": Arithmetic.DELIM_OPTIONS,
+                "value": DELIM_OPTIONS,
             }
         ];
     }
@@ -39,7 +41,7 @@ class Sum extends Operation {
      * @returns {BigNumber}
      */
     run(input, args) {
-        const val = Arithmetic._sum(Arithmetic._createNumArray(input, args[0]));
+        const val = sum(createNumArray(input, args[0]));
         return val instanceof BigNumber ? val : new BigNumber(NaN);
     }