Merge branch 'port-arithmetic' of https://github.com/d98762625/CyberChef into esm

src/core/lib/Arithmetic.mjs

@@ -0,0 +1,139 @@
+/**
+ * @author bwhitn [brian.m.whitney@outlook.com]
+ * @author d98762625 [d98762625@gmailcom]
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+import Utils from "../Utils";
+import BigNumber from "bignumber.js";
+
+
+/**
+ * Converts a string array to a number array.
+ *
+ * @param {string[]} input
+ * @param {string} delim
+ * @returns {BigNumber[]}
+ */
+export function createNumArray(input, delim) {
+    delim = Utils.charRep(delim || "Space");
+    const splitNumbers = input.split(delim);
+    const numbers = [];
+    let num;
+
+    splitNumbers.map((number) => {
+        try {
+            num = BigNumber(number.trim());
+            if (!num.isNaN()) {
+                numbers.push(num);
+            }
+        } catch (err) {
+            // This line is not a valid number
+        }
+    });
+    return numbers;
+}
+
+
+/**
+ * Adds an array of numbers and returns the value.
+ *
+ * @param {BigNumber[]} data
+ * @returns {BigNumber}
+ */
+export function sum(data) {
+    if (data.length > 0) {
+        return data.reduce((acc, curr) => acc.plus(curr));
+    }
+}
+
+
+/**
+ * Subtracts an array of numbers and returns the value.
+ *
+ * @param {BigNumber[]} data
+ * @returns {BigNumber}
+ */
+export function sub(data) {
+    if (data.length > 0) {
+        return data.reduce((acc, curr) => acc.minus(curr));
+    }
+}
+
+
+/**
+ * Multiplies an array of numbers and returns the value.
+ *
+ * @param {BigNumber[]} data
+ * @returns {BigNumber}
+ */
+export function multi(data) {
+    if (data.length > 0) {
+        return data.reduce((acc, curr) => acc.times(curr));
+    }
+}
+
+
+/**
+ * Divides an array of numbers and returns the value.
+ *
+ * @param {BigNumber[]} data
+ * @returns {BigNumber}
+ */
+export function div(data) {
+    if (data.length > 0) {
+        return data.reduce((acc, curr) => acc.div(curr));
+    }
+}
+
+
+/**
+ * Computes mean of a number array and returns the value.
+ *
+ * @param {BigNumber[]} data
+ * @returns {BigNumber}
+ */
+export function mean(data) {
+    if (data.length > 0) {
+        return sum(data).div(data.length);
+    }
+}
+
+
+/**
+ * Computes median of a number array and returns the value.
+ *
+ * @param {BigNumber[]} data
+ * @returns {BigNumber}
+ */
+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 mean([first, second]);
+    } else {
+        return data[Math.floor(data.length / 2)];
+    }
+}
+
+
+/**
+ * Computes standard deviation of a number array and returns the value.
+ *
+ * @param {BigNumber[]} data
+ * @returns {BigNumber}
+ */
+export function stdDev(data) {
+    if (data.length > 0) {
+        const avg = mean(data);
+        let devSum = new BigNumber(0);
+        data.map((datum) => {
+            devSum = devSum.plus(datum.minus(avg).pow(2));
+        });
+        return devSum.div(data.length).sqrt();
+    }
+}

src/core/lib/Delim.mjs

@@ -31,6 +31,11 @@ export const WORD_DELIM_OPTIONS = ["Line feed", "CRLF", "Forward slash", "Backsl
  */
 export const INPUT_DELIM_OPTIONS = ["Line feed", "CRLF", "Space", "Comma", "Semi-colon", "Colon", "Nothing (separate chars)"];
 
+/**
+ * Arithmetic sequence delimiters
+ */
+export const ARITHMETIC_DELIM_OPTIONS = ["Line feed", "Space", "Comma", "Semi-colon", "Colon", "CRLF"];
+
 /**
  * Split delimiters.
  */