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Added Magic operation with the ability to detect language, file type and some encoding types.
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n1474335
parent
aa6890432c
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fc2828fee3
@ -1,2 +1,3 @@
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src/core/lib/**
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!src/core/lib/Magic.js
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src/core/config/MetaConfig.js
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@ -1,5 +1,6 @@
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import Recipe from "./Recipe.js";
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import Dish from "./Dish.js";
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import Magic from "./lib/Magic.js";
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/**
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@ -253,6 +254,29 @@ const FlowControl = {
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},
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/**
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* Magic operation.
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*
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* @param {Object} state - The current state of the recipe.
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* @param {number} state.progress - The current position in the recipe.
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* @param {Dish} state.dish - The Dish being operated on.
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* @param {Operation[]} state.opList - The list of operations in the recipe.
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* @returns {Object} The updated state of the recipe.
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*/
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runMagic: function(state) {
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const dish = state.dish;
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const magic = new Magic(dish.get(Dish.ARRAY_BUFFER));
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const output = JSON.stringify(magic.detectLanguage(), null, 2) + "\n\n" +
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JSON.stringify(magic.detectFileType(), null, 2) + "\n\n" +
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JSON.stringify(magic.findMatchingOps(), null, 2);
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dish.set(output, Dish.STRING);
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return state;
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},
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/**
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* Returns the index of a label.
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*
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@ -329,6 +329,7 @@ const Categories = [
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{
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name: "Flow control",
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ops: [
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"Magic",
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"Fork",
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"Merge",
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"Register",
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@ -81,6 +81,14 @@ import URL_ from "../operations/URL.js";
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* @type {Object.<string, OpConf>}
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*/
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const OperationConfig = {
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"Magic": {
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module: "Default",
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description: "Attempts to detect what the input data is and which operations could help to make more sense of it.",
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inputType: "ArrayBuffer",
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outputType: "string",
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flowControl: true,
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args: []
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},
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"Fork": {
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module: "Default",
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description: "Split the input data up based on the specified delimiter and run all subsequent operations on each branch separately.<br><br>For example, to decode multiple Base64 strings, enter them all on separate lines then add the 'Fork' and 'From Base64' operations to the recipe. Each string will be decoded separately.",
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@ -239,6 +247,13 @@ const OperationConfig = {
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type: "boolean",
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value: Base64.REMOVE_NON_ALPH_CHARS
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}
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],
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patterns: [
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{
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match: "^(?:[A-Z\\d+/]{4})+(?:[A-Z\\d+/]{2}==|[A-Z\\d+/]{3}=)?$",
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flags: "i",
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args: ["A-Za-z0-9+/=", false]
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}
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]
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},
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"To Base64": {
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@ -625,6 +640,53 @@ const OperationConfig = {
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type: "option",
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value: ByteRepr.HEX_DELIM_OPTIONS
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}
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],
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patterns: [
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{
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match: "^(?:[\\dA-F]{2})+$",
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flags: "i",
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args: ["None"]
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},
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{
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match: "^[\\dA-F]{2}(?: [\\dA-F]{2})*$",
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flags: "i",
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args: ["Space"]
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},
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{
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match: "^[\\dA-F]{2}(?:,[\\dA-F]{2})*$",
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flags: "i",
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args: ["Comma"]
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},
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{
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match: "^[\\dA-F]{2}(?:;[\\dA-F]{2})*$",
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flags: "i",
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args: ["Semi-colon"]
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},
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{
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match: "^[\\dA-F]{2}(?::[\\dA-F]{2})*$",
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flags: "i",
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args: ["Colon"]
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},
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{
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match: "^[\\dA-F]{2}(?:\\n[\\dA-F]{2})*$",
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flags: "i",
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args: ["Line feed"]
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},
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{
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match: "^[\\dA-F]{2}(?:\\r\\n[\\dA-F]{2})*$",
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flags: "i",
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args: ["CRLF"]
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},
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{
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match: "^[\\dA-F]{2}(?:0x[\\dA-F]{2})*$",
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flags: "i",
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args: ["0x"]
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},
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{
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match: "^[\\dA-F]{2}(?:\\\\x[\\dA-F]{2})*$",
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flags: "i",
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args: ["\\x"]
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}
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]
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},
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"To Hex": {
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@ -140,6 +140,7 @@ OpModules.Default = {
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"Numberwang": Numberwang.run,
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"Generate TOTP": OTP.runTOTP,
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"Generate HOTP": OTP.runHOTP,
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"Magic": FlowControl.runMagic,
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"Fork": FlowControl.runFork,
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"Merge": FlowControl.runMerge,
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"Register": FlowControl.runRegister,
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182
src/core/lib/Magic.js
Normal file
182
src/core/lib/Magic.js
Normal file
@ -0,0 +1,182 @@
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import OperationConfig from "../config/MetaConfig.js";
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import Utils from "../Utils.js";
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import FileType from "../operations/FileType.js";
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/**
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* A class for detecting encodings, file types and byte frequencies.
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2018
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* @license Apache-2.0
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*
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* @class
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*/
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class Magic {
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/**
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* Magic constructor.
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*
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* @param {ArrayBuffer} buf
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*/
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constructor(buf) {
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this.inputBuffer = new Uint8Array(buf);
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this.inputStr = Utils.arrayBufferToStr(buf);
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// Match against known encodings
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// findMatchingOps
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// Match against known file types
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// detectFileType
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// Match against byte frequencies
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// detectLanguage
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// Report info to user
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// Offer to run various recipes based on findings
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}
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/**
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* Generates a list of all patterns that operations claim to be able to decode.
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*
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* @static
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* @returns {Object[]}
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*/
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static generateOpPatterns() {
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let opPatterns = [];
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for (let op in OperationConfig) {
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if (!OperationConfig[op].hasOwnProperty("patterns")) continue;
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OperationConfig[op].patterns.forEach(pattern => {
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opPatterns.push({
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op: op,
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match: pattern.match,
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flags: pattern.flags,
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args: pattern.args
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});
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});
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}
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return opPatterns;
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}
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/**
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* Finds operations that claim to be able to decode the input based on regular
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* expression matches.
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*
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* @returns {Object[]}
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*/
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findMatchingOps() {
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const opPatterns = Magic.generateOpPatterns();
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let matches = [];
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for (let i = 0; i < opPatterns.length; i++) {
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let pattern = opPatterns[i];
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const regex = new RegExp(pattern.match, pattern.flags);
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if (regex.test(this.inputStr)) {
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matches.push(pattern);
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}
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}
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return matches;
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}
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/**
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* Attempts to detect the language of the input by comparing its byte frequency
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* to that of several known languages.
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*
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* @returns {Object[]}
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*/
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detectLanguage() {
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/**
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* Byte frequencies of various languages generated from Wikipedia dumps taken in late 2017.
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* The Chi-Squared test cannot accept expected values of 0, so 0.0001 has been used to account
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* for bytes that do not normally appear in the language.
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*/
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const langFreqs = {
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"ar": [0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.65, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 9.194, 0.002, 0.102, 0.0001, 0.0001, 0.007, 0.001, 0.002, 0.109, 0.108, 0.002, 0.001, 0.03, 0.046, 0.42, 0.018, 0.182, 0.202, 0.135, 0.063, 0.065, 0.061, 0.055, 0.053, 0.062, 0.113, 0.054, 0.001, 0.002, 0.003, 0.002, 0.0001, 0.0001, 0.01, 0.006, 0.009, 0.007, 0.005, 0.004, 0.004, 0.004, 0.005, 0.002, 0.002, 0.005, 0.007, 0.005, 0.004, 0.007, 0.001, 0.005, 0.009, 0.006, 0.002, 0.002, 0.002, 0.001, 0.001, 0.001, 0.007, 0.001, 0.007, 0.0001, 0.004, 0.0001, 0.052, 0.008, 0.019, 0.018, 0.055, 0.008, 0.011, 0.016, 0.045, 0.001, 0.006, 0.028, 0.016, 0.037, 0.04, 0.012, 0.001, 0.038, 0.03, 0.035, 0.02, 0.006, 0.006, 0.002, 0.009, 0.002, 0.0001, 0.001, 0.0001, 0.0001, 0.0001, 0.055, 1.131, 0.874, 0.939, 4.804, 2.787, 2.235, 1.018, 2.407, 0.349, 3.542, 0.092, 0.4, 0.007, 0.051, 0.053, 0.022, 0.061, 0.01, 0.008, 0.001, 0.001, 0.0001, 0.001, 0.001, 0.001, 0.0001, 0.008, 0.001, 0.001, 0.0001, 0.002, 0.013, 0.133, 0.049, 0.782, 0.037, 0.335, 0.157, 6.208, 1.599, 1.486, 1.889, 0.276, 0.607, 0.762, 0.341, 1.38, 0.239, 2.041, 0.293, 1.149, 0.411, 0.383, 0.246, 0.406, 0.094, 1.401, 0.223, 0.006, 0.001, 0.001, 0.001, 0.001, 0.0001, 0.0001, 0.027, 0.003, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.003, 0.001, 0.003, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.002, 23.298, 20.414, 0.003, 0.004, 0.0001, 0.0001, 0.0001, 0.0001, 0.001, 0.0001, 0.019, 0.001, 0.0001, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001],
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"de": [0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.726, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 13.303, 0.002, 0.278, 0.0001, 0.0001, 0.007, 0.003, 0.005, 0.149, 0.149, 0.015, 0.001, 0.636, 0.237, 0.922, 0.023, 0.305, 0.472, 0.225, 0.115, 0.11, 0.121, 0.108, 0.11, 0.145, 0.271, 0.049, 0.022, 0.002, 0.002, 0.002, 0.001, 0.0001, 0.413, 0.383, 0.144, 0.412, 0.275, 0.258, 0.273, 0.218, 0.18, 0.167, 0.277, 0.201, 0.328, 0.179, 0.111, 0.254, 0.012, 0.219, 0.602, 0.209, 0.1, 0.185, 0.206, 0.005, 0.01, 0.112, 0.002, 0.0001, 0.002, 0.0001, 0.006, 0.0001, 4.417, 1.306, 1.99, 3.615, 12.382, 1.106, 2.0, 2.958, 6.179, 0.082, 0.866, 2.842, 1.869, 7.338, 2.27, 0.606, 0.016, 6.056, 4.424, 4.731, 3.002, 0.609, 0.918, 0.053, 0.169, 0.824, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.147, 0.002, 0.003, 0.001, 0.006, 0.001, 0.001, 0.002, 0.001, 0.001, 0.0001, 0.0001, 0.001, 0.004, 0.0001, 0.0001, 0.0001, 0.0001, 0.001, 0.03, 0.0001, 0.0001, 0.009, 0.001, 0.002, 0.009, 0.002, 0.001, 0.061, 0.0001, 0.048, 0.122, 0.057, 0.009, 0.001, 0.001, 0.4, 0.001, 0.002, 0.003, 0.003, 0.017, 0.001, 0.003, 0.001, 0.005, 0.0001, 0.001, 0.003, 0.002, 0.003, 0.005, 0.001, 0.001, 0.203, 0.0001, 0.002, 0.001, 0.002, 0.002, 0.438, 0.002, 0.002, 0.001, 0.0001, 0.0001, 0.056, 1.237, 0.01, 0.013, 0.0001, 0.0001, 0.001, 0.0001, 0.001, 0.0001, 0.0001, 0.0001, 0.003, 0.001, 0.005, 0.002, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.001, 0.148, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001],
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"en": [0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.755, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 15.843, 0.004, 0.375, 0.002, 0.008, 0.019, 0.008, 0.134, 0.137, 0.137, 0.001, 0.001, 0.972, 0.19, 0.857, 0.017, 0.334, 0.421, 0.246, 0.108, 0.104, 0.112, 0.103, 0.1, 0.127, 0.237, 0.04, 0.027, 0.004, 0.003, 0.004, 0.002, 0.0001, 0.338, 0.218, 0.326, 0.163, 0.121, 0.149, 0.133, 0.192, 0.232, 0.107, 0.082, 0.148, 0.248, 0.134, 0.103, 0.195, 0.012, 0.162, 0.368, 0.366, 0.077, 0.061, 0.127, 0.009, 0.03, 0.015, 0.004, 0.0001, 0.004, 0.0001, 0.003, 0.0001, 6.614, 1.039, 2.327, 2.934, 9.162, 1.606, 1.415, 3.503, 5.718, 0.081, 0.461, 3.153, 1.793, 5.723, 5.565, 1.415, 0.066, 5.036, 4.79, 6.284, 1.992, 0.759, 1.176, 0.139, 1.162, 0.102, 0.0001, 0.002, 0.0001, 0.0001, 0.0001, 0.06, 0.004, 0.003, 0.002, 0.001, 0.001, 0.001, 0.002, 0.001, 0.001, 0.0001, 0.001, 0.001, 0.003, 0.0001, 0.0001, 0.001, 0.001, 0.001, 0.031, 0.006, 0.001, 0.001, 0.001, 0.002, 0.014, 0.001, 0.001, 0.005, 0.005, 0.001, 0.002, 0.017, 0.007, 0.002, 0.003, 0.004, 0.002, 0.001, 0.002, 0.002, 0.012, 0.001, 0.002, 0.001, 0.004, 0.001, 0.001, 0.003, 0.003, 0.002, 0.005, 0.001, 0.001, 0.003, 0.001, 0.003, 0.001, 0.002, 0.001, 0.004, 0.001, 0.002, 0.001, 0.0001, 0.0001, 0.02, 0.047, 0.009, 0.009, 0.0001, 0.0001, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.003, 0.001, 0.004, 0.002, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.001, 0.001, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.005, 0.002, 0.061, 0.001, 0.0001, 0.002, 0.001, 0.001, 0.001, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001],
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"es": [0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.757, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 15.771, 0.003, 0.315, 0.001, 0.004, 0.019, 0.003, 0.014, 0.132, 0.133, 0.001, 0.001, 0.976, 0.078, 0.703, 0.014, 0.268, 0.331, 0.197, 0.095, 0.086, 0.095, 0.085, 0.084, 0.105, 0.183, 0.053, 0.027, 0.001, 0.002, 0.002, 0.002, 0.0001, 0.242, 0.129, 0.28, 0.129, 0.322, 0.105, 0.099, 0.077, 0.116, 0.074, 0.034, 0.209, 0.196, 0.086, 0.059, 0.187, 0.009, 0.118, 0.247, 0.128, 0.061, 0.072, 0.033, 0.023, 0.018, 0.013, 0.005, 0.0001, 0.005, 0.0001, 0.003, 0.0001, 8.9, 0.939, 3.234, 4.015, 9.642, 0.603, 0.891, 0.531, 5.007, 0.262, 0.107, 4.355, 1.915, 5.487, 6.224, 1.805, 0.423, 4.992, 5.086, 3.402, 2.878, 0.667, 0.044, 0.125, 0.673, 0.299, 0.0001, 0.001, 0.0001, 0.0001, 0.0001, 0.033, 0.009, 0.002, 0.002, 0.001, 0.001, 0.001, 0.001, 0.001, 0.003, 0.0001, 0.001, 0.001, 0.003, 0.0001, 0.0001, 0.001, 0.001, 0.001, 0.006, 0.006, 0.001, 0.0001, 0.001, 0.001, 0.003, 0.001, 0.001, 0.008, 0.008, 0.001, 0.001, 0.025, 0.274, 0.002, 0.002, 0.002, 0.001, 0.001, 0.002, 0.002, 0.221, 0.003, 0.019, 0.001, 0.373, 0.001, 0.001, 0.005, 0.144, 0.01, 0.631, 0.002, 0.001, 0.002, 0.001, 0.002, 0.001, 0.102, 0.018, 0.006, 0.002, 0.002, 0.002, 0.0001, 0.0001, 0.079, 1.766, 0.003, 0.005, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.005, 0.002, 0.008, 0.003, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.001, 0.002, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.002, 0.001, 0.032, 0.001, 0.0001, 0.001, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001],
|
||||
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|
||||
"zh": [0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 1.074, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.273, 0.003, 0.045, 0.0001, 0.001, 0.012, 0.001, 0.004, 0.032, 0.032, 0.001, 0.003, 0.032, 0.068, 0.063, 0.017, 0.386, 0.478, 0.308, 0.149, 0.134, 0.146, 0.127, 0.121, 0.136, 0.231, 0.018, 0.009, 0.007, 0.006, 0.007, 0.0001, 0.0001, 0.045, 0.029, 0.041, 0.028, 0.022, 0.017, 0.02, 0.019, 0.025, 0.01, 0.013, 0.02, 0.033, 0.021, 0.018, 0.028, 0.002, 0.022, 0.045, 0.031, 0.01, 0.013, 0.012, 0.007, 0.005, 0.003, 0.004, 0.0001, 0.004, 0.0001, 0.009, 0.0001, 0.159, 0.026, 0.051, 0.047, 0.17, 0.025, 0.032, 0.057, 0.124, 0.003, 0.021, 0.089, 0.049, 0.12, 0.129, 0.028, 0.002, 0.124, 0.083, 0.1, 0.058, 0.016, 0.016, 0.008, 0.03, 0.012, 0.006, 0.004, 0.006, 0.001, 0.0001, 2.707, 1.09, 1.398, 0.705, 1.23, 1.04, 0.715, 0.952, 1.455, 1.297, 0.845, 1.19, 2.403, 1.193, 0.813, 1.077, 0.889, 0.565, 0.387, 0.47, 0.931, 0.663, 1.035, 0.837, 0.77, 0.772, 1.434, 1.023, 1.668, 0.609, 0.437, 0.793, 0.535, 0.706, 0.48, 0.538, 0.785, 0.909, 0.7, 0.697, 1.017, 0.519, 0.441, 0.567, 0.626, 1.082, 0.814, 1.054, 1.074, 0.811, 0.556, 0.684, 0.903, 0.43, 0.642, 0.78, 2.083, 1.147, 2.006, 1.331, 2.547, 1.015, 0.911, 0.807, 0.0001, 0.0001, 0.069, 0.007, 0.001, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.003, 0.001, 0.005, 0.002, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.001, 0.001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.002, 0.001, 0.126, 1.369, 3.539, 8.968, 5.44, 4.358, 3.141, 2.48, 0.0001, 0.001, 0.001, 0.0001, 0.0001, 1.821, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001, 0.0001],
|
||||
};
|
||||
|
||||
const inputFreq = this._freqDist();
|
||||
let chiSqrs = [];
|
||||
|
||||
for (let lang in langFreqs) {
|
||||
chiSqrs.push({
|
||||
lang: lang,
|
||||
chiSqr: this._chiSqr(inputFreq, langFreqs[lang])
|
||||
});
|
||||
}
|
||||
|
||||
chiSqrs.sort((a, b) => {
|
||||
return a.chiSqr - b.chiSqr;
|
||||
});
|
||||
|
||||
return chiSqrs;
|
||||
}
|
||||
|
||||
/**
|
||||
* Detects any matching file types for the input.
|
||||
*
|
||||
* @returns {Object} type
|
||||
* @returns {string} type.ext - File extension
|
||||
* @returns {string} type.mime - Mime type
|
||||
* @returns {string} [type.desc] - Description
|
||||
*/
|
||||
detectFileType() {
|
||||
return FileType.magicType(this.inputBuffer);
|
||||
}
|
||||
|
||||
/**
|
||||
* Calculates the number of times each byte appears in the input
|
||||
*
|
||||
* @private
|
||||
* @returns {number[]}
|
||||
*/
|
||||
_freqDist() {
|
||||
const len = this.inputBuffer.length;
|
||||
let i = len,
|
||||
counts = new Array(256).fill(0);
|
||||
|
||||
if (!len) return counts;
|
||||
|
||||
while (i--) {
|
||||
counts[this.inputBuffer[i]]++;
|
||||
}
|
||||
|
||||
return counts.map(c => {
|
||||
return c / len * 100;
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Calculates Pearson's Chi-Squared test for two frequency arrays.
|
||||
* https://en.wikipedia.org/wiki/Pearson%27s_chi-squared_test
|
||||
*
|
||||
* @private
|
||||
* @param {number[]} observed
|
||||
* @param {number[]} expected
|
||||
* @returns {number}
|
||||
*/
|
||||
_chiSqr(observed, expected) {
|
||||
let tmp,
|
||||
res = 0;
|
||||
|
||||
for (let i = 0; i < observed.length; i++) {
|
||||
tmp = observed[i] - expected[i];
|
||||
res += tmp * tmp / expected[i];
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
export default Magic;
|
||||
@ -34,7 +34,8 @@ function main() {
|
||||
"URL Decode",
|
||||
"Regular expression",
|
||||
"Entropy",
|
||||
"Fork"
|
||||
"Fork",
|
||||
"Magic"
|
||||
];
|
||||
|
||||
const defaultOptions = {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user