Yamo Gebrewold Yamo93
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| function subscribe(eventName, callback) { | |
| if (!Array.isArray(subscribers[eventName])) { | |
| subscribers[eventName] = []; | |
| } | |
| subscribers[eventName].push(callback); | |
| } |
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| function publish(eventName, data) { | |
| if (!Array.isArray(subscribers[eventName])) { | |
| return; | |
| } | |
| subscribers[eventName].forEach(callback => { | |
| if (typeof callback === 'function') { | |
| callback(data); | |
| } | |
| }) | |
| } |
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| function publishSubscribe() { | |
| const subscribers = {}; | |
| function subscribe(eventName, callback) { | |
| if (!Array.isArray(subscribers[eventName])) { | |
| subscribers[eventName] = []; | |
| } | |
| subscribers[eventName].push(callback); | |
| } | |
| function publish(eventName, data) { | |
| if (!Array.isArray(subscribers[eventName])) { |
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| function unsubscribe(eventName) { | |
| delete subscribers[eventName]; | |
| } |
Yamo93
/ extended_subscribe.js
Created
October 31, 2020 21:53
Extended subscribe with unsubscribe return value
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| function subscribe(eventName, callback) { | |
| if (!Array.isArray(subscribers[eventName])) { | |
| subscribers[eventName] = [] | |
| } | |
| subscribers[eventName].push(callback); | |
| const index = subscribers[eventName].length - 1; | |
| return () => { | |
| subscribers[eventName].splice(index, 1); | |
| } | |
| } |
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| const subscribers = { | |
| onUserUpdate: [callbackFunction, anotherCallbackFunction], | |
| onUserLogin: [callbackFunction, anotherCallbackFunction] | |
| }; |
Yamo93
/ violatingopenclosed.js
Created
November 17, 2020 06:48
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| function initializeDatabase(database) { | |
| switch (database.type) { | |
| case 'mysql': | |
| database.connectToMySql(); | |
| break; | |
| case 'postgres': | |
| database.connectToPostgres(); | |
| break; | |
| case 'mongodb': | |
| database.connectToMongoDb(); |
Yamo93
/ applyingopenclosed.js
Created
November 17, 2020 06:57
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| function initializeDatabase(database) { | |
| if (typeof database.init !== 'function') { | |
| throw 'Engine has no init method'; | |
| } | |
| database.init(); | |
| } | |
| const mySqlEngine = { | |
| type: 'mysql', |
Yamo93
/ test_case_slow_bryntum_grid.js
Created
April 19, 2021 12:23
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| import { Grid, DataGenerator } from '../../build/grid.module.js?449264'; | |
| import shared from '../_shared/shared.module.js?449264'; | |
| const grid = new Grid({ | |
| appendTo: 'container', | |
| autoHeight: true, | |
| callOnFunctions: true, | |
| className: '', | |
| columns: [ | |
| { |
Yamo93
/ answer_generator.js
Last active
June 23, 2022 21:58
A class which can generate all possible combinations for a question with x true/false statements. For example, a question with 5 true/false statements can have 2^5 (32) possible combinations.
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| class AnswerGenerator { | |
| combinations = []; | |
| combinationNumber = -1; | |
| generateCombinations(numOfStatements = 5) { | |
| const combinations = []; | |
| const numOfPossibleCombinations = 2 ** numOfStatements; | |
| for (let i = 0; i < numOfPossibleCombinations; i++) { | |
| // for every number, convert it to binary | |
| const binary = i.toString(2); // 16 => 10000 |
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