├── .gitignore ├── README.md ├── async.ts ├── callback.png ├── callback.ts ├── concurrency.png ├── function.ts ├── package.json ├── promise.png ├── promise.ts ├── slide-example1.ts ├── slide-example2.ts ├── sync.ts └── tsconfig.json /.gitignore: -------------------------------------------------------------------------------- 1 | *.js -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # concurrency-javascript-foundation -------------------------------------------------------------------------------- /async.ts: -------------------------------------------------------------------------------- 1 | //CALLBACK 2 | 3 | // function washing(callback: () => void) { 4 | // console.log('Washing started...'); 5 | // setTimeout(() => { 6 | // console.log('washing done!'); 7 | // callback(); 8 | // }, 5000); 9 | // } 10 | 11 | // function soaking(callback: () => void) { 12 | // console.log('Soaking started...'); 13 | // setTimeout(() => { 14 | // console.log('Soaking done!'); 15 | // callback(); 16 | // }, 3000); 17 | // } 18 | 19 | // function drying() { 20 | // console.log('Drying started...'); 21 | // setTimeout(() => { 22 | // console.log('Drying done!'); 23 | // }, 2000); 24 | // } 25 | 26 | // console.log('folding laundry'); 27 | 28 | // washing(() => { 29 | // soaking(() => { 30 | // drying(); 31 | // }); 32 | // }); 33 | 34 | // console.log('I am making biryani'); 35 | 36 | //PROMISE 37 | 38 | function washing() { 39 | console.log('Washing started...'); 40 | return new Promise((resolve, reject) => { 41 | setTimeout(() => { 42 | resolve('washing done!'); 43 | }, 5000); 44 | }); 45 | } 46 | 47 | function soaking() { 48 | console.log('Soaking started...'); 49 | return new Promise((resolve, reject) => { 50 | setTimeout(() => { 51 | resolve('Soaking done!'); 52 | }, 3000); 53 | }); 54 | } 55 | 56 | function drying() { 57 | console.log('Drying started...'); 58 | return new Promise((resolve, reject) => { 59 | setTimeout(() => { 60 | resolve('Drying done!'); 61 | }, 2000); 62 | }); 63 | } 64 | 65 | // THEN CATCH 66 | 67 | // washing() 68 | // .then((value) => { 69 | // console.log(value); 70 | // return soaking(); 71 | // }) 72 | // .then((value) => { 73 | // console.log(value); 74 | // return drying(); 75 | // }) 76 | // .then((value) => { 77 | // console.log(value); 78 | // }) 79 | // .catch((error) => { 80 | // console.log(error); 81 | // }); 82 | 83 | // ASYNC AWAIT 84 | 85 | async function runWashingMachine() { 86 | try { 87 | const result1 = await washing(); 88 | console.log(result1); 89 | const result2 = await soaking(); 90 | console.log(result2); 91 | const result3 = await drying(); 92 | console.log(result3); 93 | } catch (error) { 94 | console.log(error); 95 | } finally { 96 | console.log('I will run anyway!'); 97 | } 98 | } 99 | 100 | console.log('folding laundry'); 101 | 102 | runWashingMachine(); 103 | 104 | console.log('I am making biryani...'); 105 | -------------------------------------------------------------------------------- /callback.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mubashirimtiaz/concurrency-javascript-foundation/0f99504bc2f6d4190785481c4018b846942a4d02/callback.png -------------------------------------------------------------------------------- /callback.ts: -------------------------------------------------------------------------------- 1 | function parentFunction(func: () => void) { 2 | console.log("I'm the parent function"); //1 3 | func(); //childFunction 4 | } 5 | 6 | function childFunction() { 7 | console.log("I'm the child function"); 8 | } 9 | 10 | parentFunction(childFunction); 11 | -------------------------------------------------------------------------------- /concurrency.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mubashirimtiaz/concurrency-javascript-foundation/0f99504bc2f6d4190785481c4018b846942a4d02/concurrency.png -------------------------------------------------------------------------------- /function.ts: -------------------------------------------------------------------------------- 1 | //EXPECT NUMBER 2 | function add(a: number, b: number): number { 3 | return a + b; 4 | } 5 | 6 | //EXPECT STRING 7 | 8 | function greet(name: string): string { 9 | return `Hello ${name}`; 10 | } 11 | 12 | //EXPECT BOOLEAN 13 | function powerOutage(light: boolean): void { 14 | if (light) { 15 | console.log('There is light'); 16 | } else { 17 | console.log('Power outage'); 18 | } 19 | } 20 | 21 | //EXPECT ARRAY 22 | function customFind(arr: string[], element: string): boolean | void { 23 | for (let i = 0; i < arr.length; i++) { 24 | if (arr[i] === element) { 25 | return true; 26 | } 27 | } 28 | } 29 | 30 | //EXPECT OBJECT 31 | function logPersonName(person: TPerson): void { 32 | console.log(person.name); 33 | } 34 | 35 | type TPerson = { 36 | name: string; 37 | age: number; 38 | }; 39 | 40 | const person: TPerson = { 41 | name: 'John', 42 | age: 30, 43 | }; 44 | 45 | logPersonName(person); 46 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "concurrency", 3 | "version": "1.0.0", 4 | "description": "", 5 | "main": "index.js", 6 | "type": "module", 7 | "scripts": { 8 | "test": "echo \"Error: no test specified\" && exit 1" 9 | }, 10 | "keywords": [], 11 | "author": "", 12 | "license": "ISC" 13 | } 14 | -------------------------------------------------------------------------------- /promise.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mubashirimtiaz/concurrency-javascript-foundation/0f99504bc2f6d4190785481c4018b846942a4d02/promise.png -------------------------------------------------------------------------------- /promise.ts: -------------------------------------------------------------------------------- 1 | const returnMoney = new Promise((resolve, reject) => { 2 | setTimeout(() => { 3 | resolve('Success!!'); 4 | }, 3000); 5 | }); 6 | 7 | returnMoney 8 | .then((value) => { 9 | console.log(value); 10 | console.log('Thank you for returning money'); 11 | }) 12 | .catch((value) => { 13 | console.log(value); 14 | console.log("Sorry, I'm unable to return money"); 15 | }) 16 | .finally(() => { 17 | console.log("I'll not give you money again!"); 18 | }); 19 | -------------------------------------------------------------------------------- /slide-example1.ts: -------------------------------------------------------------------------------- 1 | console.log('One'); 2 | 3 | console.log('Two'); 4 | 5 | function logThree() { 6 | console.log('Three'); 7 | } 8 | 9 | function add(a: number, b: number) { 10 | console.log(a + b); 11 | } 12 | 13 | logThree(); 14 | 15 | console.log(add(2, 3)); 16 | 17 | console.log('Four'); 18 | -------------------------------------------------------------------------------- /slide-example2.ts: -------------------------------------------------------------------------------- 1 | console.log('One'); 2 | 3 | setTimeout(() => { 4 | console.log('Inside setTimeout'); 5 | }, 2000); 6 | 7 | console.log('Two'); 8 | -------------------------------------------------------------------------------- /sync.ts: -------------------------------------------------------------------------------- 1 | console.log('Start'); 2 | 3 | let username = 'Mubashir Ali'; 4 | 5 | console.log(username); // 5 6 | 7 | let age = 18; 8 | 9 | if (age < 18) { 10 | console.log('you are not an adult'); 11 | } else { 12 | console.log('you are an adult'); 13 | } 14 | 15 | const bestFriends: string[] = ['Hamza', 'Ali', 'Raza', 'Junaid']; 16 | 17 | for (let i = 0; i < bestFriends.length; i++) { 18 | console.log(`${bestFriends[i]} is my best friend!`); 19 | } 20 | 21 | type TCar = { 22 | model: string; 23 | year: number; 24 | isUsed: boolean; 25 | brand: string; 26 | }; 27 | 28 | const car: TCar = { 29 | brand: 'Toyota', 30 | model: 'Corolla', 31 | isUsed: false, 32 | year: 2012, 33 | }; 34 | 35 | console.log(car['brand']); 36 | console.log(car.model); 37 | 38 | console.log('The End'); 39 | -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | /* Visit https://aka.ms/tsconfig to read more about this file */ 4 | 5 | /* Projects */ 6 | // "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */ 7 | // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ 8 | // "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */ 9 | // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */ 10 | // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ 11 | // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ 12 | 13 | /* Language and Environment */ 14 | "target": "ES2022" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */, 15 | // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ 16 | // "jsx": "preserve", /* Specify what JSX code is generated. */ 17 | // "experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */ 18 | // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ 19 | // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */ 20 | // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ 21 | // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */ 22 | // "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */ 23 | // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ 24 | // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ 25 | // "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */ 26 | 27 | /* Modules */ 28 | "module": "NodeNext" /* Specify what module code is generated. */, 29 | // "rootDir": "./", /* Specify the root folder within your source files. */ 30 | "moduleResolution": "NodeNext" /* Specify how TypeScript looks up a file from a given module specifier. */, 31 | // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ 32 | // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ 33 | // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ 34 | // "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */ 35 | // "types": [], /* Specify type package names to be included without being referenced in a source file. */ 36 | // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ 37 | // "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */ 38 | // "allowImportingTsExtensions": true, /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */ 39 | // "resolvePackageJsonExports": true, /* Use the package.json 'exports' field when resolving package imports. */ 40 | // "resolvePackageJsonImports": true, /* Use the package.json 'imports' field when resolving imports. */ 41 | // "customConditions": [], /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */ 42 | // "resolveJsonModule": true, /* Enable importing .json files. */ 43 | // "allowArbitraryExtensions": true, /* Enable importing files with any extension, provided a declaration file is present. */ 44 | // "noResolve": true, /* Disallow 'import's, 'require's or ''s from expanding the number of files TypeScript should add to a project. */ 45 | 46 | /* JavaScript Support */ 47 | // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */ 48 | // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ 49 | // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */ 50 | 51 | /* Emit */ 52 | // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ 53 | // "declarationMap": true, /* Create sourcemaps for d.ts files. */ 54 | // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ 55 | // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ 56 | // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ 57 | // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */ 58 | // "outDir": "./", /* Specify an output folder for all emitted files. */ 59 | // "removeComments": true, /* Disable emitting comments. */ 60 | // "noEmit": true, /* Disable emitting files from a compilation. */ 61 | // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ 62 | // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */ 63 | // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ 64 | // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ 65 | // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ 66 | // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ 67 | // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ 68 | // "newLine": "crlf", /* Set the newline character for emitting files. */ 69 | // "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */ 70 | // "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */ 71 | // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ 72 | // "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */ 73 | // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ 74 | // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ 75 | 76 | /* Interop Constraints */ 77 | // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ 78 | // "verbatimModuleSyntax": true, /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */ 79 | // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ 80 | "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */, 81 | // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ 82 | "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */, 83 | 84 | /* Type Checking */ 85 | "strict": true /* Enable all strict type-checking options. */, 86 | // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */ 87 | // "strictNullChecks": true, /* When type checking, take into account 'null' and 'undefined'. */ 88 | // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ 89 | // "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */ 90 | // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ 91 | // "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */ 92 | // "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */ 93 | // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ 94 | // "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */ 95 | // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */ 96 | // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ 97 | // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ 98 | // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ 99 | // "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */ 100 | // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ 101 | // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */ 102 | // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ 103 | // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ 104 | 105 | /* Completeness */ 106 | // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ 107 | "skipLibCheck": true /* Skip type checking all .d.ts files. */ 108 | } 109 | } 110 | --------------------------------------------------------------------------------