This example shows how to create and initialize Maps in TypeScript. creating_maps.ts const userRoles = new Map<number, string>(); userRoles.set(1, 'Admin'); userRoles.set(2, 'Editor'); const productPrices = new
{test:/\.vue$/,loader:'vue-loader',options:{loaders:{// Since sass-loader (weirdly) has SCSS as its default parse mode, we map// the "scss" and "sass" values for the lang attribute to the right configs here.// other preprocessors should work out of the box, no loader config ...
--init Initializes a TypeScript project and creates a tsconfig.json file. --project, -p Compile the project given the path to its configuration file, or to a folder with a 'tsconfig.json'. --build, -b Build one or more projects and their dependencies, if out of date --showConfig Pr...
*/ names: string[]; /** string literals to specify exact string values, with a union type to join them together */ status: "waiting" | "success"; /** an object with known properties (but could have more at runtime) */ obj: { id: string; title: string; }; /** array of ...
interface TypeMap { "number": number; "string": string; "boolean": boolean; } type UnionRecord<P extends keyof TypeMap> = { [K in P]: { kind: K; v: TypeMap[K]; f: (p: TypeMap[K]) => void; } }[P]; function processRecord<K extends keyof TypeMap>(record: UnionRecord<K>...
The following code declares a constant variable namedalicewith the typePerson. This means thatalicemust adhere to the structure defined by thePersontype. Then we initialize thealiceobject with concrete values of the keys. const alice: Person = { ...
functioninitializeTypeChecker() {// Bind all source files and propagate errorsfor(constfileofhost.getSourceFiles()){bindSourceFile(file,compilerOptions);}amalgamatedDuplicates=newMap();// Initialize global symbol tableletaugmentations:(readonly(StringLiteral|Identifier)[])[]|undefined;for(constfileofho...
{ "@types/jest": "^26.0.10", "@types/node": "10.17.27", "jest": "^26.4.2", "ts-jest": "^26.2.0", "aws-cdk": "2.16.0", "ts-node": "^9.0.0", "typescript": "~3.9.7" }, "dependencies": { "aws-cdk-lib": "2.16.0", "constructs": "^10.0.0", "source-map-...
function getValues<T, K extends keyof T>(person: T, keys: K[]): T[K][] { return keys.map(key => person[key]); } interface Person { name: string; age: number; } const person: Person = { name: 'musion', age: 35 } getValues(person, ['name']) // ['musion'] getValues(...
这篇文章参考了很多文章以及看了一些ts视频,然后把基础的知识点全部总结了一下.感觉比掘金上的所有typescript入门的热门文章都要详细 ,因为那些热门文章我全部都参考了,内容基本都包含了.这一次一定得沉淀下来。好好的把这篇文章给写完.