the main language of useful.db is Typescript
npm install useful.db
import { Main } from 'useful.db'
const db = new Main("./example.json")
const { Main } = require("useful.db")
const db = new Main("./example.json")
db.set("example") /* make a new data */
/* --> {"example", "example"} */
db.has("example")
/* --> return true or false */
db.delete("example")
/* --> delete the data */
db.get("example")
/* --> return data */
db.push("key", ["data"]) /* make a new array data */
/* --> {"key":["data"]} */
db.getAll()
/* return you all data in file */
db.math(5, "+", 5)
/* --> 10 */
db.math(10, "/", 5)
/* --> 2 */
db.math(5, "*", 5)
/* --> 25 */
db.math(10, "-", "5")
/* --> 5 */