TypeScript function which converts 0-based line and column into an index into a string
import { lineColumnToIndex } from "line-and-column-to-string-index";
const myString = `
something something blah blah
blah fjdkfdsjfklds
dsjfkdsljfkldsjfklsdsjfkdsjfl!!
`;
const line = 2; // 0-based
const column = 2; // 0-based
const index = lineColumnToIndex(myString, line, column);
console.log(index); // 33MIT