Function joinKeys

toml/stringify.ts:6–16

(keys: string[])

// Bare keys may only contain ASCII letters,
// ASCII digits, underscores, and dashes (A-Za-z0-9_-).
function joinKeys(keys: string[]): string {
  // Dotted keys are a sequence of bare or quoted keys joined with a dot.
  // This allows for grouping similar properties together:
  return keys
    .map((str: string): string => {
      return str.length === 0 || str.match(/[^A-Za-z0-9_-]/)
        ? JSON.stringify(str)
        : str;
    })
    .join(".");
}

type ArrayType =
  | "ONLY_PRIMITIVE"