didYouMean.mjs 772 B

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  1. const MAX_SUGGESTIONS = 5;
  2. /**
  3. * Given [ A, B, C ] return ' Did you mean A, B, or C?'.
  4. */
  5. export function didYouMean(firstArg, secondArg) {
  6. const [subMessage, suggestionsArg] = secondArg
  7. ? [firstArg, secondArg]
  8. : [undefined, firstArg];
  9. let message = ' Did you mean ';
  10. if (subMessage) {
  11. message += subMessage + ' ';
  12. }
  13. const suggestions = suggestionsArg.map((x) => `"${x}"`);
  14. switch (suggestions.length) {
  15. case 0:
  16. return '';
  17. case 1:
  18. return message + suggestions[0] + '?';
  19. case 2:
  20. return message + suggestions[0] + ' or ' + suggestions[1] + '?';
  21. }
  22. const selected = suggestions.slice(0, MAX_SUGGESTIONS);
  23. const lastItem = selected.pop();
  24. return message + selected.join(', ') + ', or ' + lastItem + '?';
  25. }