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Sync with upstream @ 5e893cff #218

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a1257db
clarify wording about null and undefined equality in JS
Lk-ux Nov 9, 2025
aa3841a
Update 1-js/02-first-steps/09-comparison/article.md
smith558 Nov 12, 2025
5e893cf
Merge pull request #3902 from Lk-ux/patch-2
smith558 Nov 12, 2025
9a9ceb5
merging all conflicts
iliakan Nov 17, 2025
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8 changes: 8 additions & 0 deletions 1-js/02-first-steps/09-comparison/article.md
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Expand Up @@ -215,8 +215,16 @@ alert( undefined == 0 ); // невярно (3)

## Обобщение

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- Операторите за сравнение връщат булева стойност.
- Символните низове(текст) се сравняват символ по символ в "лексикографски" ред.
- Когато се сравняват стойности от различни типове, те се преобразуват в числа (с изключение на строга проверка за равенство).
- Стойностите `null` и `undefined` са равни `==` само една на друга, и на никоя друга стойност.
- Бъдете внимателни, когато използвате сравнения като `>` или `<` с променливи, които понякога могат да бъдат `null/undefined`. Проверката за `null/undefined` отделно е добра идея.
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- Comparison operators return a boolean value.
- Strings are compared letter-by-letter in the "dictionary" order.
- When values of different types are compared, they get converted to numbers (with the exclusion of a strict equality check).
- The values `null` and `undefined` are equal `==` to themselves and each other, but do not equal any other value.
- Be careful when using comparisons like `>` or `<` with variables that can occasionally be `null/undefined`. Checking for `null/undefined` separately is a good idea.
>>>>>>> 5e893cffce8e2346d4e50926d5148c70af172533