Add support for NaN value #49
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NaN cannot be checked as equality. This commit add a test based on isNaN
Typescript definitions
anko reviewed Jan 7, 2020
| }); | ||
| | ||
| describe('nested NaN', () => { | ||
| test('returns empty object when there is nested NaN value', () => { |
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This test description confused me.
More concrete wording:
Suggested change
| test('returns empty object when there is nested NaN value', () => { | |
| test('treats NaN -> NaN as unchanged', () => { |
| | ||
| if (typeof lhs === "number" && typeof rhs === "number") { | ||
| if (isNaN(lhs) && isNaN(rhs)) return {}; // NaN is equal | ||
| } |
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Could use Number.isNaN to check both Number type and NaN value simultaneously.
- if (typeof lhs === "number" && typeof rhs === "number") { - if (isNaN(lhs) && isNaN(rhs)) return {}; // NaN is equal - } + if (Number.isNan(lhs) && Number.isNan(rhs)) return {}; // NaN is equal
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@anko you meant to cap the last 'n' --> Number.isNaN
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NaN cannot be checked as equality. This commit add a test based on isNaN