23 lines
582 B
Markdown
23 lines
582 B
Markdown
---
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title: either
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tags: function,logic,beginner
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firstSeen: 2020-05-13T11:35:46+03:00
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lastUpdated: 2020-10-19T18:51:03+03:00
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---
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Checks if at least one function returns `true` for a given set of arguments.
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- Use the logical or (`||`) operator on the result of calling the two functions with the supplied `args`.
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```js
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const either = (f, g) => (...args) => f(...args) || g(...args);
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```
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```js
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const isEven = num => num % 2 === 0;
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const isPositive = num => num > 0;
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const isPositiveOrEven = either(isPositive, isEven);
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isPositiveOrEven(4); // true
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isPositiveOrEven(3); // true
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```
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