25 lines
625 B
Markdown
25 lines
625 B
Markdown
---
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title: Logical and for functions
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tags: function,logic
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expertise: beginner
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unlisted: true
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firstSeen: 2020-05-13T11:35:36+03:00
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lastUpdated: 2021-01-04T13:04:15+02:00
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---
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Checks if both of the given functions return `true` for a given set of arguments.
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- Use the logical and (`&&`) operator on the result of calling the two functions with the supplied `args`.
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```js
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const both = (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 isPositiveEven = both(isEven, isPositive);
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isPositiveEven(4); // true
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isPositiveEven(-2); // false
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```
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