31 lines
828 B
Markdown
31 lines
828 B
Markdown
---
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title: size
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tags: object,array,string,intermediate
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---
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Gets the size of an array, object or string.
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- Get type of `val` (`array`, `object` or `string`).
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- Use `Array.prototype.length` property for arrays.
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- Use `length` or `size` value if available or number of keys for objects.
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- Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.
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- Split strings into array of characters with `split('')` and return its length.
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```js
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const size = val =>
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Array.isArray(val)
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? val.length
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: val && typeof val === 'object'
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? val.size || val.length || Object.keys(val).length
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: typeof val === 'string'
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? new Blob([val]).size
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: 0;
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```
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```js
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size([1, 2, 3, 4, 5]); // 5
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size('size'); // 4
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size({ one: 1, two: 2, three: 3 }); // 3
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```
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