23 lines
618 B
Markdown
23 lines
618 B
Markdown
---
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title: Prepend function arguments
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tags: function
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expertise: intermediate
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cover: blog_images/interior-6.jpg
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firstSeen: 2018-01-24T14:40:16+02:00
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lastUpdated: 2020-09-15T16:28:04+03:00
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---
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Creates a function that invokes `fn` with `partials` prepended to the arguments it receives.
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- Use the spread operator (`...`) to prepend `partials` to the list of arguments of `fn`.
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```js
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const partial = (fn, ...partials) => (...args) => fn(...partials, ...args);
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```
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```js
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const greet = (greeting, name) => greeting + ' ' + name + '!';
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const greetHello = partial(greet, 'Hello');
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greetHello('John'); // 'Hello John!'
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```
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