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javascript/snippets/partial.md

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+---
+title: Prepend function arguments
+type: snippet
+tags: [function]
+cover: interior-6
+dateModified: 2020-09-15T16:28:04+03:00
+---
+
+Creates a function that invokes `fn` with `partials` prepended to the arguments it receives.
+
+- Use the spread operator (`...`) to prepend `partials` to the list of arguments of `fn`.
+
+```js
+const partial = (fn, ...partials) => (...args) => fn(...partials, ...args);
+```
+
+```js
+const greet = (greeting, name) => greeting + ' ' + name + '!';
+const greetHello = partial(greet, 'Hello');
+greetHello('John'); // 'Hello John!'
+```