---
id: 5d7925330918ae4a2f282e7e
title: Step 12
challengeType: 0
dashedName: step-12
---
# --description--
Use arrow function syntax to define a function `infixEval` which takes `str` and `regex` as arguments and returns `str.replace(regex, "")`.
# --hints--
See description above for instructions.
```js
assert(
/constinfixEval=\(str,regex\)=>str\.replace\(regex,['"]{2}\)/.test(
code.replace(/\s/g, '')
)
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```