---
id: 5d792533a5c42fb4d1a4b70d
title: Step 14
challengeType: 0
dashedName: step-14
---
# --description--
Replace the second argument of `str.replace` with an anonymous function, which takes `match`, `arg1`, `fn`, and `arg2`, and returns `infixToFunction["+"]`.
# --hints--
See description above for instructions.
```js
assert(
code
.replace(/\s/g, '')
.includes('str.replace(regex,(match,arg1,fn,arg2)=>infixToFunction["+"])')
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```