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# buildQueryString(object)
- [Description](#description)
- [Signature](#signature)
- [How it works](#how-it-works)
---
### Description
Turns an object into a string of form `a=1&b=2`
```javascript
var querystring = m.buildQueryString({a: "1", b: "2"})
// "a=1&b=2"
```
---
### Signature
`querystring = m.buildQueryString(object)`
Argument | Type | Required | Description
------------ | ------------------------------------------ | -------- | ---
`object` | `Object` | Yes | A key-value map to be converted into a string
**returns** | `String` | | A string representing the input object
[How to read signatures](signatures.md)
---
### How it works
The `m.buildQueryString` creates a querystring from an object. It's useful for manipulating URLs
```javascript
var querystring = m.buildQueryString({a: 1, b: 2})
// querystring is "a=1&b=2"
```
#### Deep data structures
Deep data structures are serialized in a way that is understood by popular web application servers such as PHP, Rails and ExpressJS
```javascript
var querystring = m.buildQueryString({a: ["hello", "world"]})
// querystring is "a[0]=hello&a[1]=world"
```
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