# Object.concat

## Function

Merge one or more objects into a new object.

## Syntax

```bt
object.concat(source1, source2, ...)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| sourceN | Object | No | None | The object to merge; non-object arguments are ignored. |

## Return value

| Type | Description |
| ------ | ------ |
| Object | Returns the new merged object. |

## Return object fields

The returned object first copies the fields of the current object, and then copies the fields of each source object in parameter order; fields with the same name are overwritten by the object passed in later. No fields are written to non-object parameters.

## Example

```bt
base = {name: 'BT'}
result = base.concat({age: 1})

// Output: {"name":"BT","age":1}
print result
```

## Notes

- The key with the same name passed in later will overwrite the previous value.
- The original object will not be modified.