---
name: "bson_append_code"
section: "3"
platform: "linux"
package: "libbson-doc"
version: "1.30.4-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/bson_append_code"
---

# bson\_append\_code(3)

## SYNOPSIS

```
#define BSON_APPEND_CODE(b, key, val) \
   bson_append_code (b, key, (int) strlen (key), val)
bool
bson_append_code (bson_t *bson,
                  const char *key,
                  int key_length,
                  const char *javascript);
```

## PARAMETERS

- •

  **bson**: A *bson\_t*.

- •

  **key**: The key name.

- •

  **key\_length**: The length of **key** or -1 to use strlen().

- •

  **javascript**: A UTF-8 encoded string containing the javascript.

## DESCRIPTION

The *bson\_append\_code()* function shall append a new element to **bson** using the UTF-8 encoded **javascript** provided. **javascript** must be a NULL terminated C string.

## RETURNS

Returns **true** if the operation was applied successfully. The function will fail if appending **javascript** grows **bson** larger than INT32\_MAX.

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.