new LowlevelUp(file, options)
Extremely low-level version of levelup.
The only levelup feature it provides is
error-wrapping. It gives a nice recallable
open() method and event. It assumes ascii
keys and binary values.
This avoids pulling in extra deps and lowers memory usage.
Parameters:
| Name | Type | Description |
|---|---|---|
file |
String | Location. |
options |
Object | Leveldown options. |
- Source:
Methods
approximateSize(start, end, callback)
Calculate approximate database size.
Parameters:
| Name | Type | Description |
|---|---|---|
start |
String | Start key. |
end |
String | End key. |
callback |
function | Returns [Error, Number]. |
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batch(opsnullable, optionsnullable, callback) → {Leveldown.Batch}
Create an atomic batch.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
ops |
Array |
<nullable> |
|
options |
Object |
<nullable> |
|
callback |
function |
- Source:
Returns:
- Type
- Leveldown.Batch
close(callback)
Close the database (not recallable).
Parameters:
| Name | Type | Description |
|---|---|---|
callback |
function |
- Source:
del(key, optionsnullable, callback)
Remove a record from the database.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
key |
String | ||
options |
Object |
<nullable> |
|
callback |
function |
- Source:
get(key, optionsnullable, callback)
Retrieve a record from the database.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
key |
String | ||
options |
Object |
<nullable> |
|
callback |
function | Returns [Error, Buffer]. |
- Source:
getProperty(name) → (nullable) {String}
Get a database property.
Parameters:
| Name | Type | Description |
|---|---|---|
name |
String | Property name. |
- Source:
Returns:
- Type
- String
iterator(options) → {Leveldown.Iterator}
Create an iterator.
Parameters:
| Name | Type | Description |
|---|---|---|
options |
Object |
- Source:
Returns:
- Type
- Leveldown.Iterator
open(callback)
Open the database (recallable).
Parameters:
| Name | Type | Description |
|---|---|---|
callback |
function |
- Source:
put(key, value, optionsnullable, callback)
Store a record in the database.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
key |
String | ||
value |
Buffer | ||
options |
Object |
<nullable> |
|
callback |
function |
- Source: