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ltrim

Trims an existing list so that it will contain only the specified range of elements specified.

[Redis documentation]

Arguments

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ltrim(key, start, stop, [options]);

Arguments Type Description
key
string
List key
start
integer
Starting index (inclusive)
stop
integer
Ending index (inclusive)
options
object
Optional query arguments

The start and stop arguments can be negative. In that case, the offset is calculated from the end of the list, going backward. For instance, -3 is the third element from the end of the list.

options

The options arguments can contain the following option properties:

Property Type (default) Description
queuable
boolean (true)
If true, queues the request during downtime, until connected to Kuzzle again

Resolve

Resolves once the operation is finished.

Usage

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try {
  await kuzzle.ms.rpush('listfoo', ['a', 'b', 'c', 'd', 'e', 'f']);
  await kuzzle.ms.ltrim('listfoo', 3, -2);
  // Prints [ 'd', 'e' ]
  console.log(await kuzzle.ms.lrange('listfoo', 0, -1));
} catch (error) {
  console.error(error.message);
}