lpop

Removes and returns the first element of a list.

[Redis documentation]


lpop(key, [options], [callback])

Arguments Type Description
key string Key identifier
options JSON Object Optional parameters
callback function Callback

Options

Option Type Description Default
queuable boolean Make this request queuable or not true

Return Value

Returns the MemoryStorage object to allow chaining.


Callback Response

Returns the value of the removed item.

Usage

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// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.lpop('key', function (err, value) {
  // callback called once the action has completed
});

// Using promises (NodeJS only)
kuzzle.memoryStorage.lpopPromise('key')
  .then(value => {
    // resolved once the action has completed
  });

Callback response:

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"foo"