lpop #
Removes and returns the first element of a list.
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 #
// 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:
"foo"
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