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clear

Remove all keys and values from cache

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Syntax

n = clear(c)

Description

example

n= clear(c)removes all keys and values from cache and returns the number of keys cleared from the cache inn.

clearremoves both local and remote keys and values.

Examples

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Start a persistence service that uses Redis™ as the persistence provider. The service requires a connection name and an open port. Once the service is running, you can connect to the service using the connection name and create a cache.

ctrl = mps.cache.control('myRedisConnection','Redis','Port',4519); start(ctrl) c = mps.cache.connect('myCache','Connection','myRedisConnection');

Add keys and values to the cache and display them as a MATLAB®table.

put(c,'keyOne',10,'keyTwo',20,'keyThree',30,'keyFour',[400 500],'keyFive',magic(5)) tt = table(keys(c), get(c,keys(c))','VariableNames',{'Keys','Values'})
tt = 5×2 table Keys Values __________ ____________ 'keyFive' [5×5 double] 'keyFour' [1×2 double] 'keyOne' [ 10] 'keyThree' [ 30] 'keyTwo' [ 20]

Clear the cache and check if it is empty.

n = clear(c) k = keys(c)
n = int64 5 k = 0×1 empty cell array

Input Arguments

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A data cache represented by a persistence provider specific data cache object.

Currently, Redis and MATLAB are the only supported persistence providers. Therefore, the cache objects will be of typemps.cache.RedisCacheormps.cache.MATFileCache.

Example:c

Output Arguments

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Number of key-value pairs removed, returned as an integer.

Example:5

Version History

Introduced in R2018b

See Also

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