Documentation

clear

Remove all keys and values from cache

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 in n.

clear removes 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 type mps.cache.RedisCache or mps.cache.MATFileCache.

Example: c

Output Arguments

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

Example: 5

See Also

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Topics

Introduced in R2018b