Add key existence detection function

elbart / node-memcache

node.js memcached client

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Add key existence detection function #24

Closed yesme closed 12 years ago

yesme commented 12 years ago

Add the key existence detection function by using CAS trick.

For some scenarios, user may want to check if a key exists without fetching the value blob back. This "exist" method is provided to fulfill this usage.

Thanks, Jacky