in my application a user can post his/her article that other users can response upon ans vote up and down also like stackoverflow has for posted question ans answers.
How can I restrict user so that he/she can’t vote twice ?
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in my application a user can post his/her article that other users can response upon ans vote up and down also like stackoverflow has for posted question ans answers.
How can I restrict user so that he/she can’t vote twice ?
Two methods:
<{userID}, {vote UP/DOWN}, {articleID}>StackOverflow uses database to store all this data. They also lock your vote after some period so you cannot undo your action.