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A comment on Show HN: Deck of Cards – A playing card API. Parent comment

Re:Show HN: Deck of Cards – A playing card API by jalfresi on Monday May 11, 2015 @08:38AM (#9524191)
The example I gave is idempotent. Calling it n >0 times would result in the same side effects.
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Re:Show HN: Deck of Cards – A playing card API by couchand on Monday May 11, 2015 @08:50AM (#9524260)
That's not what idempotent means. It doesn't mean it produces the same side effects every time, it means multiple calls are equivalent to a single call.
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Re:Show HN: Deck of Cards – A playing card API by jalfresi on Monday May 11, 2015 @09:03AM (#9524342)
Gah! You're right. In that case POST would be the only acceptable option here.
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