HTC One Battery Charging - Fully drain or not?

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http://forums.androidcentral.com – I just bought a shiny new HTC one and am super pleased with it. A friend of mine (who has an iphone 5) recently told me that I should let the battery fully drain 4-5 times and fully charge it to 100% from 0% during the first couple of weeks - and then do it once a month thereafter to prolong the battery life. I did a search on this forum and people's opinions on this seem scattered. Some people swear by it, and others claim it actually harms the battery to fully drain it. Can anyone give a reasonably sound opinion on whether this "full drain" should be done with this particular (HowTos)