It depends ...
The question you need to be able to answer is:
As a user, do I need to scan the entire row before I can make an educated decision if the row I am looking at is the row I want to "edit" or "delete"?
If the amount of the information an end-user needs to scan is fairly small and by only looking at the "Address" column you can make that decision, then having actions on the left hand side makes the most sense. You don't want to force the end-user to follow the entire row to act on that item if they decided after looking at very first column.
On the other hand, if an end-user has to scan the entire row to decide, then actions on the right hand side makes the most sense.
To complicate things even more, your app/website should NOT use different design patterns around table row actions. Row actions should be located in a consistent place so that the end-user won't have to relearn the pattern from page to page.
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