Let's make it a less abstract example first element.setValue value unless no_change I'd read this example as: In most cases, we set the value of the eleme

Let's make it a less abstract example first element.setValue value unless no_change I'd read this example as: In most cases, we set the value of the element. However, sometimes there haven't been any chances, so there's no need to set any new value. Of course, I could write it as, for example if change element.setValue but to me, however, although the end result is the same, that second example does not convey the same message to me as the first. In the second example, I'd interpret the normal situation as there being no change, but if there is one, update the element. I think that's also the reason why I like programming in ruby. I feel I am able to better express my understanding of the situation in code than I could if these seemingly syntactical sugary bits weren't there. I also think it is mostly a matter of personal preference.