This is bad practice, and it can be easily overlooked inside of such a commonly-used bit of code. We could do this a couple of ways, but the following method will suffice to make JSLint happy: Well, technically, this code will give two other errors: They are second only to faulty architecture in enabling to viruses and other security menaces.
My guess is that using an increment operator in a harmless for loop is not going to cause much of a problem for you. But who am I to question?
So what is the alternative? Now there are no significant errors in this seemingly harmless bit of code. In a large application, and with large values and multiple loops, this can contribute to performance issues.
So although in many small instances this might not matter, it is best practice to try to cache values before using them.
Of course, you might have a case where decrementing your loop would not work, so this is just something to consider should the situation allow for it.
And by all means, do the necessary research before you take my word as gold.Introduction. Writing a best practice article is quite a tricky business. To a number of you, what you are about to read will appear to be very obvious and just the sensible thing to do.
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Also a but disappointed to see that my comment that is actually ontopic and adds explanation/insight gets 0 upvotes, but the comment that nitpicks on a term in my comment gets 4. When I did write loops like this I cached the length primarily so that all my variable declaration were in.