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Asked: 2026-05-27T18:15:12+00:00

After reading Douglas Crockford’s JavaScript: The Good Parts and Stoyan Stevanov’s JavaScript Patterns, I’m

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After reading Douglas Crockford’s “JavaScript: The Good Parts” and Stoyan Stevanov’s “JavaScript Patterns,” I’m trying to determine exactly what ‘excessive trickiness’ means. They both say that this occours when using either ++ or -- in your code, but can’t find a firm definition for this term, either within SO or via a Google search. Any ideas?

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  1. Editorial Team

    You can hear it from Crockford himself here: http://www.youtube.com/watch?feature=player_detailpage&v=47Ceot8yqeI#t=4140s

    The simple answer is that ++ and -- act on a variable, and usually do it at the same time as you’re doing something else to that variable. For example, can you quickly decide what this does?

    y += x++ + ++y; // what is y now?

    More StackOverflow discussion: Why avoid increment ("++") and decrement ("–") operators in JavaScript?

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