HTML, CSS, & JavaScript All-in-One For Dummies

Chapter 7

Working with Arrays

IN THIS CHAPTER

Learning what arrays can do for you

Declaring an array variable

Populating an array with data

Iterating an array

Trying out multidimensional arrays

Working with JavaScript’s Array object

The disorder of the desk, the floor; the yellow Post-It notes everywhere; the whiteboards covered with scrawl: all this is the outward manifestation of the messiness of human thought. The messiness cannot go into the program; it piles up around the programmer.

—ELLEN ULLMAN

I’ve talked quite a bit about efficient programming in this book because I believe (okay, I know) that efficient scripts run faster and take less time to program and debug. Efficiency in programming really means eliminating unnecessary repetition, whether it’s consolidating statements into a loop that can be repeated as often as required (refer to Book 4, Chapter 4) or moving code into ...