“But ‘glory’ doesn’t mean ‘a nice knockdown argument’,” Alice objected.
“When I use a word,” Humpty Dumpty said, in rather a scornful tone, “it means just what I choose it to mean—neither more nor less.”
“The question is,” said Alice, “whether you can make words mean so many different things.”
“The question is,” said Humpty Dumpty, “which is to be master—that’s all.”
—Lewis Carroll, Through the Looking-Glass, 1872
Section 4 is the meat of the book. You’ll find a listing for every command, function, property, event, method and system variable. We’ve grouped them logically so that you can find several related topics in one place. For an explanation of the syntax we use for commands, see “How to Use This Book,” back in the Introduction.