May 2008
Intermediate to advanced
172 pages
4h 54m
English
Content preview from JavaScript: The Good PartsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Semicolon
JavaScript uses a C-like syntax, which requires the use of semicolons to delimit statements. JavaScript attempts to make semicolons optional with a semicolon insertion mechanism. This is dangerous.
Like C, JavaScript has ++ and -- and ( operators,
which can be prefixes or suffixes. The disambiguation is done by the
semicolon.
In JavaScript, a linefeed can be whitespace, or it can act as a semicolon. This replaces one ambiguity with another.
JSLint expects that every statement be followed by ; except for for, function, if,
switch, try, and while. JSLint does not
expect to see unnecessary semicolons or the empty statement.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.