3 ms·

Missing semicolons have more pitfalls than just minifiers being naughty. return someExpression will parse out as: return; someExpression; and you ha

Missing semicolons have more pitfalls than just minifiers being naughty. return someExpression will parse out as: return; someExpression; and you have assumption of function call in x = y (z).whatever() which parses out as x = y(z).whatever() Nothing hint or lint wouldn't catch though. IMHO, you really need to be special to avoid explicitly writing out semicolons, but to each his own. I can maybe give it a point for unique style. :)

Nadya 11y ago
Only evil people put their return value on a second line... Regardless: http://blog.izs.me/post/2353458699/an-open-letter-to-javascript-leaders-regarding http://blog.izs.me/post/2353458699/an-open-letter-to-javascr... Although to be fair: http://benalman.com/news/2013/01/advice-javascript-semicolon-haters/ http://benalman.com/news/2013/01/advice-javascript-semicolon...
- Roboprog 11y ago
  Wow, I got schooled. Did not realize rule 4 about lines starting with array subscript brackets or function argument parens. (regardless of the line's intent of perhaps being an array literal or simply starting with an expression to be evaluated early) The sad reality, taking the second link to its satirical conclusion, is that all JS should be written on one line, with semicolons between statements. No guessing about the effects of line breaks if there aren't any. "I say we take off and nuke the entire site from orbit - it's the only way to be sure." :-)
  - Nadya 11y ago
    While I favor Ruby/Python syntax, I'm impartial about semicolons. There are bigger battles to fight! For example, heretics who use comma-first arrays.
Roboprog 11y ago
How would semicolons have prevented the first of those misunderstandings? -- Don't get me wrong, those are good cases to know what is going to happen. But I think you are making the case that semicolons provide a false security blanket, since the language can complete a line you meant to wrap, or, alas, merge 2 lines you meant to have separate. I think shell (and a few other languages) actually got it right: 1 line = 1 statement, unless there is an explicit continuation.

Nadya 11y ago

Only evil people put their return value on a second line... Regardless: http://blog.izs.me/post/2353458699/an-open-letter-to-javascript-leaders-regarding http://blog.izs.me/post/2353458699/an-open-letter-to-javascr... Although to be fair: http://benalman.com/news/2013/01/advice-javascript-semicolon-haters/ http://benalman.com/news/2013/01/advice-javascript-semicolon...

Roboprog 11y ago
Wow, I got schooled. Did not realize rule 4 about lines starting with array subscript brackets or function argument parens. (regardless of the line's intent of perhaps being an array literal or simply starting with an expression to be evaluated early) The sad reality, taking the second link to its satirical conclusion, is that all JS should be written on one line, with semicolons between statements. No guessing about the effects of line breaks if there aren't any. "I say we take off and nuke the entire site from orbit - it's the only way to be sure." :-)
- Nadya 11y ago
  While I favor Ruby/Python syntax, I'm impartial about semicolons. There are bigger battles to fight! For example, heretics who use comma-first arrays.

Roboprog 11y ago

How would semicolons have prevented the first of those misunderstandings? -- Don't get me wrong, those are good cases to know what is going to happen. But I think you are making the case that semicolons provide a false security blanket, since the language can complete a line you meant to wrap, or, alas, merge 2 lines you meant to have separate. I think shell (and a few other languages) actually got it right: 1 line = 1 statement, unless there is an explicit continuation.