Yeah, I should have provided some vocabulary (so you can Google or whatever).
It's a function, placed in parenthesis, and then immediately invoked (by the second pair of parenthesis). It executes a block of code inside the scope of a function. We've tended to call it an immediately-invoked function expression: http://en.wikipedia.org/wiki/Immediately-invoked_function_expression And forEach is one of the many methods available to call on Arrays: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach I'd suggest reading up on all the available methods defined by ECMAScript (the formal name for what is often called JavaScript - I prefer simply "ES") for String, Number, Array, Date, Function, etc. On Thursday, July 11, 2013 1:20:13 PM UTC-7, Jean-Michel Hiver wrote: > > This is where the black magic starts... could you explain to me (or point > an appropriate resource) what the > > for (...) ( function(i) { > ... > } )(i); > > syntax does? I'm totally un-familiar with this syntax. > > >> Or use Array's forEach method which does this more compactly: >> >> array.forEach(function(item, i){ >> setTimeout(function(item) { >> console.log(item); >> }, 1000*i); >> } >> > > That seems sorts of more understandable to me, although I'm not completely > sure what's going on here. > > > -- -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
