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Date: Fri, 9 Nov 2012 21:01:22 -0800 (PST)
From: Alexey Petrushin <alexey.petrus...@gmail.com>
To: nodejs@googlegroups.com
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References: <CAPgQht0NsofhjKOHqyQm879BzcaubT3ow8uEfpEcb1ZDsuOi_g@mail.gmail.com>
 <30865de6-de86-4aa2-8c99-6039c1baec3b@googlegroups.com>
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Subject: Re: fibers 0.5; say "no" callbacks (when it makes sense in your
 application)
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Error handling with callbacks is especially interesting, try this code - 
the 'Surprise' error won't be caught. 

    // Catching synchronous errors.
    try {
      myFunction(function(err){
        // Catching asynchronous errors.
        if(err) return console.log('error catched')
        console.log('no errors')
      })
    } catch(err) {
      console.log('error catched')
    }

    var myFunction = function(cb){
      setTimeout(function(){
        someFunctionDeepInLibrary(cb)
      }, 100) 
    }

    var someFunctionDeepInLibrary = function(cb){
      throw new Error("Surprise!")
    }

Live version (open console to see the result) http://tinkerbin.com/axnxQte5

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Error handling with callbacks is especially interesting, try this code - th=
e 'Surprise' error won't be&nbsp;caught.&nbsp;<div><div><br></div><div><div=
>&nbsp; &nbsp; // Catching synchronous errors.</div><div>&nbsp; &nbsp; try =
{</div><div>&nbsp; &nbsp; &nbsp; myFunction(function(err){</div><div>&nbsp;=
 &nbsp; &nbsp; &nbsp; // Catching asynchronous errors.</div><div>&nbsp; &nb=
sp; &nbsp; &nbsp; if(err) return console.log('error catched')</div><div>&nb=
sp; &nbsp; &nbsp; &nbsp; console.log('no errors')</div><div>&nbsp; &nbsp; &=
nbsp; })</div><div>&nbsp; &nbsp; } catch(err) {</div><div>&nbsp; &nbsp; &nb=
sp; console.log('error catched')</div><div>&nbsp; &nbsp; }</div><div><br></=
div><div>&nbsp; &nbsp; var myFunction =3D function(cb){</div><div>&nbsp; &n=
bsp; &nbsp; setTimeout(function(){</div><div>&nbsp; &nbsp; &nbsp; &nbsp; so=
meFunctionDeepInLibrary(cb)</div><div>&nbsp; &nbsp; &nbsp; }, 100)<span cla=
ss=3D"Apple-tab-span" style=3D"white-space:pre">=09=09</span></div><div>&nb=
sp; &nbsp; }</div><div><br></div><div>&nbsp; &nbsp; var someFunctionDeepInL=
ibrary =3D function(cb){</div><div>&nbsp; &nbsp; &nbsp; throw new Error("Su=
rprise!")</div><div>&nbsp; &nbsp; }</div></div><div><br></div><div>Live ver=
sion (open console to see the result)&nbsp;http://tinkerbin.com/axnxQte5</d=
iv></div>
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