As @tootallnate said, arg is mandatory
But an alternative is
dosomething( ....., function (err, data) { if (err) { .... ; return; }
myfunc(data); });
function myfunc(data) {
}
On Thu, Feb 6, 2014 at 6:42 AM, Nathan Rajlich <nat...@tootallnate.net>wrote:
> Nope. The `err` arg is mandatory. Sorry.
>
>
> On Thu, Feb 6, 2014 at 1:37 AM, ami <aminad...@gmail.com> wrote:
>
>> Must of async' function of nodejs get a callback with first parameter is
>> err.
>>
>> *like:*
>>
>> request('',callback)
>> fs.readFile('',callback)
>> express.get(callback)
>>
>>
>> *Do I must to add the err argument?*
>>
>> *can I use this function:*
>>
>> function mycallback(data){
>> }
>>
>>
>> *Instead of:*
>>
>> function mycallback(err, data){
>> }
>>
>>
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