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Re: How to have multiple and undetermined number of arguments for function?

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Am 10.10.2016 um 17:50 schrieb justaguy:
> On Monday, October 10, 2016 at 11:26:57 AM UTC-4, Jake Jarvis wrote:
>> Am 10.10.2016 um 16:57 schrieb justaguy:
>>> A related question.
>>>
>>> I have one array as an argument for my the function in question, such array reads as ['grantor_row2','input','text',70].
>>>
>>> In my loop for arguments, I have the following code with the intention of excluding this array,
>>> if (!arguments[counter][0].indexOf('_row2')) {
>>>  console.log(arguments[counter][0]);
>>> }
>>>
>>> But the console did not return the value of 'grantor_row2'.  What's wrong?
>>>
>>> Thanks.
>>>
>>
>> You are actually checking if the first element starts with "_row2".
>
> I see.  Thought, indexOf is sort of "contains".  In the meantime, I have another statement,
> if (arguments[counter][0].indexOf('_row2')) {
> // do this an that
> }
> and it found it.  How come?
>
> Thanks.
>

You need to look a bit closer, something is being done to the result of
indexOf.
The ! operator is applied to it.

indexOf just returns -1 or position inside the string

For what numbers that indexOf might return does ! give a true?
For a 0

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Thread

How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-08 14:48 -0700
  Re: How to have multiple and undetermined number of arguments for function? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-09 00:07 +0200
    Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-08 16:03 -0700
      Re: How to have multiple and undetermined number of arguments for function? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-09 09:59 +0200
  Re: How to have multiple and undetermined number of arguments for function? John Harris <niam@jghnorth.org.uk.invalid> - 2016-10-09 15:35 +0100
    Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-09 11:22 -0700
      Re: How to have multiple and undetermined number of arguments for function? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-09 20:09 +0100
        Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-09 13:32 -0700
          Re: How to have multiple and undetermined number of arguments for function? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-10-09 23:26 +0200
            Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-09 15:18 -0700
              Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-10 07:57 -0700
                Re: How to have multiple and undetermined number of arguments for function? Jake Jarvis <pig_in_shoes@yahoo.com> - 2016-10-10 17:26 +0200
                Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-10 08:50 -0700
                Re: How to have multiple and undetermined number of arguments for function? Jake Jarvis <pig_in_shoes@yahoo.com> - 2016-10-10 18:53 +0200
                Re: How to have multiple and undetermined number of arguments for function? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-10-10 18:22 +0100
                Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-10 11:20 -0700
                Re: How to have multiple and undetermined number of arguments for function? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-10-10 17:28 +0100
  Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-09 11:20 -0700
    Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-09 12:10 -0700
  Re: How to have multiple and undetermined number of arguments for function? justaguy <lichunshen84@gmail.com> - 2016-10-10 17:05 -0700

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