Add isArrayOfTrytes method in ValidatorUtil class

[peter279k]

• As title, add the isArrayOfTrytes method to validate the array of trytes.
• It's also related to issue isArrayOf should be divided into different isArrayOf methods  #64.

[peter279k]

@Techworker, please review this PR. Thanks.

[Techworker]

I don't see why you added the 2673 as a required length. The method is called isArrayOfTrytes and a trytestring does not necessarily need to be 2673 trytes long.

[peter279k]

Hi @Techworker, thank you for your reply.
I refer this line and I found that this should check the trytes is 2673.

Is this unnecessary? Thanks.

[Techworker]

I think its unnecessary

[peter279k]

Hi @Techworker, thank you for your reply. Do you mean I remove this 2673, and using the default value?

It makes sense I think. I will try that.