domingo, 27 de octubre de 2013

Dealing with generated code in HTML

Last night one friend of my calls me to help him with the application they use at the school he works. He wanted to have the final grades less than 70 with red color. It's only a one java-script function he tells me. And it's true. But there is a hidden story in that simple java-script function.

First of all. I start checking that the table is a generated table. No problem with this. But then i noticed something funny all the rows have the same ID. WTF was my first impression.
 <TD class=xl30 id="table1">{rc_ClassAvg1} </TD>  
 <TD class=xl30>>&nbsp;</TD>  
 <TD class=xl30 id="table2">>{rc_ClassAvg2} </TD>  
 <TD class=xl30>&nbsp;</TD>  
 <TD class=xl30 id="table3">{rc_ClassAvg3} </TD>  
rc_ClassAvg1 generates the code for all the grades, and all the rows it generates come with id=table1.

So my simple java-script file had to deal with repeated rows with the same idea. Looking at stackoverflow I found this question.

It help me deal with the generated code that had the same id.


 this.changecolor = function(){  
  var value;  
  var id;  
   var n = document.getElementById("table1");  
   var a = [];  
   var y=1;  
   while(n) {  
     a.push(n);  
     n.id = "table"+y;  
   y=y+1;  
     n = document.getElementById("table");  
  }  
  for(i=0;i<a.length;i++){  
   elementid=a[i].id;  
   value=document.getElementById(elementid).innerHTML;  
   if (value < 70 ){  
    document.getElementById(elementid).style.color='red';  
   }  
  }  
 };  
At the end I have to go by each element change the element id and put this elements in an array.
This would have been solved other way if my generated code didn't include the same id for each element. I guess that's a bug.

Just wondering what solution would have you done?

martes, 8 de octubre de 2013

Scratch for Arduino

Whoa it sounds cool. Everyone knows what Scratch is. The programming language for kids, and almost has an idea what arduino is.But this two names together? It's not possible. Yes is possible, many people complain that is difficult to program in arduino. They will like something simple as the Lego Programming.

I was reading yesterday, and discover this: S4A
Scratch for Arduino. I haven't try it yet, but I am waiting to get home tonight to test it.
I will do some of the tutorials and write about it, if you have test waiting to read your opinion about it.

viernes, 4 de octubre de 2013

Adobe has been hacked!



I just read the news in Geek.com.
Adobe has discovered millions of records have been stolen from their database.
This is a list of what Adobe has reported:
  • Adobe customer ID
  • Customer name
  • Encrypted passwords
  • Encrypted debit card numbers
  • Encrypted credit card numbers
  • Card expiration date

Besides the customer information, they also stole the source code of many of Adobe products, so you will see probably some Adobe Photoshop VX for free.

Adobe will be offering a one year complimentary credit monitoring service membership as well as guidance on how to protect against card fraud to all the adobe users.

If you want to read more about this check this article.