[OpenSCAD] How to detect chr(0)

MichaelAtOz oz.at.michael at gmail.com
Fri Apr 17 18:12:29 EDT 2015

Also, NULL can be represented as "\u0000"

echo(t,u); //ECHO: ""," "
if (t==u)
  echo("t==u"); // no
if (u==u2)
  echo("u==u2"); // yes
text(u);  // blank

You should read the 'invalid characters' part in the Wikipedia article.
There a a number of Unicode chars in the range 0x7F-0xFF that are invalid.
It is just luck that they seem to work.

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