Some questions

[Joerg Sommer <joerg@xxxxxxxxxxxx>]

Hi,

is !if (foo) faster then if (foo != 0) or why exists this version of
negation?

How to declare a variable read only? slang.txt tells, that read only
variables are possible, but doesn't say how.

What does ".[var]"? (var is a variable) I found it in site.sl
custom_variable().

And what's with %!%+ and %!%-? Are this active comments? Where can I read
more about them? How to use them? Is there a function in jed, that helps
creating them?

Bye, Joerg.

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