[GRASS-user] Practical examples for t.select

[nik at nikosalexandris.net]

Nikos:

> Even the theoretically equivalent expression (to the first one) won't 
> do:
> ```
> ...
>     raise SyntaxError("syntax error on line %d, position %i token %s
> near '%s' expression '%s'" %
> SyntaxError: syntax error on line 1, position 11 token
> T_SELECT_OPERATOR near '{:,equal}' expression 'test3 = if({:,equal},
> A1 >= -30, A2)'
> ```

This is actually
```
>     raise SyntaxError("syntax error on line %d, position %i token %s
> near '%s' expression '%s'" %
> SyntaxError: syntax error on line 1, position 11 token
> T_SELECT_OPERATOR near '{:,equal}' expression 'test = if({:,equal},
> A1 >= -30, A2)'
> ```

(`test` and not `test3` -- manually edited the name before)