PowerD.html - Tips and tricks

Introduction:
PowerD has very flexible syntax what means, that You can use several of these to enshort or simplify Your code. Most of these examples are also shown in given documents, but this part shows most of these together.

SELECT <constant>:
If You want to eg.: check a variable for several strings, You can use eg.: IF statement:

  IF StrCmp(name,'one')
    x:=1
  ELSEIF StrCmp(name,'two')
    x:=2
  ELSEIF StrCmp(name,'three')
    x:=3
  ELSEIF StrCmp(name,'four')
    x:=4
  ELSE
    x:=0
  ENDIF

But SELECT statement supports also a constant for it's comparing variable:

  SELECT TRUE
  CASE StrCmp(name,'one');   x:=1
  CASE StrCmp(name,'two');   x:=2
  CASE StrCmp(name,'three'); x:=3
  CASE StrCmp(name,'four');  x:=4
  DEFAULT;                   x:=0
  ENDSELECT

Conditions:
PowerD's conditions each time returns TRUE if the condition is true and FALSE if not.
```
  a:=IF <condition> THEN TRUE ELSE FALSE
```
is the same as the:
```
  a:=<condition>
```
Multiple conditions:
PowerD condition scanner supports multiple conditions like:
```
  IF a>b>c THEN PrintF('True\n')
```
This is internaly converted to:
```
  IF a>b AND b>c THEN PrintF('True\n')
```
PreProcessor assign shortage:
PowerD preprocessor has a feature, that checks each <var>:=.<item>. Each:
```
  var:=.item
```
will be replaced with:
```
  var:=var.item
```
But pay attention, this is only the preprocessor feature and it doesn't check for anything.