82 Zeilen
3,1 KiB
Markdown
82 Zeilen
3,1 KiB
Markdown
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# Omnis Commands Cheat Sheet
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## Die 10 wichtigsten Befehle
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| # | Befehl | Was es tut | JS-Aequivalent |
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| 1 | `Calculate lX as expr` | Berechnung + Zuweisung | `let x = expr` |
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| 2 | `Do obj.$method()` | Methodenaufruf | `obj.method()` |
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| 3 | `If ... Else ... End If` | Bedingung | `if ... else ...` |
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| 4 | `For i from a to b step c` | Zaehlschleife | `for (let i=a; i<=b; i+=c)` |
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| 5 | `For each line in list` | Listen-Iteration | `for (const item of arr)` |
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| 6 | `While ... End While` | Bedingungsschleife | `while (...)` |
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| 7 | `Quit method lVal` | Methode beenden + Return | `return val` |
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| 8 | `OK message {text}` | Nachricht anzeigen | `alert(text)` |
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| 9 | `Switch ... Case ... End Switch` | Fallunterscheidung | `switch ... case` |
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| 10 | `Do inherited` | Super-Methode rufen | `super.method()` |
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## Variablen & Berechnung
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```omnis
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Calculate lName as "Harry" String zuweisen
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Calculate lSum as lA + lB Berechnen
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Calculate lText as con("Hallo ", lName) String verketten
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Calculate lUpper as upp(lName) Grossbuchstaben
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Calculate lLen as len(lName) String-Laenge
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Calculate lSub as mid(lName, 2, 3) Substring
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Calculate lPos as pos("r", lName) Zeichen finden
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```
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## Kontrollfluss
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```omnis
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If lAge >= 18 If lStatus = 'A' | lStatus = 'B'
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# erwachsen # A oder B
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Else If lAge >= 14 End If
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# jugendlich
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Else Switch lStatus
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# kind Case 'A'
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End If # aktiv
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Case 'I'
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While lX < 100 # inaktiv
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Calculate lX as lX + 1 Default
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End While # sonstiges
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End Switch
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For lI from 1 to 10 step 1
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# lI = 1, 2, 3, ...10
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End For
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```
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## Dialoge
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```omnis
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OK message {Fertig!} Info-Dialog
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Yes/No message {Loeschen?} Ja/Nein Dialog
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If flag true ... End If Ergebnis pruefen
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Prompt for input {Name?} lName Eingabe-Dialog
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No/Yes message {Abbrechen?} Nein/Ja (Default=Nein)
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```
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## Debugging
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```omnis
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Breakpoint Debugger oeffnen (= debugger; in JS)
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OK message {Debug: [lVar]} Quick-Debug mit Message
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Trace log {[lVar]} In Trace-Log schreiben
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```
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## SQL-Befehle (ueber Session/Statement)
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```omnis
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Do lSess.$logon(host, user, pw, 'sess') Returns #F Verbinden
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Do lStmt.$prepare('SELECT...WHERE id=:1') Returns #F Vorbereiten
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Do lStmt.$execute(lID) Returns #F Ausfuehren
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Do lStmt.$fetch(lList, kFetchAll) Returns #F Ergebnis holen
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Do lStmt.$execdirect('INSERT...') Returns #F Direkt ausfuehren
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```
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## Merkhilfe: Die Befehls-Familien
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```
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DATEN: Calculate, Do, Set current list
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FLUSS: If/Else/End If, For/End For, While/End While, Switch/Case/End Switch
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METHODE: Quit method, Do inherited, Quit all methods
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DIALOG: OK message, Yes/No message, Prompt for input
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FENSTER: Open window, Close window, Redraw, Enter data
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SQL: $logon, $prepare, $execute, $fetch, $execdirect
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```
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