Visual Basic 6.0

Eval JavaScript Returning Int

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Demonstrates getting the completion value of a JavaScript that returns an integer. Visual Basic 6.0

Dim success As Long
success = 0

'  This example demonstrates getting the completion value of a script,
'  where the last evaluated expression is an integer.

'  The Javascript run in this example is shown below.

'  Load the JavaScript from a file.
Dim sbScript As New ChilkatStringBuilder
success = sbScript.LoadFile("js_eval_return_int.js","utf-8")
If (success = 0) Then
    Debug.Print sbScript.LastErrorText
    Exit Sub
End If

Dim js As New ChilkatJs
Dim result As New ChilkatJsonObject

'  Run the JavaScript
'  Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
'  In this case, the last evaluated expression is an int.
success = js.Eval(sbScript,result)
If (success = 0) Then
    Debug.Print sbScript.LastErrorText
    Exit Sub
End If

result.EmitCompact = 0
Debug.Print result.Emit()

'  Output:

'  {
'    "type": "int",
'    "value": 42
'  }

JavaScript

const base = 10;
const multiplier = 4;
const offset = 2;

// The last line is a calculation resulting in an integer
// Returns 42.
(base * multiplier) + offset;