VBScript

Eval JavaScript Returning Int

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Demonstrates getting the completion value of a JavaScript that returns an integer. VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

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.
set sbScript = CreateObject("Chilkat.StringBuilder")
success = sbScript.LoadFile("js_eval_return_int.js","utf-8")
If (success = 0) Then
    outFile.WriteLine(sbScript.LastErrorText)
    WScript.Quit
End If

set js = CreateObject("Chilkat.Js")
set result = CreateObject("Chilkat.JsonObject")

' 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
    outFile.WriteLine(sbScript.LastErrorText)
    WScript.Quit
End If

result.EmitCompact = 0
outFile.WriteLine(result.Emit())

' Output:

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

outFile.Close