Go

Eval JavaScript Returning String

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Demonstrates getting the completion value of a JavaScript that returns a string. Go

    success := false

    //  This example demonstrates getting the completion value of a script,
    //  where the last evaluated expression is a string.

    //  The Javascript run in this example is shown below.

    //  Load the JavaScript from a file.
    sbScript := chilkat.NewStringBuilder()
    success = sbScript.LoadFile("js_eval_return_string.js","utf-8")
    if success == false {
        fmt.Println(sbScript.LastErrorText())
        sbScript.DisposeStringBuilder()
        return
    }

    js := chilkat.NewJs()
    result := chilkat.NewJsonObject()

    //  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 a string.
    success = js.Eval(sbScript,result)
    if success == false {
        fmt.Println(js.LastErrorText())
        sbScript.DisposeStringBuilder()
        js.DisposeJs()
        result.DisposeJsonObject()
        return
    }

    result.SetEmitCompact(false)
    fmt.Println(*result.Emit())

    //  Output:

    //  {
    //    "type": "string",
    //    "value": "Ready for Chilkat.Js"
    //  }

    sbScript.DisposeStringBuilder()
    js.DisposeJs()
    result.DisposeJsonObject()

JavaScript

var status = "Ready";
var system = "Chilkat.Js";

// The last statement is an expression
status + " for " + system;