(Ruby) Eval JavaScript Returning String

See more JavaScript Examples

Note: This example requires Chilkat v11.4.0 or greater.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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::CkStringBuilder.new()
success = sbScript.LoadFile("js_eval_return_string.js","utf-8")
if (success == false)
    print sbScript.lastErrorText() + "\n";
    exit
end

js = Chilkat::CkJs.new()
result = Chilkat::CkJsonObject.new()

# 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)
    print sbScript.lastErrorText() + "\n";
    exit
end

result.put_EmitCompact(false)
print result.emit() + "\n";

# Output:

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

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

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