CkPython

Call a JavaScript Function Returning an Array

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Demonstrates how to call a JavaScript function that returns an array. CkPython

import sys
import chilkat

success = False

# ----------------------------------------------------------------------------------
# The Javascript functions called in this example are shown at the bottom of this page.
# -----------------------------------------------------------------------------------

sbScript = chilkat.CkStringBuilder()
success = sbScript.LoadFile("js_function_returning_array.js","utf-8")
if (success == False):
    print(sbScript.lastErrorText())
    sys.exit()

js = chilkat.CkJs()

result = chilkat.CkJsonObject()
result.put_EmitCompact(False)

# Call Eval to add the function to the context's global object
success = js.Eval(sbScript,result)
if (success == False):
    # Examine the result for an exception.
    print(result.emit())

    # Also examine the LastErrorText.
    print(js.lastErrorText())
    sys.exit()

# ------------------------------------------------------------------------------
# Call each function

funcCall = chilkat.CkJsonObject()

# Create JSON specifying the function name and arguments
# The function has no arguments, so we only specify the name.

funcCall.UpdateString("name","getDays")

success = js.CallFunction(funcCall,result)
if (success == False):
    # Examine the result for an exception.
    print(result.emit())

    # Also examine the LastErrorText.
    print(js.lastErrorText())
    sys.exit()

print(result.emit())

# Output:
# {
#   "type": "array",
#   "value": [
#     "Monday",
#     "Tuesday",
#     "Wednesday",
#     "Thursday",
#     "Friday"
#   ]
# }

# Access each array value..
count = result.SizeOfArray("value")
i = 0
while i < count :
    result.put_I(i)
    print(result.stringOf("value[i]"))
    i = i + 1

# ------------------------------------------------------------------------------
# Call the getRange(start,end) function

funcCall.Clear()
funcCall.UpdateString("name","getRange")
funcCall.UpdateInt("args[0]",14)
funcCall.UpdateInt("args[1]",21)
success = js.CallFunction(funcCall,result)
print(result.emit())

# Output:
# {
#   "type": "array",
#   "value": [
#     14,
#     15,
#     16,
#     17,
#     18,
#     19,
#     20,
#     21
#   ]
# }

count = result.SizeOfArray("value")
i = 0
while i < count :
    result.put_I(i)
    print(str(result.IntOf("value[i]")))
    i = i + 1

# ------------------------------------------------------------------------------
# Call the getEmployees() function

funcCall.Clear()
funcCall.UpdateString("name","getEmployees")
success = js.CallFunction(funcCall,result)
print(result.emit())

# Output:
# {
#   "type": "array",
#   "value": [
#     {
#       "id": 101,
#       "name": "Alice",
#       "role": "Dev"
#     },
#     {
#       "id": 102,
#       "name": "Bob",
#       "role": "Manager"
#     }
#   ]
# }

count = result.SizeOfArray("value")
i = 0
while i < count :
    result.put_I(i)
    print("name: " + result.stringOf("value[i].name"))
    print("role: " + result.stringOf("value[i].role"))
    print("id: " + str(result.IntOf("value[i].id")))
    print("")
    i = i + 1