Ruby

Find and Delete Object from JSON Array

See more JSON Examples

Demonstrates how to find an delete an object from a JSON array of objects. Ruby

require 'chilkat'

success = false

# This example will delete the "Pasta" category object from Menu B.

# {
#   "menus": [
#     {
#       "name": "Menu A",
#       "categories": [
# 			{
# 			"name": "Kebabs",
# 			"description": "blah blah blah"
# 			},
# 			{
# 			"name": "Burgers",
# 			"description": "blah blah blah"
# 			},
# 			{
# 			"name": "Pasta",
# 			"description": "blah blah blah"
# 			},
# 			{
# 			"name": "Appetizers",
# 			"description": "blah blah blah"
# 			}
# 		]
# 	},
#     {
#       "name": "Menu B",
#       "categories": [
# 			{
# 			"name": "Kebabs",
# 			"description": "blah blah blah"
# 			},
# 			{
# 			"name": "Burgers",
# 			"description": "blah blah blah"
# 			},
# 			{
# 			"name": "Pasta",
# 			"description": "blah blah blah"
# 			},
# 			{
# 			"name": "Appetizers",
# 			"description": "blah blah blah"
# 			}
# 		]
# 	  }
# 	]
# }

json = Chilkat::CkJsonObject.new()
success = json.LoadFile("qa_data/json/menus.json")
if (success == false)
    print json.lastErrorText() + "\n";
    exit
end

# Find Menu B.
# menu is a CkJsonObject
menu = json.FindRecord("menus","name","Menu B",true)
# assume menu is found..

# Get the categories array, and then find the index of the "Pasta" menu category.
# catArr is a CkJsonArray
catArr = menu.ArrayOf("categories")
# Assume it is found..

# Find the object where the name of the JSON member is "name", and the value is "Pasta"
index = catArr.FindObject("name","Pasta",true)
if (index < 0)
    print "Pasta not found." + "\n";
else

    # Delete the "Pasta" category record from Menu B
    success = catArr.DeleteAt(index)
    # Assume OK..
end

# Examine the JSON to see if it worked as expected..
json.put_EmitCompact(false)
print json.emit() + "\n";