Ruby

JSON: Access Array Values

See more JSON Examples

Demonstrates how to access values in a JSON array. Ruby

require 'chilkat'

success = false

json = Chilkat::CkJsonObject.new()

jsonStr = "{ \"id\": 1, \"name\": \"A green door\", \"tags\": [\"home\", 22, \"green\"], \"price\": 125 }"

success = json.Load(jsonStr)
if (success != true)
    print json.lastErrorText() + "\n";
    exit
end

# Get the "tags" array, which contains "home", 22, "green"
# tagsArray is a CkJsonArray
tagsArray = json.ArrayOf("tags")
if (json.get_LastMethodSuccess() == false)
    print "tags member not found." + "\n";
    exit
end

# Get the value at each array index. 
# Output will be:
# [0] = home
# [0] as integer = 0
# [1] = 22
# [1] as integer = 22
# [2] = green
# [2] as integer = 0

arraySize = tagsArray.get_Size()

for i in 0 .. arraySize - 1

    sValue = tagsArray.stringAt(i)

    print "[" + i.to_s() + "] = " + sValue + "\n";

    iValue = tagsArray.IntAt(i)
    print "[" + i.to_s() + "] as integer = " + iValue.to_s() + "\n";

end

# Note: The StringAt method returns the value as a string regardless of the type.

# The IntAt method returns the value as an integer.  If the value does not convert to 
# an integer, then 0 is returned