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(Ruby) Modify Parts of JSON DocumentDemonstrates how to modify parts of a JSON document. This example uses the following JSON document: { "fruit": [ { "kind": "apple", "count": 24, "fresh": true, "extraInfo": null, "listA": [ "abc", 1, null, false ], "objectB": { "animal" : "monkey" } }, { "kind": "pear", "count": 18, "fresh": false, "extraInfo": null "listA": [ "xyz", 24, null, true ], "objectB": { "animal" : "lemur" } } ], "list" : [ "banana", 12, true, null, "orange", 12.5, { "ticker": "AAPL" }, [ 1, 2, 3, 4, 5 ] ], "alien" : true } Note: This example requires Chilkat v11.0.0 or greater.
require 'chilkat' success = false json = Chilkat::CkJsonObject.new() # Load the JSON from a file. success = json.LoadFile("qa_data/json/modifySample.json") if (success == false) print json.lastErrorText() + "\n"; exit end # This example will not check for errors (i.e. null / false / 0 return values)... # Get the "list" array: listA = Chilkat::CkJsonArray.new() json.ArrayOf2("list",listA) # Modify values in the list. # Change banana to plantain success = listA.SetStringAt(0,"plantain") # Change 12 to 24 success = listA.SetIntAt(1,24) # Change true to false success = listA.SetBoolAt(2,false) # Is the 3rd item null? bNull = listA.IsNullAt(3) # Change "orange" to 32. success = listA.SetIntAt(4,32) # Change 12.5 to 31.2 success = listA.SetNumberAt(5,"31.2") # Replace the { "ticker" : "AAPL" } object with { "ticker" : "GOOG" } # Do this by deleting, then inserting a new object at the same location. success = listA.DeleteAt(6) tickerObj = Chilkat::CkJsonObject.new() listA.AddObjectAt2(6,tickerObj) success = tickerObj.AppendString("ticker","GOOG") # Replace "[ 1, 2, 3, 4, 5 ]" with "[ "apple", 22, true, null, 1080.25 ]" success = listA.DeleteAt(7) aa = Chilkat::CkJsonArray.new() listA.AddArrayAt2(7,aa) success = aa.AddStringAt(-1,"apple") success = aa.AddIntAt(-1,22) success = aa.AddBoolAt(-1,true) success = aa.AddNullAt(-1) success = aa.AddNumberAt(-1,"1080.25") # Get the "fruit" array aFruit = Chilkat::CkJsonArray.new() json.ArrayAt2(0,aFruit) # Get the 1st element: appleObj = Chilkat::CkJsonObject.new() aFruit.ObjectAt2(0,appleObj) # Modify values by member name: success = appleObj.SetStringOf("fruit","fuji_apple") success = appleObj.SetIntOf("count",46) success = appleObj.SetBoolOf("fresh",false) success = appleObj.SetStringOf("extraInfo","developed by growers at the Tohoku Research Station in Fujisaki") # Modify values by index: pearObj = Chilkat::CkJsonObject.new() aFruit.ObjectAt2(1,pearObj) success = pearObj.SetStringAt(0,"bartlett_pear") success = pearObj.SetIntAt(1,12) success = pearObj.SetBoolAt(2,false) success = pearObj.SetStringAt(3,"harvested in late August to early September") json.put_EmitCompact(false) print json.emit() + "\n"; |
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