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Tcl Examples

ASN.1
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(Tcl) Create more Complex JSON Document

Sample code to create the following JSON document:

    {  
        "Title": "The Cuckoo's Calling",  
        "Author": "Robert Galbraith",  
        "Genre": "classic crime novel",  
        "Detail": {  
            "Publisher": "Little Brown",  
            "Publication_Year": 2013,  
            "ISBN-13": 9781408704004,  
            "Language": "English",  
            "Pages": 494  
        },  
        "Price": [  
            {  
                "type": "Hardcover",  
                "price": 16.65  
            },  
            {  
                "type": "Kindle Edition",  
                "price": 7.00  
            }  
        ]  
    }  

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

set json [new_CkJsonObject]

#  The only reason for failure in the following lines of code would be an out-of-memory condition..

#  An index value of -1 is used to append at the end.
set index -1

set success [CkJsonObject_AddStringAt $json -1 "Title" "The Cuckoo's Calling"]
set success [CkJsonObject_AddStringAt $json -1 "Author" "Robert Galbraith"]
set success [CkJsonObject_AddStringAt $json -1 "Genre" "classic crime novel"]

#  Let's create the Detail JSON object:
set success [CkJsonObject_AddObjectAt $json -1 "Detail"]
# detail is a CkJsonObject
set detail [CkJsonObject_ObjectAt $json [expr [CkJsonObject_get_Size $json] - 1]]
set success [CkJsonObject_AddStringAt $detail -1 "Publisher" "Little Brown"]
set success [CkJsonObject_AddIntAt $detail -1 "Publication_Year" 2013]
set success [CkJsonObject_AddNumberAt $detail -1 "ISBN-13" "9781408704004"]
set success [CkJsonObject_AddStringAt $detail -1 "Language" "English"]
set success [CkJsonObject_AddIntAt $detail -1 "Pages" 494]
delete_CkJsonObject $detail

#  Add the array for Price
set success [CkJsonObject_AddArrayAt $json -1 "Price"]
# aPrice is a CkJsonArray
set aPrice [CkJsonObject_ArrayAt $json [expr [CkJsonObject_get_Size $json] - 1]]

#  Entry entry in aPrice will be a JSON object.

#  Append a new/empty ojbect to the end of the aPrice array.
set success [CkJsonArray_AddObjectAt $aPrice -1]
#  Get the object that was just appended.
# priceObj is a CkJsonObject
set priceObj [CkJsonArray_ObjectAt $aPrice [expr [CkJsonArray_get_Size $aPrice] - 1]]
set success [CkJsonObject_AddStringAt $priceObj -1 "type" "Hardcover"]
set success [CkJsonObject_AddNumberAt $priceObj -1 "price" "16.65"]
delete_CkJsonObject $priceObj

set success [CkJsonArray_AddObjectAt $aPrice -1]
set priceObj [CkJsonArray_ObjectAt $aPrice [expr [CkJsonArray_get_Size $aPrice] - 1]]
set success [CkJsonObject_AddStringAt $priceObj -1 "type" "Kindle Edition"]
set success [CkJsonObject_AddNumberAt $priceObj -1 "price" "7.00"]
delete_CkJsonObject $priceObj

delete_CkJsonArray $aPrice

CkJsonObject_put_EmitCompact $json 0
puts [CkJsonObject_emit $json]

delete_CkJsonObject $json

 

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