Parameters and examples of JSON functions - CDN - Alibaba Cloud Documentation Center

Use these functions to encode dictionary objects into JSON strings and decode JSON strings back into dictionaries.

json_enc

Syntax	`json_enc(d)`
Description	Encodes a dictionary object into a JSON string.
Parameters	`d`: The dictionary object to encode.
Return value	A JSON-encoded string on success, or `false` on failure.

Example:

var_a = []
var_b = ['v1', 'v2']
set(var_a, 'k1', 'v1')
set(var_a, 'k2', var_b)
var_c = '{"k1":"v1","k2":["v1","v2"]}'
say(concat('json_enc=', json_enc(var_a)))
say(concat('json_dec=', get(json_dec(var_c), 'k1')))

Output:

json_enc={"k1":"v1","k2":["v1","v2"]}
json_dec=v1

json_dec

Syntax	`json_dec(s)`
Description	Decodes a JSON string into a dictionary.
Parameters	`s`: The JSON string to decode.
Return value	A dictionary on success, or `false` on failure.

Note

A numeric string such as "123" decodes into a variable of the number type. Before performing operations on the decoded value (such as getting a value), use the type function to check its type.

The following examples show two scenarios: decoding a numeric string and decoding a JSON object.

Example 1: Decoding a numeric string

var_c = '123'
type_var_c = type(json_dec(var_c))
if eq(type_var_c, 'table') {
  say(concat('json_dec=', get(json_dec(var_c), 'k1')))
} else {
  say(type_var_c)
}

Output:

number

Example 2: Decoding a JSON object

var_c = '{"k1":"v1","k2":["v1","v2"]}'
type_var_c = type(json_dec(var_c))
if eq(type_var_c, 'table') {
  say(concat('json_dec=', get(json_dec(var_c), 'k1')))
} else {
  say(type_var_c)
}

Output:

json_dec=v1