Json module

The Json module contains functions to manipulate JSON strings.

path_extract/2

Json.path_extract("{ \"firstName\": \"John\", \"lastName\": \"Doe\"}", "$.firstName") # "John"

Parameters:

• json the json string
• path the path

Returns the data at path in json.

See the JSONPath documentation for more information abouth paths.

path_match?/2

Json.path_match?("{\"1622541930\":{\"uco\":{\"eur\":0.176922,\"usd\":0.21642}}}", "$.*.uco.usd") # true
Json.path_match?("{\"1622541930\":{\"uco\":{\"eur\":0.176922,\"usd\":0.21642}}}", "$.*.uco.aud") # false

Parameters:

• json the json string
• path the path

Returns if there is a value at path in json.

See the JSONPath documentation for more information about paths.

to_string/1

Json.to_string(1)           # "1"
Json.to_string("str")       # "\"str\""
Json.to_string([1,2,3])     # "[1,2,3]"
Json.to_string(foo: "bar")  # "{\"foo\":\"bar\"}"

Parameters:

• any anything

Returns the Json representation of any.

parse/1

Json.parse("1")                     # "1"
Json.parse("\"str\"")               # "str"
Json.parse("[1,2,3]")               # [1,2,3]
Json.parse("{\"foo\":\"bar\"}")     # foo: "bar"

Parameters:

• json the json string

Returns the value represented by json.

is_valid?/1

Json.is_valid?("str")        # false
Json.is_valid?("\"str\"")    # true

Parameters:

• json the json string

Returns whether the string is valid JSON or not.