$$switch

Switch-case expression. Value is compared to each of the keys in cases and a matching key will result with its value, otherwise default value or null will be returned.

Usage

{
  "$$switch": /* value */,
  "cases": {
    /* "case_value": result_value */
  },
  "default": /* default value */
}

Returns

Same as default value or one of the cases values

Arguments

Argument	Type	Values	Required / Default Value	Description
Primary	string		Yes	Value to test
cases	object	A map of string to value	Yes
default			null	Fallback value in case no match to any key in cases

Examples

Input

Definition

Output

"B"

{ 
  "$$switch": "$", 
  "cases": {
    "a": 1,
    "B": 2,
    "c": 3
  }
}

2

"D"

{
  "$$switch": "$", 
  "cases": {
    "a": 1,
    "B": 2,
    "c": 3
  }
}

null

"D"

{ 
  "$$switch": "$", 
  "cases": {
    "a": 1,
    "B": 2,
    "c": 3
  }, 
  "default": 4
}

4

{
  "a": 1,
  "B": 2,
  "c": 3
}

{ 
  "$$switch": "B", 
  "cases": "$" 
}

2