And ‘&&’

The binary operator ‘&&’ is used to perform a logical AND operation between two boolean expressions in JsonQL. It returns true when both operands evaluate to true, and false otherwise.

Operator Priority: 700

Operator Operands

• Operand 1:

  • Type: any valid JsonQL expression (including invalid path).

  • Description: Any valid JsonQL expression.

• Operand 2:

  • Type: any valid JsonQL expression (including invalid path).

  • Description: Any valid JsonQL expression.

Evaluation Rules

The && operator follows these evaluation rules:

• True && True: Returns true when both operands evaluate to true

• True && False: Returns false

• False && True: Returns false

• False && False: Returns false

• Invalid paths: When an operand is an invalid path, it is treated as false

• Null values: When an operand is null, it is treated as false

• Non-boolean values: Non-boolean values (like integers, strings) are treated as false

Short-circuit Evaluation

The && operator uses short-circuit evaluation:

• If the first operand evaluates to false, the second operand is not evaluated and the result is false

• Both operands are only evaluated when the first operand is true

Examples

{
  "Comment_Operator_&&_1": "(invalid.path && Int1==15) is evaluated to false",
  "Operator_&&_1": "$value((invalid.path && Int1==15) == false)",

  "Comment_Operator_&&_2": "(true && invalid.path) is evaluated to false",
  "Operator_&&_2": "$value((true && invalid.path) == false)",

  "Comment_Operator_&&_3": "(NullValue && Int1==15) is evaluated to false",
  "Operator_&&_3": "$value((NullValue && Int1==15) == false)",

  "Comment_Operator_&&_4": "(Int1==15 && NullValue) is evaluated to false",
  "Operator_&&_4": "$value((Int1==15 && NullValue) == false)",

  "Comment_Operator_&&_5": "(e.InvalidBooleanPath && 1 == 1) is evaluated to false for all employees",
  "Operator_&&_5": "$value(Count(Companies.Select(c => c.Employees.Where(e => e.InvalidBooleanPath && 1 == 1))) == 0)",

  "Operator_&&_6": "$value(Companies.Select(c => c.Employees.Where(e => e.Age > 40 && e.Salary > 100000)).First())",

  "Operator_&&_7": "$value((TrueValue && Int1==15) == true)",
  "Operator_&&_8": "$value((FalseValue && Int1==15) == false)",
  "Operator_&&_9": "$value((Int1==15 && FalseValue) == false)",
  "Operator_&&_10": "$value((Int1==16 && FalseValue) == false)"
}