Explanation:The $map expression has the following syntax: { $map: { input: , as: , in: } } 8. In the vars assignment block, ________ refers to the value of an externally defined variable low .
A. “$$low”
B. “$$lowin”
C. “$$1”
D. None of the mentioned
Answer:A
Explanation:The $map expression has the following syntax: { $map: { input: , as: , in: } } 8. In the vars assignment block, ________ refers to the value of an externally defined variable low .
A. “$$low” B. “$$lowin” C. “$$1” D. None of the mentioned
Explanation:If low is not defined outside this $let expression block, the expression is invalid.