Explanation:$let also returns the result of the expression. 7. ________ applies an expression to each item in an array and returns an array with the applied results.
A. $map
B. $geo
C. $geoRear
D. None of the mentioned
Answer:A
Explanation:$let also returns the result of the expression. 7. ________ applies an expression to each item in an array and returns an array with the applied results.
A. $map B. $geo C. $geoRear D. None of the mentioned
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 .