The average method can also be used with higher order messaging, which allows us to invoke collection methods and access object instance properties using PHP's ...
The avg method is a useful method for calculating the average of all items in the collection. The avg method defines an optional $key parameter, which can be ...
The median method can be used to get the median value of the collection; a $key may be specified to limit the calculation to nested property values.
The following code example shows how to use the min function when specifying a $key :
The sum is a simple method that returns the sum of all items in a collection. After the above code has executed, the $sum variable will contain the value 15 , ...
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