Summary of usage of collection class in Laravel (code)
1. Sum to find the sum of prices
We will learn flatMap map sum and other very practical Method
##
collect($arr)->pluck('order_products.*.price')->flatten(1)->sum();2. Formatting the boarding gate
I hope to deepen my understanding ofmap and the application scenarios of map
It is a mechanism to obtain data through API and convert the data into scores. We will first try the
foreach method, and then use Laravel's Collection to optimize and reconstructhttps: //api.github.com/users/...
##General solution:
##collection refactoring:
4. Convert comment format
The implode method in
Laravel Collection is actually It is very useful in certain scenarios. Combined with map, we can customize the format of each element with a high degree of freedom. This video is about converting the normal format to the Markdown format.
##5. Calculate monthly turnover
zip method to solve the problem of two arrays.
#6. Reduce to create lookup array
In Laravel Collection, there is another very common method:
, this is very useful when we create a lookup array, so that we can use Collection to reconstruct a complex array and turn it into a simple key value lookup array.
collect($employees)->pluck('email','name')
7. Calculate order summary
sum method and some Common application scenarios of groupBy
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