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

map 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

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

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')

sum method and some Common application scenarios of groupBy

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