Summary of usage of collection class in Laravel (code)

Laravel's Collection class actually has many very practical methods, which are very useful for us when optimizing loops. Our goal is: no longer write foreach loops! This article shares with you a summary (code) of how to use the collection class in Laravel. The content is very detailed and has certain reference value. I hope it can help friends in need.

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 of

map and the application scenarios of map

#3. Calculate Github activity

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

In the previous example, we all An array for optimization and refactoring. In this section, we learn to use the

zip method to solve the problem of two arrays.

#6. Reduce to create lookup array In Laravel Collection, there is another very common method:

reduce

, 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.

##Or:

collect($employees)->pluck('email','name')

7. Calculate order summary

Processing orders When asking questions, you will encounter various summary problems, such as daily sales summary, daily supplier summary, etc. In this video, you will learn the black technology of the

sum method and some Common application scenarios of groupBy

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