Understanding Laravel Collections

A simple guide to familiarizing yourself with Laravel's collection methods.

The full video (including code examples) can be seen at https://www.youtube.com/watch?v=2aYlruGdo8g

Code can be viewed at https://github.com/tampabaylaravel/understanding-collections/tree/master/tests/Feature

Follow me on Twitter @GlennKimbleJr
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Transcript

1. Understanding
   Laravel Collections
   with Glenn Kimble Jr
   

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2. What are collections?
   

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3. What are collections?
   Collections are objects designed to wrap around an array and
   expose the operations that we can perform on that array as
   methods on the collection.
   Adam Wathan
   

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4. What are collections?
   Collections are objects designed to wrap around an array and
   expose the operations that we can perform on that array as
   methods on the collection.
   Adam Wathan
   

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5. ● array_reduce()
   ○ Reduce an array of items down to a single value.
   ● array_map()
   ○ Transform data.
   PHP: Array Functions
   Allow you to interact with and manipulate arrays in various ways.
   ● array_filter()
   ○ filter out items you don’t want.
   

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6. Why use them?
   

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7. Why use them?
   1. Method chaining.
   2. Over 100 helper methods.
   3. Eloquent already returns results to us as collections.
   

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8. Method Chaining
   

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9. Method Chaining
   

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10. Method Chaining
    

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11. Method Chaining: Helper Methods
    

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13. Use collections in place of arrays
    

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14. Use collections in place of arrays
    

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15. Use collections in place of arrays
    

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16. Use collections in place of arrays
    Implement the following:
    ● ArrayAccess
    ○ Interface to provide accessing objects as arrays.
    ● IteratorAggregate
    ○ Interface to create an external Iterator.
    ● Countable
    ○ Allows us to use php’s count() function.
    

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17. Code Examples
    https://github.com/tampabaylaravel/understanding-collections/tree/master/tests/Feature
    

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