7 best practices for arrays in javascript
Tags: javascript, programming
Published: 2023-04-12 10:31:33

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Arrays are a fundamental data structure in JavaScript, and are used in nearly every application. But working with arrays can be messy and inefficient if you don't use the right methods and techniques. In this post, we'll explore some array methods and techniques that will help you write cleaner, more efficient code.

1. forEach : The Gentle Giant of Array Methods
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When it comes to iterating over an array, the forEach() method is the gentle giant. It quietly steps through each element in the array, without making a fuss. It doesn't care if you mutate the array or not. It just wants to be helpful.

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2. map : The Transformer
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The map() method transforms each element in an array into a new element. It's like a magical machine that takes in old junk and spits out shiny new things.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/5spe75i3xi6wtnn777y9.png)


3. filter : The Cleaner
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The filter() method is like a cleaning crew for your array. It filters out elements that don't belong, leaving behind only the good stuff. 
_**Bonus**_
some() method checks if at least one element in an array satisfies a condition and returns boolean value. **And**, find() method returns the first element in an array that satisfies a provided testing function. It returns **undefined** if no element satisfies the condition


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4. reduce : The Calculator
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The reduce() method is like a calculator for your array. It takes in an array of numbers and crunches them down into a single number.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/zxiysm8o570kjkm358q3.png)


5. spread operator : The Expander
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The spread operator is like a can of compressed air that expands when you use it. It expands an array into individual elements, making it easy to pass them around as separate arguments.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/g6z5xjppw8h5of0s6bnn.png)


6. destructuring : The Unpacker
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Destructuring is like a reverse present wrapper. It unpacks the contents of an array and assigns them to individual variables.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/fce2zad4phlf9ix8ipg7.png)


7. deduplication : The Remover
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Deduplication is the process of removing duplicate values from an array. The **Set** constructor is used to create a new set object, which automatically removes duplicates.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/m2mb8ml02rdvyz2610i6.png)

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####**Finally**
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