Snippets

These are a collection of tips and tricks you can use to improve the performance and readability of your code.

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JavaScript

The exponentiation operator

If you keep seeing stars in JavaScript, it’s probably someone trying to raise a number to the power of another number.

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JavaScript

Merging arrays

There are several ways to concatenate in JavaScript. We can pick the one that is most readable in each situation.

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JavaScript

Flattening nested arrays

We can un-nest arrays with a native function now. We can also define how many levels of nesting we want to take out, to a maximum of “all levels”.

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JavaScript

Shuffling arrays

With the Fisher-Yates algorithm, we can shuffle an array with true randomness. The likelihood of two shuffles giving the same result is minimal.

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JavaScript

Inverting Boolean functions

We can create a helper function that makes functions return their Boolean opposite. This can be useful in the shorthand syntax for array methods.

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JavaScript

Splitting strings by lengths

Instead of splitting strings at sequences of characters, we can split them into substrings of equal length by using a regular expression.

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JavaScript

Destructuring values returned by functions

By destructuring the return value of a function, we can take out only the values we need without having to assign the result to an object first.

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JavaScript

Filtering falsy values from arrays

To filter all falsy values from arrays, all we need to do is pass the Boolean constructor to the filter function.

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