JavaScript ~~

JavaScript is loaded with tiny syntax tricks to accomplish useful effects. For example, explore any codebase to see !! being used to convert a value to a boolean value. Have you seen ~~ before? Let’s have a look at what it does!

We can employ ~~ to trigger a Math.floor operation with those special characters:

~~9.1 // 9
~~9.99 // 9
~~0.01 // 0

It’s interesting that JavaScript uses ~~ to alias Math.floor, but I’d much prefer devs I work with use the text Math.

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