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Our favorite javascript one-liners

J. on January 04, 2022

These are our favorite one-liners that we've used and forgot existed because they work so well 😁. Generate a random hex color const ...
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lionel-rowe •

Math.floor(Math.random() * 0xffffff) gives numbers in the range 0..0xfffffe, not 0..0xffffff. You want Math.floor(Math.random() * (0xffffff + 1)), i.e. Math.floor(Math.random() * 0x1000000) 😉

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J. Everly Health •

this guy hexes...

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Jon Randy 🎖️ • • Edited

Reverse string can be shortened to:

const reverseString = str => [...str].reverse().join()
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Your version also has an issue with unicode, which the above function fixes:

"🤓🚀🐍".split('').reverse().join('')   //  "\udc0d🚀🔓\ud83e"

[..."🤓🚀🐍"].reverse().join('')   // "🐍🚀🤓"
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Filtering falsy values can also be shortened:

const removeFalsyValues = arr => arr.filter(x=>x)
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J. Everly Health •

niiiiiice

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Hrushal •

Cool really helped me!

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J. Everly Health •

sweet! thanks for the feedback!

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J. Everly Health •

🔥

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Posandu •

Cheers!

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flyingCrp •

JavaScript's magic

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Sergio Martín •

Filtering falsy values can also be done like...

const removeFalsyValues = arr => arr.filter(Boolean)

Thanks for your good article!

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J. Everly Health •

we actually had it this way originally 😄. both ways work, i think the updated one may save a character or two. i'll add a note, so that both are covered though!

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OriCohen05 •

Really cool
Thanks!

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