# Ternary-based pattern matching in JS Folks are jealous of other programming languages having this kind of pattern matching abilities : kotlin fun compareNumbers( a: Int, b: Int ) = when { a > b -> "A is greater than B" b > a -> "B is greater than A" else -> "A and B are equal" } But, so do we : typescript const compareNumbers = ( a: number, b: number ) => a > b ? 'A is greater than B' : b > a ? 'B is greater than A' : 'A and B are equal'; And this example is at identical character count btw. For example, I use it here [https://git.kaki87.net/KaKi87/dynapt/src/commit/9c89046de317295d7cd2e20e96b1a877a7ccfc72/src/updatePackages.js#L42-L44] in dynapt(1) : javascript url = app.url ? app.url : app.github ? `https://api.github.com/repos/$%7Bapp.github.repo%7D/releases/latest` : undefined To define an app download url that is either already provided if arbitrary, or requires being generated if from a GitHub / string. I use it again in the same file a little lower [https://git.kaki87.net/KaKi87/dynapt/src/commit/9c89046de317295d7cd2e20e96b1a877a7ccfc72/src/updatePackages.js#L64-L66] : javascript isUnmodified = app.url ? response.status === 304 : app.github ? response.status === 304 || cache[app.id]?.id === response.data['id'] : undefined; To determine whethere the download file from the abovementioned URL is modified or not, which works a little differently for GitHub because of its API. In another project that uses Discord.JS and TypeScript, I use this syntax for a conditional return type : typescript createSelectRow = ({ type // ... }: { type: type, // ... }) : type extends 'channel' ? ActionRowBuilder : type extends 'role' ? ActionRowBuilder : type extends 'user' ? ActionRowBuilder : ActionRowBuilder => { // ... } Etc. — (1) dynapt is a dynamic APT repository. More information about that project here [https://gist.github.com/KaKi87/f620788e9901abbfef4978eb7ad358b4].