Does Javascript/ES8 have shorthand argument names, like Swift?
eg. arr.sort { $0.name > $1.name }
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3There's no such thing as ES8. If you mean modern ES editions, they are covered by 'Javascript', and proposals are referred as ES.next. JSX tag looks irrelevant here, and I would suggest to add Swift tag since it's essential for understanding the main point. – Estus Flask Jun 15 '17 at 09:05
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Btw, [that's not a usable comparison function anyway](https://stackoverflow.com/q/24080785/1048572) – Bergi Jun 15 '17 at 10:52
2 Answers
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There are no shorthand arguments in Javascript. The closest alternatives are arguments and ES6 rest parameter.
function fn(param1, param2) {
const $ = arguments;
// by name
console.log(param1, param2);
// by order
console.log($[0], $[1]);
}
Rest parameter it is more consistent than arguments, the latter isn't supported in arrow functions:
const fn = (...$) => {
// by name
let [param1, param2] = $;
console.log(param1, param2);
// by order
console.log($[0], $[1]);
}
Notice that $ parameter name is used to draw an analogy to Swift. It is not recommended to use $ name in practice because it may be confused with conventional jQuery $ variable. The conventional meaningful name for rest parameter that includes all arguments is args.
Estus Flask
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I would change `...$` to something like `...args` makes it easier to read. Otherwise, great answer! – Mr. Baudin Jun 15 '17 at 09:12
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`let { param1, param2 } = $;` should be `let [ param1, param2 ] = $` because `rest` operator returns an `Array`. But the point is: `OP` was about shorthand arguments not something similar. – Hitmands Jun 15 '17 at 09:14
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@Mr.Baudin Thanks. $ is used solely to draw an analogy with Swift. `args` is by far more conventional and convenient. – Estus Flask Jun 15 '17 at 09:16
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@estus I understand and you are right ofc. Just wanted to add the comment to give a more "javascripty" way of naming the parameter. "I would change" was not directed to your answer so much as to the general idea of the solution. - I should have written a better comment. Great answer and sorry for the mixup. – Mr. Baudin Jun 15 '17 at 09:19
