Extend Object Dereferencing
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Don't you just mean the following:
const {abc, xyz, qnc: {awj}} = obj;
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If your intent is to say
const a = {b: e.b, c: e.c, d: e.d};
then the reception to such functionality (often referred to as "picking") on this list has been decidedly lukewarm, although I remain mystified why, since IMHO it is a common use case and syntactically straightforward. FWIW the currently proposed syntax is
const a = { {b, c, d} = e };
which allows combining properties from more than one object, as in
const a = { {b, c, d} = e, {g, h, i} = k };
which is equivalent to
const a = {b: e.b, c: e.c, d: e.d, g: k.g, h: k.h, i: k.i};
Bob
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On Tue, Oct 24, 2017 at 7:51 PM, Sebastian Malton <sebastian at malton.name> wrote:
Currently you can do the following
const {abc, xyz, qnc} = obj;
However if you want to go more than one level deep then you have to do it again for each level.
You don't have to do it again, you can nest patterns as deeply as you like. In this case:
const {abc, xyz, qnc: {awj}} = obj;
```j
E.g.: http://jsfiddle.net/yyud2gvg/
```js
const obj = {
abc: 1,
xyz: 2,
qnc: {
awj: 3
}
};
const {abc, xyz, qnc: {awj}} = obj;
console.log(abc, xyz, awj); // 1, 2, 3
```js
-- T.J. CrowderAn HTML attachment was scrubbed... URL: esdiscuss/attachments/20171025/1f319185/attachment-0001
On Wed, Oct 25, 2017 at 1:15 PM, Sebastian Malton <sebastian at malton.name> wrote:
I didn't mean that part when I said multiple levels. I meant the following
const abc = { { bcd, cde, efg: {qnc} } = obj};
I was responding to your initial assertion in your first message, which didn't show that form. It just said
Currently you can do the following
const {abc, xyz, qnc} = obj;However if you want to go more than one level deep then you have to do it
again for each level.
...
I therefore propose the ability to do the following
const {abc, xyz, qnc.awj} = obj;And this would create the variables 'abc'', 'xyz', 'awj' with the values from obj.
I was pointing out how you can do that without having to "do it again."
Perhaps you could clarify what you're actually proposing. Your first
message talked about individual variables for the parts of obj;
subsequently you seemed to be talking about creating a new object
(combining object initializers with destructuring)...?
-- T.J. Crowder
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