It's about the value of the property to be added, nothing to do with the name
of the property. It should discard properties whose value are null(but this
behavior is not always desired, so a different syntax for these properties
should be added).
```
On nov. 28 2017, at 8:33 pm, Sebastian Malton <sebast...@malton.name> wrote:
I am sort of confused about what you are asking, is the check about the
property name or the current value of the property?
Sebastian Malton
From: rodrigocarra...@outlook.com
Sent: November 28, 2017 8:30 PM
To: es-discuss@mozilla.org
Subject: A way to prevent properties to be added to an object if they are null
or undefined.
A way to prevent properties to be added to an object if they are null or
undefined.
Currently this can be accomplished in many ways:
With an if:
```js
function foo(couldBeNull){
let ret = {}
if(couldBeNull){
ret.couldBeNull<http://ret.couldBeNull> = couldBeNull
}
return ret
}
```
With ternary (kind of gross)
```js
function foo(couldBeNull){
let ret = {}
couldBeNull ? (ret.couldBeNull<http://ret.couldBeNull> = couldBeNull) : null
return ret
}
```
Also gross
```js
function foo(couldBeNull){
let ret = {}
couldBeNull && (ret.couldBeNull<http://ret.couldBeNull> = couldBeNull)
return ret
}
```
A bit hard to read:
```js
function foo(couldBeNull){
let ret = {
...({couldBeNull} : {})
}
return ret
}
```
Requires importing a lib or writing the function by yourself. Also it has to
iterate over all values
```js
function foo(couldBeNull){
let ret = {
couldBeNull
}
ret = removeEmptyValues(ret) // imported from some library
return ret
}
```
Wouldn't it be better something like this?:
```js
function foo(couldBeNull){
let ret = {
couldBeNull?
}
return ret
}
```
Or if you want to set other property name
```js
function foo(couldBeNull){
let ret = {
bar ?: couldBeNull // bar is not added if couldBeNull is null or undefined
}
return ret
}
```
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