> we have `substr` and `slice` as well that do slightly different things with
> slightly different names and there are valid use cases/simplification for
> both string methods
substr is in Annex B for web compatibility.
The specification notes:
All of the language features and behaviours specified in this annex have one or
more undesirable characteristics and in the absence of legacy usage would be
removed from this specification
And:
These features are not considered part of the core ECMAScript language.
Programmers should not use or assume the existence of these features and
behaviours when writing new ECMAScript code. ECMAScript implementations are
discouraged from implementing these features unless the implementation is part
of a web browser or is required to run the same legacy ECMAScript code that web
browsers encounter.
Our XS engine for emebdded followed this guidance: we didn't implement strstr
for a long time. Alas, developers from the web are so accustomed to having it
that we eventually gave in and provided it. Some conformance details here:
https://github.com/Moddable-OpenSource/moddable/blob/public/documentation/xs/XS%20Differences.md#conformance
<https://github.com/Moddable-OpenSource/moddable/blob/public/documentation/xs/XS%20Differences.md#conformance>
-- Peter
> On Oct 12, 2018, at 9:54 AM, Andrea Giammarchi <[email protected]
> <mailto:[email protected]>> wrote:
>
> I think having both `set` and `put` would be actually awesome, we have
> `substr` and `slice` as well that do slightly different things with slightly
> different names and there are valid use cases/simplification for both string
> methods.
>
> AFAIK Allen mentioned it'd be awkward to have put too, but I hope others
> agree it would solve most issues developers have with constants and one/off
> WeakMap setups which is the most common use case with weak maps, weak sets,
> and not weak counterparts.
>
> Regards
>
> On Fri, Oct 12, 2018 at 3:57 AM Jack Lu <[email protected]
> <mailto:[email protected]>> wrote:
> It makes sense for a `put` to return the value, but it's awkward to say `put`
> when you want to get a value.
> And I'm fond of your proposal of `put`.
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