Add comment formatting #319
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lib/test.js
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| var that = this; | ||
| var keys = Object.keys(arguments) | ||
| var msg = keys.length > 1 ? format.apply(null, arguments) : arguments[keys[0]]; |
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- just
arguments.lengthis sufficient, no need toObject.keys(also that makes it require ES5, which this lib does not) - It seems like this might be easier to just
format.apply(null, arguments)in every case?
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Calling format.apply in all cases changes the behavior, e.g. test.comment({answer:42}) will print {answer:42} whereas the current code prints [object Object]. I'm happy to make the change, as I think that's preferable behavior, but it's up to you.
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Ah, interesting. We definitely want to avoid breaking changes.
Either way, I think perhaps the ES3 equivalent of format.apply(null, Array.prototype.map.call(arguments, String)) might be the semantic we want here? What's the use case for supporting format's behavior with non-strings?
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Use case would be, e.g., console.log-style debugging where you want to log object contents. With the change as it stands you can do t.cmt('%j', obj). Formatting everything, you could do t.cmt(obj).
Doesn't sound like 5 fewer characters is worth the risk of breaking older code tho.
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@ljharb Pushed fixes. |
lib/test.js
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| @@ -106,8 +107,11 @@ Test.prototype.test = function (name, opts, cb) { | |||
| }); | |||
| }; | |||
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| Test.prototype.comment = function (msg) { | |||
| Test.prototype.comment = function () { | |||
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0x1mason
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| @@ -108,6 +109,12 @@ Test.prototype.test = function (name, opts, cb) { | |||
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| Test.prototype.comment = function (msg) { | |||
| var that = this; | |||
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| // Previous behavior involved `toString` calls on objects, i.e. emitting `[object Object]`. | |||
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@ljharb Added a comment to explain the conditional
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sadly I still don't think this is sufficient - previously, multiple arguments were ignored, and I still might have done arr.forEach(t.comment) for example, and relied on the stringification despite passing 3 arguments. I think that the first argument must never be stringified to avoid a breaking change.
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Are you suggesting something like this?
if args[0] is a string and args.len > 1:
expand the string
else:
ignore
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Also, what about a new function ,eg format, comments, etc
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No, I'm suggesting always stringifying the first argument no matter what, and not adding the ability to implicitly log object contents.
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This remains an issue - to restate, I think that we need something like format.apply(null, Array.prototype.map.call(arguments, String)) to ensure that everything is always stringified.
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ljharb
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semver-minor: new stuff
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This PR allows for
util.formatstyle comment formatting