How to compare two objects?

Gorlath · April 2016

So let's say we have object "foo":

<<set $foo to { favouriteGame : "Asteroids" }>>

And we also have an object "bar":

<<set $bar to { favouriteGame : "Asteroids" }>>

Is there a function or method (like .equals()?) that I can use that compares two objects and returns true/false based on whether or not their contents are equal?
If there is and I just couldn't find it, does it compare sub-objects, too?

TheMadExile · April 2016

Not built in, no.

If you actually need such a feature, then you could download the production build of Underscore—it's the "Production Version (x.x.x)" link under the downloads section.

Paste the content of that into your Story JavaScript, with one minor change required to make it work. At the very end of the library, just before the source map comment at the end of a very long line, you'll find a call() method invocation which you need to modify.

FIND:

.call(this);
//# sourceMappingURL=underscore-min.map

REPLACE WITH:

.call(window);
//# sourceMappingURL=underscore-min.map

Once done, you should be able to use any of the Underscore library methods. The one you're looking for is named isEqual. For example:

/* Just print the conditional result (true or false). */
Objects are equivalent: <<print _.isEqual($foo, $bar)>>

/* Within an <<if>>. */
Objects <<if _.isEqual($foo, $bar)>>are<<else>>are NOT<</if>> equivalent.

Gorlath · April 2016

Thanks a lot, this is exactly what I was looking for.

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How to compare two objects?

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