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Fix spelling mistake 'substract'

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Sean Wall 2017-08-09 08:40:00 -04:00 • committed by GitHub
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1-js/04-object-basics/05-object-toprimitive/article.md
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@ -1,7 +1,7 @@
# Object to primitive conversion
What happens when objects are added `obj1 + obj2`, substracted `obj1 - obj2` or printed using `alert(obj)`?
What happens when objects are added `obj1 + obj2`, subtracted `obj1 - obj2` or printed using `alert(obj)`?
There are special methods in objects that do the conversion.
@ -11,7 +11,7 @@ In the chapter <info:type-conversions> we've seen the rules for numeric, string
For objects, there's no to-boolean conversion, because all objects are `true` in a boolean context. So there are only string and numeric conversions.
The numeric conversion happens when we substract objects or apply mathematical functions. For instance, `Date` objects (to be covered in the chapter <info:date>) can be substracted, and the result of `date1 - date2` is the time difference between two dates.
The numeric conversion happens when we subtract objects or apply mathematical functions. For instance, `Date` objects (to be covered in the chapter <info:date>) can be subtracted, and the result of `date1 - date2` is the time difference between two dates.
As for the string conversion -- it usually happens when we output an object like `alert(obj)` and in similar contexts.