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Ilya Kantor 2019-03-02 23:31:11 +03:00
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1-js/06-advanced-functions/03-closure/article.md
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@ -275,7 +275,7 @@ In this example `count` is found on step `2`. When an outer variable is modifie
Here are two questions to consider:
1. Can we somehow reset the `counter` from the code that doesn't belong to `makeCounter`? E.g. after `alert` calls in the example above.
1. Can we somehow reset the counter `count` from the code that doesn't belong to `makeCounter`? E.g. after `alert` calls in the example above.
2. If we call `makeCounter()` multiple times -- it returns many `counter` functions. Are they independent or do they share the same `count`?
Try to answer them before you continue reading.
@ -286,8 +286,8 @@ All done?
Okay, let's go over the answers.
1. There is no way. The `counter` is a local function variable, we can't access it from the outside.
2. For every call to `makeCounter()` a new function Lexical Environment is created, with its own `counter`. So the resulting `counter` functions are independent.
1. There is no way: `count` is a local function variable, we can't access it from the outside.
2. For every call to `makeCounter()` a new function Lexical Environment is created, with its own `count`. So the resulting `counter` functions are independent.
Here's the demo: