jeena/en.javascript.info
1
0
Fork 0
Code Issues Pull requests Projects Packages Wiki Activity Actions

Merge pull request #20 from wpears/patch-1

Browse source 
Fix typo and formatting
This commit is contained in:
Ilya Kantor 2017-06-10 00:33:55 +03:00 • committed by GitHub
commit e4213ea5d5
1 changed files with 4 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

7
1-js/05-data-types/08-keys-values-entries/article.md
View file

@ -1,7 +1,7 @@
# Object.keys, values, entries
Let's step away from the indivitual data structures and talk about the iterations over them.
Let's step away from the individual data structures and talk about the iterations over them.
In the previous chapter we saw methods `map.keys()`, `map.values()`, `map.entries()`.
@ -63,8 +63,9 @@ for(let value of Object.values(user)) {
}
```
```smart header="`Object.keys/values/entries` ignore symbolic properties"
Just like `for..in` loop, these methods ignore properties that use `Symbol(...)` as keys.
## Object.keys/values/entries ignore symbolic properties
Just like a `for..in` loop, these methods ignore properties that use `Symbol(...)` as keys.
Usually that's convenient. But if we want symbolic keys too, then there's a separate method [Object.getOwnPropertySymbols](mdn:js/Object/getOwnPropertySymbols) that returns an array of only symbolic keys. Also, the method [Reflect.ownKeys(obj)](mdn:js/Reflect/ownKeys) returns *all* keys.
```