Merge branch 'en' of https://github.com/iliakan/javascript-tutorial into en

Author: iliakan

1-js/07-object-oriented-programming/01-property-descriptors/article.md

@@ -68,7 +68,7 @@ Object.defineProperty(obj, propertyName, descriptor)
 `descriptor`
 : Property descriptor to apply.
 
-If the property exist, it updates its flags, otherwise, it creates the property with the given value and flags. Please note, that if a flag is not supplied, it is assumed `false`.
+If the property exists, `defineProperty` updates its flags. Otherwise, it creates the property with the given value and flags; in that case, if a flag is not supplied, it is assumed `false`.
 
 For instance, here a property `name` is created with all falsy flags:
 
@@ -96,7 +96,7 @@ alert( JSON.stringify(descriptor, null, 2 ) );
  */
 ```
 
-Compare it with "normally created" user.name above: now all flags are falsy. If that's not what we want then we'd better to set them to `true` in the `descriptor`.
+Compare it with "normally created" `user.name` above: now all flags are falsy. If that's not what we want then we'd better set them to `true` in `descriptor`.
 
 Now let's see effects of the flags by example.
 
@@ -209,7 +209,7 @@ Math.PI = 3; // Error
 // delete Math.PI won't work either
 ```
 
-Making a property non-configurable is one-way road. We cannot change it back, because `defineProperty` doesn't work on non-configurable properties.
+Making a property non-configurable is a one-way road. We cannot change it back, because `defineProperty` doesn't work on non-configurable properties.
 
 Here we are making `user.name` a "forever sealed" constant:
 
@@ -266,7 +266,7 @@ So, we can set many properties at once.
 
 To get many descriptors at once, we can use the method [Object.getOwnPropertyDescriptors(obj)](mdn:js/Object/getOwnPropertyDescriptors).
 
-Together with `Object.defineProperties` it can be used as an "flags-aware" way of cloning an object:
+Together with `Object.defineProperties` it can be used as a "flags-aware" way of cloning an object:
 
 ```js
 let clone = Object.defineProperties({}, Object.getOwnPropertyDescriptors(obj));

1-js/07-object-oriented-programming/02-property-accessors/article.md

@@ -55,7 +55,7 @@ alert(user.fullName); // John Smith
 */!*
 ```
 
-From outside, an accessor property looks like a regular one. That's the idea of accessor properties. We don't call `user.fullName` as a function, we read it normally: the getter runs behind the scenes.
+From outside, an accessor property looks like a regular one. That's the idea of accessor properties. We don't *call* `user.fullName` as a function, we *read* it normally: the getter runs behind the scenes.
 
 As of now, `fullName` has only a getter. If we attempt to assign `user.fullName=`, there will be an error.
 
@@ -97,7 +97,7 @@ Sometimes it's normal that there's only a setter or only a getter. But the prope
 
 ## Accessor descriptors
 
-Descriptors for accessor properties are different.
+Descriptors for accessor properties are different -- as compared with data properties.
 
 For accessor properties, there is no `value` and `writable`, but instead there are `get` and `set` functions.
 
@@ -182,7 +182,7 @@ Technically, the external code may still access the name directly by using `user
 
 ## Using for compatibility
 
-One of great ideas behind getters and setters -- they allow to take control over a "normal" data property and tweak it at any moment.
+One of the great ideas behind getters and setters -- they allow to take control over a "normal" data property and tweak it at any moment.
 
 For instance, we started implementing user objects using data properties `name` and `age`:
 

1-js/07-object-oriented-programming/03-prototype-inheritance/article.md

@@ -159,7 +159,7 @@ rabbit.walk = function() {
 rabbit.walk(); // Rabbit! Bounce-bounce!
 ```
 
-Since now, `rabbit.walk()` call finds the method immediately in the object and executes it, without using the prototype:
+From now on, `rabbit.walk()` call finds the method immediately in the object and executes it, without using the prototype:
 
 ![](proto-animal-rabbit-walk-2.png)
 
@@ -192,7 +192,7 @@ alert(admin.fullName); // John Smith (*)
 admin.fullName = "Alice Cooper"; // (**)
 ```
 
-Here in the line `(*)` the property `admin.fullName` has a getter in the prototype `user`, so it is called. And in the line `(**)` the property is has a setter in the prototype, so it is called.
+Here in the line `(*)` the property `admin.fullName` has a getter in the prototype `user`, so it is called. And in the line `(**)` the property has a setter in the prototype, so it is called.
 
 ## The value of "this"
 

1-js/07-object-oriented-programming/04-function-prototype/article.md

@@ -14,7 +14,7 @@ As we know already, `new F()` creates a new object. But what we didn't use yet `
 
 That property is used by the JavaScript itself to set `[[Prototype]]` for new objects.
 
-**When a new object is created with `new F()`, the `[[Prototype]]` of it is set to `F.prototype`.**
+**When a new object is created with `new F()`, the object's `[[Prototype]]` is set to `F.prototype`.**
 
 Please note that `F.prototype` here means a regular property named `"prototype"` on `F`. It sounds something similar to the term "prototype", but here we really mean a regular property with this name.
 

1-js/07-object-oriented-programming/05-native-prototypes/article.md

@@ -169,7 +169,7 @@ function showArgs() {
 }
 ```
 
-That's more efficient, because evades creation of an extra array object `[]`. From the other side -- more letters to write it.
+That's more efficient, because it avoids the creation of an extra array object `[]`. On the other hand, it is longer to write.
 
 ## Summary
 

1-js/07-object-oriented-programming/06-prototype-methods/article.md

@@ -1,7 +1,7 @@
 
 # Methods for prototypes
 
-In this chapter we cover additional methods to work with the prototype.
+In this chapter we cover additional methods to work with a prototype.
 
 There are also other ways to get/set a prototype, besides those that we already know: