Merge branch 'master' of https://github.com/iliakan/javascript-tutori…

…al-en

1-js/01-getting-started/1-intro/article.md

@@ -1,4 +1,4 @@
-# An introduction to JavaScript
+# An Introduction to JavaScript
 
 Let's see what's so special about JavaScript, what we can achieve with it and which other technologies play well with it.
 

1-js/02-first-steps/07-operators/article.md

@@ -201,7 +201,7 @@ Funny code, isn't it? We should understand how it works, because sometimes we ca
 
 ## Remainder %
 
-The remainder operator `%` despite it's look does not have a relation to percents.
+The remainder operator `%` despite its look does not have a relation to percents.
 
 The result of `a % b` is the remainder of the integer division of `a` by `b`.
 
@@ -415,7 +415,7 @@ let a = (1+2, 3+4);
 alert( a ); // 7 (the result of 3+4)
 ```
 
-Here, the first expression `1+2` is evaluated, and it's result is thrown away, then `3+4` is evaluated and returned as the result.
+Here, the first expression `1+2` is evaluated, and its result is thrown away, then `3+4` is evaluated and returned as the result.
 
 ```smart header="Comma has a very low precedence"
 Please note that the comma operator has very low precedence, lower than `=`, so parentheses are important in the example above.

1-js/02-first-steps/13-switch/article.md

@@ -155,14 +155,15 @@ switch (arg) {
   case '0':
   case '1':
     alert( 'One or zero' );
+    break;
 
   case '2':
     alert( 'Two' );
     break;
 
   case 3:
     alert( 'Never executes!' );
-
+    break;
   default:
     alert( 'An unknown value' )
 }

1-js/04-object-basics/04-object-methods/article.md

@@ -316,7 +316,7 @@ The result of a property access `user.hi` is not a function, but a value of Refe
 
 When parentheses `()` are called on the Reference Type, they receive the full information about the object and it's method, and can set the right `this` (`=user` in this case).
 
-Any other operation like assignment `hi = user.hi` discards the reference type as a whole, takes the value of `user.hi` (a function) and passes it on. So any further operation "looses" `this`.
+Any other operation like assignment `hi = user.hi` discards the reference type as a whole, takes the value of `user.hi` (a function) and passes it on. So any further operation "loses" `this`.
 
 So, as the result, the value of `this` is only passed the right way if the function is called directly using a dot `obj.method()` or square brackets `obj[method]()` syntax (they do the same here).
 

1-js/04-object-basics/05-object-toprimitive/article.md

@@ -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.
 

1-js/04-object-basics/06-constructor-new/article.md

@@ -162,16 +162,16 @@ alert( new SmallUser().name );  // John
 
 Usually constructors don't have a `return` statement. Here we mention the special behavior with returning objects mainly for the sake of completeness.
 
-````smart header="Omitting brackets"
-By the way, we can omit brackets after `new`, if it has no arguments:
+````smart header="Omitting parentheses"
+By the way, we can omit parentheses after `new`, if it has no arguments:
 
 ```js
-let user = new User; // <-- no brackets
+let user = new User; // <-- no parentheses
 // same as
 let user = new User();
 ```
 
-Omitting brackets here is not considered a "good style", but the syntax is permitted by specification.
+Omitting parentheses here is not considered a "good style", but the syntax is permitted by specification.
 ````
 
 ## Methods in constructor

1-js/05-data-types/04-array/article.md

@@ -4,7 +4,7 @@ Objects allow to store keyed collections of values. That's fine.
 
 But quite often we find that we need an *ordered collection*, where we have a 1st, a 2nd, a 3rd element and so on. For example, we need that to store a list of something: users, goods, HTML elements etc. 
 
-It not convenient to use an object here, because it provides no methods to manage the order of elements. We can’t insert a new property “between” the existing ones. Objects are just not meant for such use.
+It is not convenient to use an object here, because it provides no methods to manage the order of elements. We can’t insert a new property “between” the existing ones. Objects are just not meant for such use.
 
 There exists a special data structure named `Array`, to store ordered collections.