Merge pull request #38 from javascript-tutorial/master

changes

Author: otmon76

1-js/02-first-steps/10-ifelse/article.md

@@ -68,7 +68,7 @@ if (podmínka) {
 
 ## Klauzule „else“
 
-Příkaz `if` může obsahovat nepovinný blok „else“, který se vykoná, když podmínka je nepravdivá.
+Příkaz `if` může obsahovat nepovinný blok `else`, který se vykoná, když podmínka je nepravdivá.
 
 Příklad:
 ```js run

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

@@ -255,7 +255,7 @@ alert( arr.includes(1) ); // true
 
 Please note that `indexOf` uses the strict equality `===` for comparison. So, if we look for `false`, it finds exactly `false` and not the zero.
 
-If we want to check if `item` exists in the array, and don't need the exact index, then `arr.includes` is preferred.
+If we want to check if `item` exists in the array, and don't need the index, then `arr.includes` is preferred.
 
 The method [arr.lastIndexOf](mdn:js/Array/lastIndexOf) is the same as `indexOf`, but looks for from right to left.
 
@@ -338,8 +338,6 @@ alert(users.findIndex(user => user.name == 'John')); // 0
 alert(users.findLastIndex(user => user.name == 'John')); // 3
 ```
 
-
-
 ### filter
 
 The `find` method looks for a single (first) element that makes the function return `true`.

5-network/10-long-polling/article.md

@@ -1,6 +1,6 @@
 # Long polling
 
-Long polling is the simplest way of having persistent connection with server, that doesn't use any specific protocol like WebSocket or Server Side Events.
+Long polling is the simplest way of having persistent connection with server, that doesn't use any specific protocol like WebSocket or Server Sent Events.
 
 Being very easy to implement, it's also good enough in a lot of cases.