Fix snippets typos

snippets/compactWhitespace.md

@@ -2,7 +2,7 @@
 
 Returns a string with whitespaces compacted.
 
-Use `String.prototype.replace()` with a regular expression to replace all occurences of 2 or more whitespace characters with a single space.
+Use `String.prototype.replace()` with a regular expression to replace all occurrences of 2 or more whitespace characters with a single space.
 
 ```js
 const compactWhitespace = str => str.replace(/\s{2,}/g, ' ');

snippets/detectDeviceType.md

@@ -1,6 +1,6 @@
 ### detectDeviceType
 
-Detects wether the website is being opened in a mobile device or a desktop/laptop.
+Detects weather the website is being opened in a mobile device or a desktop/laptop.
 
 Use a regular expression to test the `navigator.userAgent` property to figure out if the device is a mobile device or a desktop/laptop.
 

snippets/uniqueElementsBy.md

@@ -2,7 +2,7 @@
 
 Returns all unique values of an array, based on a provided comparator function.
 
-Use `Array.prototype.reduce()` and `Array.prototype.some()` for an array containing only the first unique occurence of each value, based on the comparator function, `fn`.
+Use `Array.prototype.reduce()` and `Array.prototype.some()` for an array containing only the first unique occurrence of each value, based on the comparator function, `fn`.
 The comparator function takes two arguments: the values of the two elements being compared.
 
 ```js

snippets/uniqueElementsByRight.md

@@ -2,7 +2,7 @@
 
 Returns all unique values of an array, based on a provided comparator function.
 
-Use `Array.prototype.reduce()` and `Array.prototype.some()` for an array containing only the last unique occurence of each value, based on the comparator function, `fn`.
+Use `Array.prototype.reduce()` and `Array.prototype.some()` for an array containing only the last unique occurrence of each value, based on the comparator function, `fn`.
 The comparator function takes two arguments: the values of the two elements being compared.
 
 ```js