Fix typos

CONTRIBUTING.md

@@ -64,7 +64,7 @@ Here's what you can do to help:
 - If your snippet's code is short enough (around 80 characters), you can make it a single-line function (although not mandatory). Otherwise, use multiple lines.
 - Prefer using `Array` methods whenever possible.
 - Prefer `Array.concat()` instead of `Array.push()` when working with `Array.reduce()`.
-- Use strict equality checking (`===` and `!==` instead of `==` and `!=`), unless you specificly have reason not to.
+- Use strict equality checking (`===` and `!==` instead of `==` and `!=`), unless you specifically have reason not to.
 - Prefer using the ternary operator (`condition ? trueResult : falseResult`) instead of `if else` statements whenever possible.
 - Avoid nesting ternary operators (but you can do it if you feel like you should).
 - You should define multiple variables on the same line (e.g. `const x = 0, y = 0`) on the same line whenever possible.

snippets/deep-flatten-array.md

@@ -2,7 +2,7 @@
 
 Use recursion.
 Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
-Rrecursively flatten each element that is an array.
+Recursively flatten each element that is an array.
 
 ```js
 const deepFlatten = arr => [].concat(...arr.map(v => Array.isArray(v) ? deepFlatten(v) : v));

snippets/shallow-clone-object.md

@@ -1,6 +1,6 @@
 ### Shallow clone object
 
-Use `Object.assign()` and an empty object (`{}`) to create a shallo clone of the original.
+Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
 
 ```js
 const shallowClone = obj => Object.assign({}, obj);

snippets/validate-email.md

@@ -1,6 +1,6 @@
 ### Validate email
 
-Use a regular experssion to check if the email is valid.
+Use a regular expression to check if the email is valid.
 Returns `true` if email is valid, `false` if not.
 
 ```js