Add some examples

From the old test suite

snippets/equals.md

@@ -23,4 +23,5 @@ const equals = (a, b) => {
 
 ```js
 equals({ a: [2, { e: 3 }], b: [4], c: 'foo' }, { a: [2, { e: 3 }], b: [4], c: 'foo' }); // true
+equals([ 1, 2, 3 ], { 0: 1, 1: 2, 2: 3 }); // true
 ```

snippets/getType.md

@@ -5,14 +5,14 @@ tags: type,beginner
 
 Returns the native type of a value.
 
-Return `"undefined"` or `"null"` if the value is `undefined` or `null`.
-Otherwise, use `Object.prototype.constructor.name` to get the name of the constructor, `String.prototype.toLowerCase()` to return it in lowercase.
+Return `'undefined'` or `'null'` if the value is `undefined` or `null`.
+Otherwise, use `Object.prototype.constructor.name` to get the name of the constructor.
 
 ```js
 const getType = v =>
-  v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase();
+  v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name;
 ```
 
 ```js
-getType(new Set([1, 2, 3])); // 'set'
+getType(new Set([1, 2, 3])); // 'Set'
 ```

snippets/isArrayLike.md

@@ -12,7 +12,8 @@ const isArrayLike = obj => obj != null && typeof obj[Symbol.iterator] === 'funct
 ```
 
 ```js
+isArrayLike([1, 2, 3]); // true
 isArrayLike(document.querySelectorAll('.className')); // true
 isArrayLike('abc'); // true
 isArrayLike(null); // false
-```
+```

snippets/isNil.md

@@ -14,4 +14,5 @@ const isNil = val => val === undefined || val === null;
 ```js
 isNil(null); // true
 isNil(undefined); // true
+isNil(''); // false
 ```

snippets/isPrimitive.md

@@ -13,9 +13,11 @@ const isPrimitive = val => Object(val) !== val;
 
 ```js
 isPrimitive(null); // true
+isPrimitive(undefined); // true
 isPrimitive(50); // true
 isPrimitive('Hello!'); // true
 isPrimitive(false); // true
 isPrimitive(Symbol()); // true
 isPrimitive([]); // false
-```
+isPrimitive({}); // false
+```