diff --git a/snippets/getType.md b/snippets/getType.md
index 381df31c3..da4b259c7 100644
--- a/snippets/getType.md
+++ b/snippets/getType.md
@@ -5,7 +5,8 @@ tags: type,beginner
 
 Returns the native type of a value.
 
-Returns lowercased constructor name of value, `"undefined"` or `"null"` if value is `undefined` or `null`.
+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.
 
 ```js
 const getType = v =>
@@ -14,4 +15,4 @@ const getType = v =>
 
 ```js
 getType(new Set([1, 2, 3])); // 'set'
-```
\ No newline at end of file
+```
diff --git a/snippets/isNil.md b/snippets/isNil.md
index c8ed1cbb2..8d7520991 100644
--- a/snippets/isNil.md
+++ b/snippets/isNil.md
@@ -5,7 +5,7 @@ tags: type,beginner
 
 Returns `true` if the specified value is `null` or `undefined`, `false` otherwise.
 
-Use the strict equality operator to check if the value and of `val` are equal to `null` or `undefined`.
+Use the strict equality operator to check if the value of `val` is equal to `null` or `undefined`.
 
 ```js
 const isNil = val => val === undefined || val === null;
@@ -14,4 +14,4 @@ const isNil = val => val === undefined || val === null;
 ```js
 isNil(null); // true
 isNil(undefined); // true
-```
\ No newline at end of file
+```
diff --git a/snippets/isNull.md b/snippets/isNull.md
index ba9495124..ec3065d06 100644
--- a/snippets/isNull.md
+++ b/snippets/isNull.md
@@ -5,7 +5,7 @@ tags: type,beginner
 
 Returns `true` if the specified value is `null`, `false` otherwise.
 
-Use the strict equality operator to check if the value and of `val` are equal to `null`.
+Use the strict equality operator to check if the value of `val` is equal to `null`.
 
 ```js
 const isNull = val => val === null;
@@ -13,4 +13,4 @@ const isNull = val => val === null;
 
 ```js
 isNull(null); // true
-```
\ No newline at end of file
+```
diff --git a/snippets/isUndefined.md b/snippets/isUndefined.md
index d6e09916b..112e66285 100644
--- a/snippets/isUndefined.md
+++ b/snippets/isUndefined.md
@@ -5,7 +5,7 @@ tags: type,beginner
 
 Returns `true` if the specified value is `undefined`, `false` otherwise.
 
-Use the strict equality operator to check if the value and of `val` are equal to `undefined`.
+Use the strict equality operator to check if `val` is equal to `undefined`.
 
 ```js
 const isUndefined = val => val === undefined;
@@ -13,4 +13,4 @@ const isUndefined = val => val === undefined;
 
 ```js
 isUndefined(undefined); // true
-```
\ No newline at end of file
+```