Added lib docs (#27)

* added docs

* fix

Author: dovgopoly

docs/getting-started/guides/libs/arrays/array-helper.md

@@ -146,6 +146,12 @@ function reverse(
 ) internal pure returns (address[] memory reversed_);
 ```
 
+```solidity
+function reverse(
+    bool[] memory arr_
+) internal pure returns (address[] memory reversed_);
+```
+
 ```solidity
 function reverse(
     string[] memory arr_
@@ -197,6 +203,14 @@ function insert(
 ) internal pure returns (uint256);
 ```
 
+```solidity
+function insert(
+    bool[] memory to_,
+    uint256 index_,
+    bool[] memory what_
+) internal pure returns (uint256);
+```
+
 ```solidity
 function insert(
     string[] memory to_,

docs/getting-started/guides/libs/arrays/set-helper.md

@@ -36,14 +36,73 @@ function add(
 
 ```solidity
 function add(
+    EnumerableSet.Bytes32Set storage set, 
+    bytes32[] memory array_
+) internal;
+```
+
+```solidity
+function add(
+    StringSet.Set storage set, 
+    string[] memory array_
+) internal;
+```
+
+#### Description
+
+This function adds the provided `array_` to the provided `set`. Parameter `set` is always a **storage** array, whereas `array_` is a **memory** array.
+
+#### Time complexity
+
+Linear.
+
+#### Example
+
+```solidity
+EnumerableSet.UintSet public nums;
+nums.add(1); 
+nums.add(2); 
+
+uint256[] memory arr_ = new uint256[](2);
+arr_[0] = 3; 
+arr_[1] = 4;
+
+nums.add(arr_); // [1, 2, 3, 4]
+```
+
+### strictAdd
+
+```solidity
+function strictAdd(
+    EnumerableSet.AddressSet storage set, 
+    address[] memory array_
+) internal;
+```
+
+```solidity
+function strictAdd(
+    EnumerableSet.UintSet storage set, 
+    uint256[] memory array_
+) internal;
+```
+
+```solidity
+function strictAdd(
+    EnumerableSet.Bytes32Set storage set, 
+    bytes32[] memory array_
+) internal;
+```
+
+```solidity
+function strictAdd(
     StringSet.Set storage set, 
     string[] memory array_
 ) internal;
 ```
 
 #### Description
 
-This function adds the provided `array_` to the provided `set`.
+This function strictly adds the provided `array_` to the provided `set`. Parameter `set` is always a **storage** array, whereas `array_` is a **memory** array. Reverts if elements duplicate.
 
 #### Time complexity
 
@@ -61,6 +120,7 @@ arr_[0] = 3;
 arr_[1] = 4;
 
 nums.add(arr_); // [1, 2, 3, 4]
+nums.add(arr_); // Reverts with: "SetHelper: element already exists"
 ```
 
 ### remove
@@ -79,6 +139,13 @@ function remove(
 ) internal;
 ```
 
+```solidity
+function remove(
+    EnumerableSet.Bytes32Set storage set, 
+    bytes32[] memory array_
+) internal;
+```
+
 ```solidity
 function remove(
     StringSet.Set storage set, 
@@ -111,3 +178,58 @@ arr_[3] = 10;
 
 nums.remove(arr_); // [2, 4]
 ```
+
+### strictRemove
+
+```solidity
+function strictRemove(
+    EnumerableSet.AddressSet storage set, 
+    address[] memory array_
+) internal;
+```
+
+```solidity
+function strictRemove(
+    EnumerableSet.UintSet storage set, 
+    uint256[] memory array_
+) internal;
+```
+
+```solidity
+function strictRemove(
+    EnumerableSet.Bytes32Set storage set, 
+    bytes32[] memory array_
+) internal;
+```
+
+```solidity
+function strictRemove(
+    StringSet.Set storage set, 
+    string[] memory array_
+) internal;
+```
+
+#### Description
+
+This function strictly removes the provided `array_` from the provided `set`. Parameter `set` is always a **storage** array, whereas `array_` is a **memory** array. Reverts if set doesn't contain provided elements.
+
+#### Time complexity
+
+Linear.
+
+#### Example
+
+```solidity
+EnumerableSet.UintSet public nums;
+nums.add(1); 
+nums.add(2); 
+nums.add(3); 
+nums.add(4);
+
+uint256[] memory arr_ = new uint256[](4);
+arr_[0] = 1; 
+arr_[1] = 3;
+
+nums.remove(arr_); // [2, 4]
+nums.remove(arr_); // Reverts with: "SetHelper: no such element"
+```