722_Remove_Comments

Author: partho-maple

README.md

@@ -257,6 +257,7 @@ I have solved quite a number of problems from several topics. See the below tabl
 |43| **[65. Valid Number](https://tinyurl.com/yb6zsj3b)** | [Python](https://tinyurl.com/wu6rdaw/65_Valid_Number.py), [Swift](https://tinyurl.com/wuja3c4/65_Valid_Number.swift) | [Art 1](https://tinyurl.com/ycotov9v) | HARD | A fucking difficult but important problem. Chack DFA approach |
 |44| **[791. Custom Sort String](https://tinyurl.com/yag8mcfd)** | [Python](https://tinyurl.com/wu6rdaw/791_Custom_Sort_String.py), [Swift](https://tinyurl.com/wuja3c4/791_Custom_Sort_String.swift) | --- | Medium | Loved this problem |
 |45| **[157. Read N Characters Given Read4](https://tinyurl.com/y5g49nqt)** | [Python](https://tinyurl.com/wu6rdaw/157_Read_N_Characte_Given_Read4.py), [Swift](https://tinyurl.com/wuja3c4/157_Read_N_Characte_Given_Read4.swift) | --- | Easy (Not So!) | Loved this problem |
+|46| **[722. Remove Comments](https://tinyurl.com/y288v3lv)** | [Python](https://tinyurl.com/wu6rdaw/722_Remove_Comments.py), [Swift](https://tinyurl.com/wuja3c4/722_Remove_Comments.swift) | [Art 1](https://tinyurl.com/y56j4p76) | Medium |  |
 
 
 </p>

leetcode.com/swift/DS_ALGO_PRAC.playground/Sources/swift/722_Remove_Comments.swift

@@ -0,0 +1,41 @@
+// Source: https://tinyurl.com/y56j4p76
+import Foundation
+class Solution {
+    func removeComments(_ source: [String]) -> [String] {
+        
+        var result = [String]()
+        var lineBuffer = ""
+        var block_comment_open = false
+        
+        for line in source {
+            var curr_index = 0
+            var line_arr = Array(line).map { String($0) }
+            
+            while curr_index < line_arr.count {
+
+                let current_char = line_arr[curr_index]
+                
+                if current_char == "/" && curr_index + 1 < line_arr.count && line_arr[curr_index + 1] == "/" && block_comment_open == false {
+                    curr_index = line_arr.count + 1
+                } else if current_char == "/" && curr_index + 1 < line_arr.count && line_arr[curr_index + 1] == "*" && block_comment_open == false {
+                    block_comment_open = true
+                    curr_index += 2
+                } else if current_char == "*" && curr_index + 1 < line_arr.count && line_arr[curr_index + 1] == "/" && block_comment_open == true {
+                    block_comment_open = false
+                    curr_index += 2
+                } else if block_comment_open == false {
+                    lineBuffer += current_char
+                    curr_index += 1
+                } else {
+                    curr_index += 1
+                }
+            }
+            
+            if lineBuffer != "" && lineBuffer.isEmpty == false && block_comment_open == false {
+                result.append(lineBuffer)
+                lineBuffer = ""
+            }
+        }
+        return result
+    }
+}