[Swift]LeetCode925. 长按键入 | Long Pressed Name

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Your friend is typing his name into a keyboard.  Sometimes, when typing a character c, the key might get long pressed, and the character will be typed 1 or more times.

You examine the typed characters of the keyboard.  Return True if it is possible that it was your friends name, with some characters (possibly none) being long pressed.

 Example 1:

Input: name = "alex", typed = "aaleex"
Output: true
Explanation: 'a' and 'e' in 'alex' were long pressed.

Example 2:

Input: name = "saeed", typed = "ssaaedd"
Output: false
Explanation: 'e' must have been pressed twice, but it wasn't in the typed output.

Example 3:

Input: name = "leelee", typed = "lleeelee"
Output: true

Example 4:

Input: name = "laiden", typed = "laiden"
Output: true
Explanation: It's not necessary to long press any character.

 Note:

1. name.length <= 1000
2. typed.length <= 1000
3. The characters of name and typed are lowercase letters.

---

你的朋友正在使用键盘输入他的名字 name。偶尔，在键入字符 c 时，按键可能会被长按，而字符可能被输入 1 次或多次。

你将会检查键盘输入的字符 typed。如果它对应的可能是你的朋友的名字（其中一些字符可能被长按），那么就返回 True。

示例 1：

输入：name = "alex", typed = "aaleex"
输出：true
解释：'alex' 中的 'a' 和 'e' 被长按。

示例 2：

输入：name = "saeed", typed = "ssaaedd"
输出：false
解释：'e' 一定需要被键入两次，但在 typed 的输出中不是这样。

示例 3：

输入：name = "leelee", typed = "lleeelee"
输出：true

示例 4：

输入：name = "laiden", typed = "laiden"
输出：true
解释：长按名字中的字符并不是必要的。

 提示：

1. name.length <= 1000
2. typed.length <= 1000
3. name 和 typed 的字符都是小写字母。

---

8ms

class Solution {
    func isLongPressedName(_ name: String, _ typed: String) -> Bool {
        guard name.count != 0 else {
            return true
        }
        let chars1 = Array(name)
        let chars2 = Array(typed)
        var index = 0
        for i in 0..<chars2.count {
            if index == chars1.count {  // Best Idea
                if chars2[i] != chars2[i - 1] {
                    return false
                }
                continue
            }
            
            if chars1[index] == chars2[i] {
                index += 1
            } else if i != 0 && chars2[i] == chars2[i - 1] {
                continue
            } else {
                return false
            }
        }
        return index == chars1.count
    }
}

---

12ms

class Solution {
  func count(_ str: String) -> [(Character, Int)] {
    var result = [(Character,Int)]()
    
    var pos = str.startIndex
    while pos < str.endIndex {
      var next = str.index(after:pos)
      var c = 1
      while next < str.endIndex && str[pos] == str[next] {
        next = str.index(after:next)
        c += 1
      }
      result.append((str[pos], c))
      pos = next
    }
    
    
    return result
  }
  
  
  func isLongPressedName(_ name: String, _ typed: String) -> Bool {
    let nameC = count(name)
    let typedC = count(typed)
    
    if nameC.count != typedC.count {
      return false
    }
    
    for var i in 0..<nameC.count {
      if nameC[i].0 != typedC[i].0 {
        return false
      }
      if nameC[i].1 > typedC[i].1 {
        return false
      }
    }
    
    return true
  }
}

---

16ms

class Solution {
    func isLongPressedName(_ name: String, _ typed: String) -> Bool {
        guard name.count != 0 else {
            return true
        }
        let chars1 = Array(name)
        let chars2 = Array(typed)
        var index = 0
        for i in 0..<chars2.count {
            if index == chars1.count { // Best Idea
                if chars2[i] != chars2[i - 1] {
                    return false
                }
                continue
            }

            if chars1[index] == chars2[i] {
                    index += 1
            } else if i != 0 && chars2[i] == chars2[i - 1] {
                continue
            } else {
                return false
            }
        }
        return index == chars1.count
    }
}

---

36ms

class Solution {
    func isLongPressedName(_ name: String, _ typed: String) -> Bool {
        guard name.count != 0 else {
            return true
        }
        var index1 = 0
        var index2 = 0
        var char1 = Array(name)
        var char2 = Array(typed)
        while index1 < name.count && index2 < typed.count {
            if char1[index1] == char2[index2] {
                index1 += 1
                index2 += 1
            } else if index2 != 0 && char2[index2] == char2[index2 - 1] {
                    index2 += 1
            } else {
                return false
            }
        }
        return index1 == char1.count
    }
}

---

36ms

class Solution {
    func isLongPressedName(_ name: String, _ typed: String) -> Bool {
        var p:Int = 0
        for num in 0..<typed.count
        {
            var typeIndex = typed.index(typed.startIndex,offsetBy: num)
            var nameIndex = name.index(name.startIndex,offsetBy: p)
            if p < name.count && typed[typeIndex] == name[nameIndex]
            {
                p += 1
            }
            else
            {
                if num > 0 && typed[typeIndex] == typed[typed.index(typed.startIndex,offsetBy:num - 1)]
                {
                    continue
                }
                else
                {
                    return false
                }
            }
        }
        return p == name.count
    }
}

---

44ms

class Solution {
    func isLongPressedName(_ name: String, _ typed: String) -> Bool {
        guard name.count != 0 else {
            return true
        }
        
        var index1 = 0
        var index2 = 0
        var char1 = Array(name)
        var char2 = Array(typed)
        while index1 < name.count && index2 < typed.count {
            if char1[index1] == char2[index2] {
                index1 += 1
                index2 += 1
            } else {
                if index2 != 0 && char2[index2] == char2[index2 - 1] {
                    index2 += 1
                } else {
                    return false
                }
            }
        }
        guard index1 == name.count else {
            return false
        }
        
        while index2 < typed.count {
            if index2 != 0 && char2[index2] == char2[index2 - 1] {
                index2 += 1
                continue
            } else {
                break
            }
        }
        return index2 == typed.count
    }
}

---

52ms

class Solution {
    func isLongPressedName(_ name: String, _ typed: String) -> Bool {
        guard name.count != 0 else {
            return true
        }
        
        var index1 = 0
        var index2 = 0
        var char1 = Array(name)
        var char2 = Array(typed)
        while index1 < name.count && index2 < typed.count {
            if char1[index1] == char2[index2] {
                index1 += 1
                index2 += 1
            } else if index2 != 0 && char2[index2] == char2[index2 - 1] {
                index2 += 1
            } else {
                return false
            }
        }
        guard index1 == name.count else {
            return false
        }
        
        while index2 < typed.count {
            if index2 != 0 && char2[index2] == char2[index2 - 1] {
                index2 += 1
                continue
            } else {
                break
            }
        }
        return index2 == typed.count
    }
}