Update 交替合并字符串.py

交替合并字符串.py

@@ -27,3 +27,67 @@ word2：    p   q
 合并后：  a p b q c   d
  
 """
+
+class Solution(object):
+    def mergeAlternately_0(self, word1, word2):
+        """
+        菜鸟写法：写的好像比较复杂，但是胜在实现了。
+        :type word1: str
+        :type word2: str
+        :rtype: str
+        """
+        target = []
+        if len(word1) >= len(word2):
+            _word1 = word1[:len(word2)]
+            _word2 = word2
+            _word3 = word1[len(word2):]
+        else:
+            _word1 = word1
+            _word2 = word2[:len(word1)]
+            _word3 = word2[len(word1):]
+
+        for i in list(zip(_word1, _word2)):
+            target.append(i[0])
+            target.append(i[1])
+        target.extend(_word3)
+        return "".join(target)
+
+    def mergeAlternately_1(self, word1, word2):
+        """
+        :type word1: str
+        :type word2: str
+        :rtype: str
+        """
+        target = ""
+        if len(word1) >= len(word2):
+            _word1 = word1[:len(word2)]
+            _word2 = word2
+            _word3 = word1[len(word2):]
+        else:
+            _word1 = word1
+            _word2 = word2[:len(word1)]
+            _word3 = word2[len(word1):]
+
+        for i in range(len(_word1)):
+            target = target + _word1[i] + _word2[i]
+        return target + _word3
+
+    def mergeAlternately_2(self, word1, word2):
+        """
+        :type word1: str
+        :type word2: str
+        :rtype: str
+        """
+        word_merge = ""
+        for i in range(0, min(len(word1), len(word2))):
+            word_merge = word_merge + word1[i] + word2[i]
+
+        if len(word1) > len(word2):
+            word_merge = word_merge + word1[i + 1:]
+        else:
+            word_merge = word_merge + word2[i + 1:]
+        return word_merge
+
+    def mergeAlternately_3(self, word1: str, word2: str) -> str:
+        lw = min(len(word1), len(word2))
+        return ''.join(word1[i] + word2[i] for i in range(lw)) + word1[lw:] + word2[lw:]