M面经Prepare: Delete Words Starting With One Character - neverlandly - 博客园

M面经Prepare: Delete Words Starting With One Character - neverlandly - 博客园

 给定一个char array， 这个array是一个句子，然后给定一个字母，把这个array里面带有这个字母开头的单次删掉，操作是要求in place. 

检测   array[i]==' ' && i<array.length-1 && array[i+1]==target，这种情况，设置j从i+1开始直到找到下一个' '或者到达末尾，然后中间的全部删掉，i从j开始
特别要注意第一个char是target的情况

 6     public char[] modify(char[] array, char tar) {
 7         if (array==null || array.length==0) return new char[0];
 8         int index=0;
 9         int i=0;
10         for (; i<array.length; i++) {
11             if (i==0 && array[i]==tar || array[i]==' ' && i<array.length-1 && array[i+1]==tar) {
12                 int j = i+1; // no need t use temp j
13                 while (j<array.length && array[j]!=' ') j++;
14                 i = j;
15                 i--;
16             }
17             else array[index++] = array[i];
18         }
19         char[] res = Arrays.copyOf(array, index);
20         return res;
21     }

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