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海洋中岛屿数量问题 算法

const getIslands = (arr = []) => {
  const len = arr.length;
  const counter = 0;
  while(len) {
      let row = arr[arr.length - len];
      // let item;
      let num = 0;
      let cur = 0;
      for (let i = 0; i < row.length; i++) {
        let item = row[i];
        if(item === `+`) {
          num +=1;
          let netxItem = row[i + 1];
          // const nextRow = arr[arr.length - len + 1];
          // let nextRowitem = nextRow[i];
          if(item === netxItem) {
            break;
          }
      }
    }
  }
}

refs

https://leetcode.com/problems/number-of-islands

https://leetcode-cn.com/problems/number-of-islands/

DFS

https://zhuanlan.zhihu.com/p/133390668

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