const array = Array(5).fill('');
["", "", "", "", ""]
const matrix = Array(5).fill(0).map(()=>Array(5).fill(0));
0: (5) [0, 0, 0, 0, 0]
1: (5) [0, 0, 0, 0, 0]
2: (5) [0, 0, 0, 0, 0]
3: (5) [0, 0, 0, 0, 0]
4: (5) [0, 0, 0, 0, 0]
const array = Array(5).fill('');
["", "", "", "", ""]
const matrix = Array(5).fill(0).map(()=>Array(5).fill(0));
0: (5) [0, 0, 0, 0, 0]
1: (5) [0, 0, 0, 0, 0]
2: (5) [0, 0, 0, 0, 0]
3: (5) [0, 0, 0, 0, 0]
4: (5) [0, 0, 0, 0, 0]
本文标题：声明和初始化数组
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