let arr=[5,0,6,1,3,9,7,2,4,8];
let index=[3,4,6,5,9,4,3,7,2,9,5];
let tel='';
for (let i=0;i<index.length;i++) {
tel +=arr[index[i]];
}
console.log(tel);
请教大神下面代码的原理?
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转载自blog.csdn.net/qq_14866875/article/details/81233433
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