引言
良久不写文章了,最近在学小程序感觉没得写,明天就来说说面试必备的排序算法吧,话不多唠,间接上代码,以下会画图解说每种排序的规定
冒泡排序
代码见图一,注解见图二(以下同上)
function bubbleSort(ary) {for (let i = 0; i < ary.length-1; i++) {for (let j = 0; j < ary.length - 1 - i; j++) {if (ary[j] > ary[j + 1]) {let temp = ary [j + 1];
ary [j + 1] = ary[j];
ary[j] = temp;
}
}
}
return ary
}
let ary = [12, 8, 24, 16, 1];
let newAry = bubbleSort(ary);
console.log(newAry);
插入排序
function insertSort(ary) {let handle = [];
handle.push(ary[0]);
for (let i = 1; i < ary.length; i++) {for (let j = handle.length - 1; j >= 0; j--) {if (ary[i] > handle[j]) {handle.splice(j + 1, 0, ary[i]);
break
}
if (j === 0) {handle.unshift(ary[i])
}
}
}
return handle
}
let ary = [12, 8, 24, 16, 1];
let newAry = insertSort(ary);
console.log(newAry);
疾速排序
function quickSort(ary) {if (ary.length <= 1) return ary;
let middle = ary.splice(Math.floor(ary.length / 2), 1)[0];
let leftAry = [], rightAry = [];
ary.forEach(v => v < middle ? leftAry.push(v) : rightAry.push(v));
return quickSort(leftAry).concat(middle, quickSort(rightAry))
}
let ary = [12, 8, 15, 10, 24, 16, 1];
let newAry = quickSort(ary);
console.log(newAry);
明天不想谈话(其实并不知道说啥),就这样,哈哈哈哈哈