offer整数JavaScript 的相关内容

文章 2021-11-16 来自：开发者社区

剑指Offer——把字符串转换成整数（JS实现）

题目描述解题思路本题需要考虑的一是数值是由范围的，其次就是正则表达式怎么写，当然本题也可以不使用正则表达式，但是本次题解采用的是正则，因为这样简单易懂。首先去除字符串两侧的空格。使用正则表达式匹配出带正负号或者不带的数字部分。判断匹配的是否存在，存在就继续判断是否在数值范围内，反之则返回0。解题代码var strToInt = function(str) { // 首先去除字符串两侧空格...

文章 2021-11-16 来自：开发者社区

剑指Offer——数值的整数次方（JS实现）

题目描述解题思路本题核心：当n为奇数和偶数时两种情况的讨论，同时要注意n为0、负数时的情况。情况1： (2,4) = (2,2) * (2,2)情况2：(2,5) = (2,2) * (2,2) * 2具体详尽思路请看注释解题代码var myPow = function(x, n) { // !本题核心：当n为奇数和偶数时两种情况的讨论 // 情况1： (2,4) = (2,...

文章 2021-11-15 来自：开发者社区

剑指Offer——1~n整数中1出现的次数（JS实现）

题目描述解题思路本题如果采用暴力的方法一定会超时本题关键在于找规律规律如下图所示（cur>1,cur=1.cur<1三种情况）解题代码（模拟队列）var countDigitOne = function(n) { let flag = 0; const TotalBase = Math.pow(10,(String(n).split('').length) - 1);...

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更新时间 2023-03-31 13:59:13

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