70 lines
1.6 KiB
JavaScript
70 lines
1.6 KiB
JavaScript
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let util = {};
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util.getReturnData = (code, message = '', data = []) => {
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//保证数据格式
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if (!data) {
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data = [];
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}
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return { code: code, message: message, data: data };
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}
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//转换为格式化时间
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util.getLocalDate = (t) => {
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let date = new Date(parseInt(t));
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return date.getFullYear() + "-" + (parseInt(date.getMonth()) + 1) + "-" +
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date.getDate() + " " + date.getHours() + ":" + date.getMinutes() + ":" +
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date.getSeconds();
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}
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/**
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* 寻找>=target的最小下标
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* @param {number[]} nums
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* @param {number} target
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* @return {number}
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*/
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util.lower_bound = (nums, target) => {
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let first = 0;
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let len = nums.length;
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while (len > 0) {
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let half = len >> 1;
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let middle = first + half;
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if (nums[middle] < target) {
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first = middle + 1;
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len = len - half - 1;
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} else {
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len = half;
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}
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}
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return first;
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}
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/**
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* 寻找>target的最小下标
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* @param {number[]} nums
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* @param {number} target
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* @return {number}
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*/
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util.upper_bound = (nums, target) => {
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let first = 0;
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let len = nums.length;
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while (len > 0) {
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let half = len >> 1;
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let middle = first + half;
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if (nums[middle] > target) {
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len = half;
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} else {
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first = middle + 1;
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len = len - half - 1;
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}
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}
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return first;
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}
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util.interpolate = (ratio, first, second) => {
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let one_minus_ratio = 1.0 - ratio;
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let data = first * one_minus_ratio + second * ratio;
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return data;
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}
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module.exports = util;
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