// 冒泡排序
export function bubbleSort(arr) {
let i = arr.length - 1;
while (i > 0) {
let maxIndex = 0;
for (let j = 0; j < i; j++) {
if (arr[j] > arr[j + 1]) {
let temp = arr[j + 1];
arr[j + 1] = arr[j];
arr[j] = temp;
maxIndex = j;
}
}
i = maxIndex;
}
return arr;
}
// 通过属性值冒泡排序
export function bubbleSortByProp(arr, prop) {
let i = arr.length - 1;
while (i > 0) {
let maxIndex = 0;
for (let j = 0; j < i; j++) {
if (arr[j][prop] > arr[j + 1][prop]) {
let temp = arr[j + 1];
arr[j + 1] = arr[j];
arr[j] = temp;
maxIndex = j;
}
}
i = maxIndex;
}
return arr;
}
// 获取指定月份天数
export function getDateByMon(year, month){
let d = new Date(year, month, 0);
return d.getDate();
}
// 判断时间是不是今天
export function isTodayDate(time) {
if (time.toDateString() === new Date().toDateString()) {
return true;
} else {
return false;
}
}
// 对象判空
export function isObjEmpty(obj) {
if (obj && obj.constructor === Object) {
return Object.keys(obj).length;
}
if (obj && obj.constructor === Array) {
return obj.length;
}
}
// 首字母大写
export const capitalizeFirstLetter = (string) => {
return string.charAt(0).toUpperCase() + string.slice(1);
};
// 过滤值为空字符串或者为null的参数
export function getQuery(query) {
let res = {};
for (let [key, val] of Object.entries(query)) {
if (typeof val === 'string') {
if (!val.trim() || val === 'null') continue;
} else {
if (val === null || val === undefined) continue;
}
res[key] = val;
};
return res;
}
// 判断文件类型
export function isImage(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.png') || name.endsWith('.jpeg') || name.endsWith('.jpg') || name.endsWith('.png') || name.endsWith('.bmp');
}
export function isH5Video(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.mp4') || name.endsWith('.webm') || name.endsWith('.ogg');
}
export function isPdf(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.pdf');
}
export function isWord(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.doc') || name.endsWith('.docx');
}
export function isExcel(fileName) {
if (typeof fileName !== 'string') return;
let name = fileName.toLowerCase();
return name.endsWith('.xlsx') || name.endsWith('.xls');
}
// 数字2位转换
export function toDouble(num) {
if (num < 10) {
return '0' + num;
} else {
return num;
}
}
// 动态加载js
export function loadApi(src) {
return new Promise((resolve, reject) => {
const script = document.createElement('script');
script.type = '';
script.src = src;
script.async = 'async';
document.head.appendChild(script);
script.onload = () => { resolve(); };
script.onerror = () => { reject(); };
});
}
// 动态加载css
export function loadCss(src) {
return new Promise((resolve, reject) => {
const link = document.createElement('link');
link.rel = 'stylesheet';
link.href = src;
document.head.appendChild(link);
});
}
