162 lines
3.6 KiB
JavaScript
162 lines
3.6 KiB
JavaScript
// filters: {
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// numFilter (value) {
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// cutOutNum(value)
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// }
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// }
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//
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/**
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* 对源数据截取decimals位小数，不进行四舍五入
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* @param {*} num 源数据
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* @param {*} decimals 保留的小数位数
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*/
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export const cutOutNum = (num, decimals) => {
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if (isNaN(num) || (!num && num !== 0)) {
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return '--'
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}
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// 默认为保留的小数点后两位
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const dec = decimals || 2
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// 源数据为整数或者小数点后面小于decimals位的不处理
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const pointIndex = String(num).indexOf('.') + 1 // 获取小数点的位置 + 1
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const pointCount = pointIndex ? String(num).length - pointIndex : 0 // 获取小数点后的个数(需要保证有小数位)
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if (pointIndex === 0 || pointCount <= dec) {
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return num
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}
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let realVal = ''
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// 截取当前数据到小数点后decimals位
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realVal = `${String(num).split('.')[0]}.${String(num).split('.')[1].substring(0, dec)}`
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// 判断截取之后数据的数值是否为0
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if (realVal === 0) {
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realVal = 0
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}
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return realVal
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}
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/***
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* 计算字符串长度(英文占1个字符，中文汉字占2个字符)
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* @param str
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* @returns {number}
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*/
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export function strlen(str){
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var len = 0;
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for (var i=0; i<str.length; i++) {
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var c = str.charCodeAt(i);
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//单字节加1
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if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) {
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len++;
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}
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else {
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len+=2;
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}
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}
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return len;
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}
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/***
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* 截取字符串前10位
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* @param str
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* @returns {string}
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*/
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export function substring10(str){
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let len = 0;
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let res = '';
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for (let i=0; i<str.length; i++) {
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let c = str.charCodeAt(i);
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//单字节加1
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if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) {
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len++;
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}
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else {
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len+=2;
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}
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if(len <= 10){
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res += str[i];
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}
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}
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return res;
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}
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/***
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* 截取字符串前n位
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* @param str
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* @param n
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* @returns {string}
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*/
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export function substring(str,n){
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let len = 0;
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let res = '';
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for (let i=0; i<str.length; i++) {
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let c = str.charCodeAt(i);
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//单字节加1
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if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) {
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len++;
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}
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else {
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len+=2;
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}
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if(len <= n){
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res += str[i];
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}
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}
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return res;
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}
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/**
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* @param {number} agoTime
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* @returns {string}
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*/
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export function formatTime(agoTime) {
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const diff = agoTime / 1000
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if (diff < 60) {
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return '刚刚'
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} else if (diff < 3600) {
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// less 1 hour
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return parseInt(diff / 60) + '分钟前'
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} else if (diff < 3600 * 24) {
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return parseInt(diff / 3600) + '小时前'
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} else if (diff < 3600 * 24 * 30) {
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return parseInt(diff / (3600 * 24)) + '天前'
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} else if (diff <= 3600 * 24 * 30 * 24) {
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return parseInt(diff / (3600 * 24 * 30)) + '个月前'
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} else {
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return parseInt(diff / (3600 * 24 * 30 * 12)) + '年前'
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}
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}
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/**
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* formatSize
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* @param {*} size
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*/
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export function formatSize(size) {
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if (size === 0 || !size) return '0B';
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const units = ['B', 'K', 'M', 'G', 'T'];
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let index = 0;
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let result = size;
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while (result >= 1024 && index < units.length - 1) {
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result /= 1024;
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index++;
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}
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return result.toFixed(1) + units[index];
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}
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/**
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* formatNetSpeed
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* @param {*} size
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* @param space
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*/
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export function formatNetSpeed(size, space) {
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if (size === 0) {
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return space ? '0 B / s' : '0B/s'
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} else if (size < 1024) {
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return size + (space ? ' B / s' : 'B/s')
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} else if (size < 1024 * 1024) {
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return (size/1024).toFixed(2) + (space ? ' KB / s' : 'KB/s')
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} else if (size < 1024 * 1024 * 1024) {
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return (size/(1024 * 1024)).toFixed(2) + (space ? ' MB / s' : 'MB/s')
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} else {
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return (size/(1024 * 1024 * 1024)).toFixed(2) + (space ? ' GB / s' : 'GB/s')
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}
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}
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