83 lines
1.8 KiB
TypeScript
83 lines
1.8 KiB
TypeScript
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/**
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* 将一个整数转换为分数保留两位小数
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* @param num
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*/
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export function formatToFraction(num: number | string | undefined): string {
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if (num === undefined) return '0.00';
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const parsedNumber = typeof num === 'string' ? Number.parseFloat(num) : num;
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return (parsedNumber / 100).toFixed(2);
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}
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/**
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* 将一个数转换为 1.00 这样
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* 数据呈现的时候使用
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*
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* @param num 整数
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*/
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export function floatToFixed2(num: number | string | undefined): string {
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let str = '0.00';
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if (num === undefined) {
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return str;
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}
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const f = formatToFraction(num);
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const decimalPart = f.toString().split('.')[1];
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const len = decimalPart ? decimalPart.length : 0;
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switch (len) {
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case 0: {
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str = `${f.toString()}.00`;
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break;
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}
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case 1: {
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str = `${f.toString()}0`;
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break;
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}
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case 2: {
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str = f.toString();
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break;
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}
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}
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return str;
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}
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/**
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* 将一个分数转换为整数
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* @param num
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*/
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export function convertToInteger(num: number | string | undefined): number {
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if (num === undefined) return 0;
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const parsedNumber = typeof num === 'string' ? Number.parseFloat(num) : num;
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return Math.round(parsedNumber * 100);
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}
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/**
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* 元转分
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*/
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export function yuanToFen(amount: number | string): number {
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return convertToInteger(amount);
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}
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/**
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* 分转元
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*/
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export function fenToYuan(price: number | string): string {
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return formatToFraction(price);
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}
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/**
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* 计算环比
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*
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* @param value 当前数值
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* @param reference 对比数值
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*/
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export function calculateRelativeRate(
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value?: number,
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reference?: number,
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): number {
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// 防止除0
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if (!reference || reference === 0) return 0;
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return Number.parseFloat(
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((100 * ((value || 0) - reference)) / reference).toFixed(0),
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);
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}
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