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math.d.ts
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math.d.ts
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/**
* 数值安全乘法
* @param arg1 数值1
* @param arg2 数值2
*/
const mul = (arg1, arg2) => {
let m = 0;
const s1 = arg1.toString();
const s2 = arg2.toString();
if (s1.split('.')[1] !== undefined)
m += s1.split('.')[1].length;
if (s2.split('.')[1] !== undefined)
m += s2.split('.')[1].length;
return (Number(s1.replace('.', '')) * Number(s2.replace('.', ''))) / Math.pow(10, m);
};
/**
* 数值安全加法
* @param arg1 数值1
* @param arg2 数值2
*/
const add = (arg1, arg2) => {
let r1 = 0;
let r2 = 0;
let m = 0;
try {
r1 = arg1.toString().split('.')[1].length;
}
catch (e) {
r1 = 0;
}
try {
r2 = arg2.toString().split('.')[1].length;
}
catch (e) {
r2 = 0;
}
m = 10 ** Math.max(r1, r2);
return (mul(arg1, m) + mul(arg2, m)) / m;
};
/**
* 数值安全减法
* @param arg1 数值1
* @param arg2 数值2
*/
const sub = (arg1, arg2) => add(arg1, -arg2);
/**
* 数值安全除法
* @param arg1 数值1
* @param arg2 数值2
*/
const div = (arg1, arg2) => {
let t1 = 0;
let t2 = 0;
let r1 = 0;
let r2 = 0;
if (arg1.toString().split('.')[1] !== undefined)
t1 = arg1.toString().split('.')[1].length;
if (arg2.toString().split('.')[1] !== undefined)
t2 = arg2.toString().split('.')[1].length;
r1 = Number(arg1.toString().replace('.', ''));
r2 = Number(arg2.toString().replace('.', ''));
return (r1 / r2) * Math.pow(10, t2 - t1);
};
export { add, div, mul, sub };