我有一个数字0.6720505101642719，我想将其设为0.6720，而.toFixed(4)返回0.6721并将数字切成字符串不能正常工作
const modifyDecimal = (number,decimalCount) => {
const parts = number.toString().split('.');
const limitedDecimal = parts[1].slice(0,decimalCount);
return Number(`${parts[0]}.${limitedDecimal}`);
}
modifyDecimal(0.6720505101642719,4)
// 0.672 missing the 0 here
使用此：
Math.makeShorter = function(number,decimals) {
if(decimals < 1) return Math.floor(number).toString();
var factor = Math.pow(10,decimals);
var num = Math.floor(number);
var fraction = (Math.floor((number - num) * factor) / factor).toString().split('.').pop().toString();
var digits = fraction.length;
if(digits < decimals) {
for(var i = 0; i < (decimals - digits); i++) {
fraction += '0';
}
}
return num.toString() + '.' + fraction.toString();
}
您可以对数字进行分割，然后再从数字后面取4。
const n = 0.6725505101642719;
const [a,b] = n.toString().split(".");
const res = +`${a}.${b.slice(0,4)}`;
console.log(res)
const modifyDecimal = (number,decimalCount) => {
const [a,b] = number.toString().split('.');
return +`${a}.${b.slice(0,decimalCount)}`;
}
console.log(modifyDecimal(0.6725505101642719,4)),
希望这会为您完成。
Dim rs As ADODB.Recordset
Set rs = New ADODB.Recordset
ConnectDB '<~ recursive call!
With wsBooks
let num = 0.6720505101642719;
(Math.trunc(num*10000)/10000).toFixed(4)