javascript .toFixed 不适用于 .0*
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.toFixed not for .0*
提问by user2565589
I have a few values:
我有几个价值观：
var one = 1.0000
var two = 1.1000
var three = 1.1200
var four = 1.1230
and function:
和功能：
function tofixed(val)
{
return val.toFixed(2);
}
this return:
这个回报：
1.00
1.10
1.12
1.12
I want maximum size after dot - 2, but only if numbers after for != 0. So i would like receive:
我想要点之后的最大尺寸 - 2，但前提是数字之后为 != 0。所以我想收到：
1
1.1
1.12
1.12
How can i make it?
我怎样才能做到？
回答by Blazemonger
.toFixed(x)returns a string. Just parse it as a float again:
.toFixed(x)返回一个字符串。只需再次将其解析为浮点数：
return parseFloat(val.toFixed(2));
回答by Paul S.
Assuming you want Stringoutputs
假设你想要字符串输出
function myFixed(x, d) {
if (!d) return x.toFixed(d); // don't go wrong if no decimal
return x.toFixed(d).replace(/\.?0+$/, '');
}
myFixed(1.0000, 2); // "1"
myFixed(1.1000, 2); // "1.1"
myFixed(1.1200, 2); // "1.12"
myFixed(1.1230, 2); // "1.12"
回答by Niet the Dark Absol
The "correct" way to do it is as follows:
“正确”的方法如下：
return Math.round(num*100)/100;
If you want to truncate it to two decimal places (ie. 1.238 goes to 1.23 instead of 1.24), use floorinstead of round.
如果要将其截断为两位小数（即 1.238 变为 1.23 而不是 1.24），请使用floor代替round。
