JavaScript - 保持尾随零
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JavaScript - Keep trailing zeroes
提问by Isadora
I want to parse a string and I used parseFloat(), but it removes all the trailing zeroes. How to prevent this - I need to parse the string exactly - if I have 2.5000, I need exactly the same result as a floating-point number - 2.5000.
我想解析一个字符串并使用了parseFloat()，但它删除了所有尾随零。如何防止这种情况 - 我需要准确地解析字符串 - 如果我有 2.5000，我需要与浮点数完全相同的结果 - 2.5000。
回答by Chad Scira
You can do
你可以做
parseFloat(2.5).toFixed(4);
If you need exactly the same floating point you may have to figure out the amount
如果您需要完全相同的浮点数，则可能需要计算出数量
var string = '2.54355';
parseFloat(string).toFixed(string.split('.')[1].length);
But i don't really understand why you even need to use parseFloat then? Numbers in javascript do not retain the floating-point count. so you would have to keep them as strings, and calculate against them as floats.
但我真的不明白为什么你甚至需要使用 parseFloat 呢？javascript 中的数字不保留浮点数。所以你必须将它们保留为字符串，并作为浮点数对它们进行计算。
