从数字字符串中删除所有前导零

Question

I have the below case:

1. 09189898989
2. 00898989899

I want to remove all leading zeros from the string using JavaScript

What is the best way to accomplish this?

Answer 1

您可以使用正则表达式来匹配字符串开头的零：

str = str.replace(/^0+/, '');

Answer 2

parseInt() will do the job.

var num = '00898989899';

parseInt( num, 10 );  // 898989899

Don't forget about the radix argument, especially since you're dealing with leading zeros here.

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If you can be sure that there won't be any zero digit after those leading zeros, you can even go more sneaky and use a combination of String.prototype.lastIndexOf() and String.prototype.slice() :

num.slice( num.lastIndexOf( '0' ) + 1 );

Answer 3

parseInt(number, 10)

您可以将其转换为字符串（如果需要）

parseInt(number, 10).toString()

Answer 4

为什么不只使用parseInt-

parseInt(00898989899);