[英]Input field value - remove leading zeros
I have a textbox in Javascript. 我在Javascript中有一个文本框。 When I enter
'0000.00'
in the textbox, I want to know how to convert that to only having one leading zero, such as '0.00'
. 当我在文本框中输入
'0000.00'
时,我想知道如何将其转换为只有一个前导零,例如'0.00'
。
More simplified solution is as below. 更简化的解决方案如下。 Check this out!
看一下这个!
var resultString = document.getElementById("theTextBoxInQuestion")
.value
.replace(/^[0]+/g,"");
str.replace(/^0+(?!\.|$)/, '')
'0000.00' --> '0.00'
'0.00' --> '0.00'
'00123.0' --> '123.0'
'0' --> '0'
var value= document.getElementById("theTextBoxInQuestion").value;
var number= parseFloat(value).toFixed(2);
It sounds like you just want to remove leading zeros unless there's only one left ("0" for an integer or "0.xxx" for a float, where x can be anything). 听起来你只想删除前导零,除非只剩下一个(整数为“0”或浮点数为“0.xxx”,其中x可以是任何东西)。
This should be good for a first cut: 这对于第一次切割应该是好的:
while (s.charAt(0) == '0') { # Assume we remove all leading zeros
if (s.length == 1) { break }; # But not final one.
if (s.charAt(1) == '.') { break }; # Nor one followed by '.'
s = s.substr(1, s.length-1)
}
Ok a simple solution. 好的简单解决方案。 The only problem is when the string is "0000.00" result in plain 0. But beside that I think is a cool solution.
唯一的问题是,当字符串为“0000.00”时,结果为0。但除此之外,我认为这是一个很酷的解决方案。
var i = "0000.12";
var integer = i*1; //here's is the trick...
console.log(i); //0000.12
console.log(integer);//0.12
For some cases I think this can work... 在某些情况下,我认为这可行...
You can use this code: 您可以使用此代码:
<script language="JavaScript" type="text/javascript">
<!--
function trimNumber(s) {
while (s.substr(0,1) == '0' && s.length>1) { s = s.substr(1,9999); }
return s;
}
var s1 = '00123';
var s2 = '000assa';
var s3 = 'assa34300';
var s4 = 'ssa';
var s5 = '121212000';
alert(s1 + '=' + trimNumber(s1));
alert(s2 + '=' + trimNumber(s2));
alert(s3 + '=' + trimNumber(s3));
alert(s4 + '=' + trimNumber(s4));
alert(s5 + '=' + trimNumber(s5));
// end hiding contents -->
</script>
试试这个:
<input type="text" onblur="this.value=this.value.replace(/^0+(?=\d\.)/, '')">
You can use a regex to replace the leading zeroes with a single one: 您可以使用正则表达式将前导零替换为单个零:
valueString.replace(/^(-)?0+(0\.|\d)/, '$1$2')
>'-000.0050'.replace(/^(-)?0+(0\.|\d)/, '$1$2')
< "-0.0050"
>'-0010050'.replace(/^(-)?0+(0\.|\d)/, '$1$2')
< "-10050"
Matches: <beginning of text><optional minus sign><any sequence of zeroes><either a zero before the dot or another digit>
匹配项:
<beginning of text><optional minus sign><any sequence of zeroes><either a zero before the dot or another digit>
Replaces with: <same sign if available><the part of the string after the sequence of zeroes>
替换为:
<same sign if available><the part of the string after the sequence of zeroes>
^ is the beginning of text ^是文本的开头
? ? means optional (refers to the previous character)
表示可选(指前一个字符)
(a|b) means either a or b (a | b)表示a或b
. 。 is the dot (escaped as . has a special meaning)
是点(转义为。具有特殊含义)
\\d is any digit \\ d是任何数字
$1 means what you found in the first set of () $ 1表示你在第一组中发现的()
$2 means what you found in the second set of () $ 2表示你在第二组中找到的()
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