[英]How to add spaces between numbers with JavaScript?
With an input like 123456789
, how can I convert it into a format like 123 456 789
with JavaScript?对于像
123456789
这样的输入,如何使用 JavaScript 将其转换为像123 456 789
这样的格式?
split("").join(" ");
returns 1 2 3 4 5 6 7 8 9
.返回
1 2 3 4 5 6 7 8 9
。
If you always want the spaces to be by how far from the right you are, use a lookahead which counts in threes如果您总是希望空间距离您的右侧有多远,请使用以三为单位计数的前瞻
'12345678'.replace(/(\d)(?=(\d{3})+$)/g, '$1 '); // "12 345 678"
(?=pattern)
is the lookahead, \\d{3}
is 3 digits, and (pattern)+
means repeat the last pattern one or more times (greedily) until a the end of the String $
(?=pattern)
是前瞻, \\d{3}
是 3 位数字, (pattern)+
表示重复最后一个模式一次或多次(贪婪地)直到字符串$
的结尾
Use the substring method:使用子串方法:
var num = "123456789";
var result = "";
var gap_size = 3; //Desired distance between spaces
while (num.length > 0) // Loop through string
{
result = result + " " + num.substring(0,gap_size); // Insert space character
num = num.substring(gap_size); // Trim String
}
alert(result) // "123 456 789"
你可以:
var formatted = str.replace(/(\d{3})/g, '$1 ').trim();
使用带有split()
的正则表达式,例如
console.log('123456789'.split(/(\\d{3})/).join(' ').trim());
Try to design a pattern like this.尝试设计这样的模式。
function numberWithSpaces(value, pattern) { var i = 0, sequence = value.toString(); return pattern.replace(/#/g, _ => sequence[i++]); } console.log(numberWithSpaces('123456789', '### ### ###'));
You can use a regex for that您可以为此使用正则表达式
var a = "123456789"
a.match(/\d{3}/g).join(" ")
> "123 456 789"
The regex matches a group of 3 digits several times正则表达式多次匹配一组 3 位数字
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