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「评论」正则表达式 #91
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export const addSeparator = (str = '', sep = ',') => {
str += '';
const arr = str.split('.'),
reg = /(?=((?!\b)\d{3})+$)/g
let integer = arr[0],
decimal = arr.length > 1 ? arr[0] : '';
integer = integer.replace(reg, sep);
return integer + decimal;
} |
测试用例中 |
哇 |
大佬 |
const addSeparator = (str = '', sep = ',') => {
str += '';
const arr = str.split('.'),
reg = /(?=((?!\b)\d{3})+$)/g
let integer = arr[0],
decimal = arr.length <= 1 ? '' : `.${arr[1]}`;
integer = integer.replace(reg, sep);
return integer + decimal;
}
console.log(addSeparator(-10000.23)); // -10,000.23
console.log(addSeparator(100)); // 100
console.log(addSeparator(1234, ";")); // 1;234 上面那段代码逻辑写错了,小数位的值取错了。 |
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正则表达式:https://xin-tan.com/passages/2019-03-21-js-re/
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