[英]What should be the regular expression which matches exactly one $ (dollar) followed by any number of digits?
$ : match results $
$637 : match results $637
$$ : match results $
$272$ : match results $272
$262$$ : match results $272
$$445: match results $
3727 : match results null
2727$: match results null
$是一個特殊字符，表示字符串的結尾。
轉義美元符號應該可以解決您的問題：
^\$\d*
Javascript - 帶有字符串模板后跟 4 位數字的正則表達式？
[英]Javascript - Regular Expression with string template followed by 4 digits number?
正則表達式可檢測由連字符分隔的任意數量的數字
[英]regular expression detect any number of digits separated by only an hyphen
正則表達式中需要插入符號（^）和美元符號（$）是什么意思？
[英]What is the need for caret (^) and dollar symbol ($) in regular expression?
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