如何用JavaScript正则匹配多次/entry/[0-9]+并返回对应前缀字符串数组

Absolutely! You can get the exact array you're looking for using a single regular expression combined with JavaScript's String.match() method. Here's how to do it:

Working Code Example #

const inputString = '/a/b/entry/0/c/d/entry/0';
// Regex to match all cumulative paths ending with /entry/[digits]
const matchRegex = /.*?\/entry\/\d+/g;
const result = inputString.match(matchRegex);

// Adjust to add trailing slash to the first entry (matching your example)
if (result?.length) {
  result[0] += '/';
}

console.log(result); // Output: ["/a/b/entry/0/", "/a/b/entry/0/c/d/entry/0"]

How the Regex Works #

Let's break down the pattern .*?\/entry\/\d+:

• .*?: The non-greedy wildcard matches any characters (except newlines) but stops at the earliest possible point. This is crucial because it ensures we capture the shortest valid path up to each /entry/[digits] instance, rather than jumping straight to the last match.
• \/entry\/: Escaped slashes match the literal string /entry/ (slashes need escaping because they're used as regex delimiters).
• \d+: Matches one or more digits, which covers your [0-9]+ requirement for numeric entries.
• The g flag enables global matching, so the regex scans the entire string and finds all matching cumulative paths.

Why split() Isn't Ideal #

While split() is great for breaking strings into segments based on a separator, it doesn't naturally capture cumulative prefixes like we need here. Using match() with a global regex is far more direct and intuitive for this specific task.

内容的提问来源于stack exchange，提问作者user3142067