扩展RegExp以获取文件扩展名 [英] Extend RegExp to get the file extension

问题描述

我知道，已经有很多基于RegExp的解决方案，但是我找不到适合我需求的解决方案.

I know, there're already a lot of RegExp based solutions, however I couldn't find one that fits to my needs.

我具有以下功能来获取URL的各个部分，但我还需要文件扩展名.

I've the following function to get the parts of an URL, but I also need the file extension.

var getPathParts = function(url) {
    var m = url.match(/(.*)[\/\\]([^\/\\]+)\.\w+$/);
    return {
        path: m[1],
        file: m[2]
    };
};

var url = 'path/to/myfile.ext';
getPathParts(url); // Object {path: "path/to", file: "myfile"} 

我对regex不太熟悉，也许您可​​以扩展此给定的regexp，以获取文件扩展名吗?

I'm not very familiar with regex, maybe you can extend this given regexp, to get the file-extension too?

最好的方法是，如果文件扩展名包含第3(第4)个值.例如:

Best way would, if the 3rd (4th) value the file extension contains. E.g.:

return {
    path: m[1],
    file: m[2],
    ext: m[3]
};

推荐答案

只需添加一个捕获组即可获取最后一个\w+:

Just add a capturing group to get the last \w+ :

var getPathParts = function(url) {
    var m = url.match(/(.*)[\/\\]([^\/\\]+)\.(\w+)$/);
    return {
        path: m[1],
        file: m[2],
        ext: m[3]
    };
};

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