Node.js Path模塊源碼兩個常規表達

Question

我對node.js路徑模塊源中的2個正則表達式感到困惑

// Regex to split a windows path into three parts: [*, device, slash,
// tail] windows-only
var splitDeviceRe =
    /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;

// Regex to split the tail part of the above into [*, dir, basename, ext]
var splitTailRe =
    /^([\s\S]*?)((?:\.{1,2}|[^\\\/]+?|)(\.[^.\/\\]*|))(?:[\\\/]*)$/;

劑量splitTailRe如何工作？ 與該組最混淆的： "((?:\\.{1,2}|[^\\\\\\/]+?|)(\\.[^.\\/\\\\]*|))"

Answer 1

這可能對您有所幫助

splitDeviceRE = https://regex101.com/r/mV5gS0/2

splitTailRe = https://regex101.com/r/mV5gS0/1

它分解了您輸入的正則表達式，並逐步解釋了正則表達式的每個“部分”在做什么。