node.js - Nodejs 两条路径的区别

Question

我试图找出两条路径之间的区别。我有一个解决方案，但我对此并不满意，即使它有效。有没有更好/更简单的方法来做到这一点？

var firstPath =  '/my/first/path'
  , secondPath = '/my/first/path/but/longer'

// what I want to get is: '/but/longer'

// my code:
var firstPathDeconstruct = firstPath.split(path.sep)
  , secondPathDeconstruct = secondPath.split(path.sep)
  , diff = []

secondPathDeconstruct.forEach(function(chunk) {
  if (firstPathDeconstruct.indexOf(chunk) < 0) {
    diff.push(chunk)
  }
})

console.log(diff)
// output ['but', 'longer']

Answer 1

Node 提供了一个标准函数 path.relative，它正是这样做的，并且还处理您可能遇到的所有各种相对路径边缘情况:

来自 online docs :

path.relative(from, to)

Solve the relative path from from to to.

Examples:

path.relative('C:\\orandea\\test\\aaa', 'C:\\orandea\\impl\\bbb')
// returns
'..\\..\\impl\\bbb'

path.relative('/data/orandea/test/aaa', '/data/orandea/impl/bbb')
// returns
'../../impl/bbb'