Starting with a string that has the full path of a file I threw together this function to walk up the directories of the file's path backwards. It works, but my gut tells me I'm overcooking the plumbing and I decided that this was a good opportunity for a learning experience. How would I refactor this to be more succinct?
const path = require('path')
function walk(file) {
let dir = path.dirname(file)
let arr = dir.split('/').filter(e => e).reverse()
let paths = []
for(let i = arr.length; i >= 0; i--) {
let sub = arr.slice(i)
paths.push(sub.reverse().join('/'))
}
paths = paths.filter(e => e).reverse()
paths.forEach(path => {
console.log('/' + path)
})
}
walk('/D0/D1/D2/D3/foo.bar')
Another simpler recursive version:
const path = require('path');
function walk(start) {
const dir = path.dirname(start)
console.log(dir);
if (dir !== '/') {
walk(dir);
}
}
walk('/D0/D1/D2/D3/foo.bar');
It will output:
"/D0/D1/D2/D3"
"/D0/D1/D2"
"/D0/D1"
"/D0"
"/"
You could use a recursive function.
I let you here an example
const path = require('path')
function walk(file) {
let dir = path.dirname(file)
walkRecursively(dir.split('/'))
}
function walkRecursively(dirs) {
if(dirs.length < 2) {
return;
}
console.log(path.join(dirs))
const nextDirs = dirs.slice(0, -1)
walkRecursively(nextDirs)
}
walk('/D0/D1/D2/D3/foo.bar')
you can do something like this
function walk(file) {
const path = file.split('/').filter(e => e).slice(0, -1)
const result = path.reduce((res, p, i) => {
return [
...res,
`${res[i - 1] || ''}/${p}`
]
}, []).reverse()
console.log(result)
}
walk('/D0/D1/D2/D3/foo.bar')