Let's say I have the following filelist:
foo-bar_lorem.ext
foo-bar_ipsum.ext
foo-bar_dolor.ext
foo-baz_lorem.ext
foo-baz_ipsum.ext
foo-baz_dolor.ext
foo-amet.ext
foo-sic.ext
What I'd like to do is to create new arrays based on what's between the dash and the underscore, while having an array of a single object when the file has no underscore in it:
The resulting arrays should be as follow:
array1 = ['foo-bar_lorem.ext', 'foo-bar_ipsum.ext', 'foo-bar_dolor.ext'];
array2 = ['foo-baz_lorem.ext', 'foo-baz_ipsum.ext', 'foo-baz_dolor.ext'];
array3 = ['foo-amet.ext'];
array4 = ['foo-sic.ext'];
This is how I'm currently retrieving the filelist using fs:
const path = require('path');
const fs = require('fs');
const myFolder = path.join(__dirname);
fs.readdir(myFolder, function (err, files) {
if (err) {
return console.log('Unable to scan directory: ' + err);
}
//listing all files using forEach
files.forEach(function (file) {
console.log(file);
});
});
this is the logic need to be made with file object returns from fs.readdir
const files = ['foo-bar_lorem.ext', 'foo-bar_ipsum.ext', 'foo-bar_dolor.ext',
'foo-baz_lorem.ext', 'foo-baz_ipsum.ext', 'foo-baz_dolor.ext', 'foo-amet.ext', 'foo-sic.ext']
const res = files.reduce((acc, file) => {
const dir = file.split("-")[1].split("_")[0]
acc[dir] = [...(acc[dir] ? acc[dir] : []), file]
return acc;
}, {});
console.log(Object.values(res))after embedding it inside the callback
function getFiles(myFolder) {
return new Promise((resolve, reject) => {
try {
fs.readdir(myFolder, function (err, files) {
if (err) {
return console.log('Unable to scan directory: ' + err);
}
const res = files.reduce((acc, file) => {
const dir = file.split("-")[1].split("_")[0]
acc[dir] = [...(acc[dir] ? acc[dir] : []), file]
return acc;
}, {});
resolve(Object.values(res))
});
} catch (err) {
reject(err)
}
})
}