Currently, I am working with an array of file paths and my goal is to read all the files inside a Promise.all function, followed by carrying out several tasks.
var files = ["./file1.txt", "./file2.txt"]
Promise.all(files.forEach(file=>{ /* read file content */}))
To utilize Array.map, follow this approach:
var files = ["./file1.txt", "./file2.txt"]
Promise.all(files.map(async file=>{ /* read file content */}))
If you prefer not to use an async function but still want it to return a promise, that works as well
var files = ["./file1.txt", "./file2.txt"]
Promise.all(files.map(file=>{ /* read file content, return a promise */}))
[edit] here's a demonstration using my favored file interface, fse - essentially fs with promises integrated:
var files = ["./file1.txt", "./file2.txt"]
Promise.all(files.map(file=>{
return fse.readFile(file, 'utf-8');
})).then(results => {
// results is an array of strings of the contents of each file
})
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