async-map

async-map

Transform each value in an array asynchronously

install

npm install async-map

usage

const map = require('async-map')
const load = require('img-load')

var paths = ['images/foo.png', 'images/bar.png']
var images = map(paths, load, (error, image, index) => {
  if (error) throw error

  // Immediately add image to DOM...
  document.body.appendChild(image)

  // or, only display when all images have been loaded
  if (images.length === paths.length) {
    for (var image of images) {
      document.body.appendChild(image)
    }
  }
})

result = map(values, iterator, callback)

Performs iterator on each value in values in sequence. result is populated as each value in the initial array is transformed.

• values: An array of values to be transformed
• iterator: A function of the form iterator(value, callback), e.g. fs.stat(path, callback)
• callback: A function of the form callback(error, value, index) which receives each transformed value as iterator completes

license

MIT © Brandon Semilla