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metamask-extension/app/scripts/lib/nodeify.js
2017-10-06 13:02:34 -07:00

19 lines
491 B
JavaScript

const promiseToCallback = require('promise-to-callback')
const noop = function(){}
module.exports = function nodeify (fn, context) {
return function(){
const args = [].slice.call(arguments)
const lastArg = args[args.length - 1]
const lastArgIsCallback = typeof lastArg === 'function'
let callback
if (lastArgIsCallback) {
callback = lastArg
args.pop()
} else {
callback = noop
}
promiseToCallback(fn.apply(context, args))(callback)
}
}