Ledger Nano X - The secure hardware wallet
SHARE
TWEET

Untitled

a guest Apr 6th, 2020 163 Never
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
  1. /*doFirst(function(result) {
  2.     doNext(result, function(newResult) {
  3.       doLast(newResult, function(finalResult) {
  4.         console.log('Got the final result: ' + finalResult);
  5.       }, failureCallback);
  6.     }, failureCallback);
  7.   }, failureCallback);*/
  8.  
  9.   let Q = require('q');
  10.  
  11.   Q.when(null)
  12.   .then(function doFirst(){
  13.       return 'First passes to next';
  14.   })
  15.   .then(function doNext(val){
  16.       console.log(val);
  17.       return Q.when('Last');
  18.   })
  19.   .then(function doLast(val){
  20.       console.log('Here we are at: ' + val);
  21.   })
  22.   .then(function(val){
  23.     console.log(val==undefined);
  24.   });
  25.  
  26. doFirst()
  27. .then(result => doNext(result)
  28. .then(nextResult => doLast(nextResult)
  29. .then(val => console.log(val === undefined));
  30.  
  31. async lifecycleMethod() {
  32.   const val = await doFirst();
  33.   const nextVal = await doNext(val);
  34.   const lastVal = await doLast(nextVal);
  35.   return val === undefined;
  36. }
  37.  
  38. const [val, nextVal, lastVal] = Promise.all([getVal(), getNextVal(), getLastVal()]);
  39.  
  40. getVal() {
  41.   return new Promise(function(resolve,reject){
  42.    const workDone = true; // some time consuming work
  43.       if(workDone){
  44.       //invoke resolve function passed
  45.      
  46.       resolve('success promise completed')
  47.    }
  48.    else{
  49.       reject('ERROR , work could not be completed')
  50.    }
  51.   })
  52. }
  53. ...doNext(val)
  54.  
  55. getVal()
  56. .then(doNext)
  57. .then(doLast)
  58. .then(() => {
  59.   console.log(val === undefined);
  60. });
  61. https://javascript.info/promise-chaining
RAW Paste Data
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. OK, I Understand
Top