async.forEach(
  ${1:array}, 
  function(item,callback){
    ${2:callback();}
  }, 
  function(err){
    // if any of the saves produced an error, err would equal that error
    if(err){
      ${3}
    }else{
      ${4}
    }
  }
);

async.parallel({
    ${1:one}: function(callback){
        ${2://body}
    },
    ${3:two}: function(callback){
        ${4://body}
    },
},
function(err, ${5:results}) {
    // results now equals: {one: 1, two: 2}
    $6
});

async.series({
  ${1:one}: function(callback){
      ${2:callback(null,{})}
  },
  ${3:two}: function(callback){
      ${4:callback(null,{})}
  },
},
function(err, ${5:results}) {
  // results is now equal to: {one: 1, two: 2}
  ${6}
});

async.waterfall([
  function(callback){
      callback(null, ${1:'one'}, ${2:'two'});
  },
  function(${3:arg1}, ${4:arg2}, callback){
      callback(null, ${5:'three'});
  },
  function(${6:arg1}, callback){
      // arg1 now equals 'three'
      callback(null, ${7:'done'});
  }
], function (err, ${8:result}) {
  // result now equals 'done'    
});