Conti NPM | npm.io

conti

A primitive JavaScript asynchronous function manager.

Install

npm install conti

Examples

var conti = require("conti");

sequential execution

conti.exec([
  function(done){
    setTimeout(done, 1000);
  },
  function(done){
    setTimeout(done, 1000);
  }
], function(err){
  if( err ){
    throw new Exception(err);
  }
  console.log("done after 2 seconds");
});

parallel execution

conti.execPara([
  function(done){
    setTimeout(done, 1000);
  },
  function(done){
    setTimeout(done, 1000);
  }
], function(err){
  if( err ){
    throw new Exception(err);
  }
  console.log("done after 1 second");
});

sequential forEach

conti.forEach([1,2,3], function(ele, done){
  setTimeout(done, ele*1000);
}, function(err){
  if( err ){
    throw new Exception(err);
  }
  console.log("done after 6 seconds");
});

parallel forEach

conti.forEachPara([1,2,3], function(ele, done){
  setTimeout(done, ele*1000);
}, function(err){
  if( err ){
    throw new Exception(err);
  }
  console.log("done after 3 seconds");
});

parallel map

conti.mapPara([1,2,3], function(ele, cb){
  setTimeout(function(){
    cb(undefined, ele*10);
  }, 1000);
}, function(err, result){
  if( err ){
    throw new Exception(err);
  }
  console.log(result, "after 1 second"); // result is [10, 20, 30]
})

dynamically add to a list of asynchronous calls that are invoked sequentially

I found this function to be useful while coding for single page applications.

conti.enqueue(function(done){
  console.log("first start");
  setTimeout(done, 1000);
}, function(err){ console.log("first end"); });
conti.enqueue(function(done){
  console.log("second start");
  setTimeout(done, 1000);
}, function(err){ console.log("second end"); });

// first start
// first end (after 1 second)
// second start
// second end (after another 1 second)