Simple sequence

Repo with a few simple functions to help manage flow.

eachSeries

This function runs a function(s), and checks the return value to determine if the next should be run. It's useful when building a sequence, but you need to stop execution once you return something falsey.

var fns = {
	step1a: function step1a(){
		console.log('step1a: ');
		return true;
	},
	step1b: function step1b(){
		console.log('step1b: ');
		return true;
	}
}

var out = seq.eachSeries([
	function step1(){
		return seq.eachSeries([  // This is an embedded list of functions 
			fns.step1a,            // for better orginization of subroutines
			fns.step1b
		])
	},
	function step2(){
		console.log('step2: ');
		return false;  // Execution would stop here and not go to step3
	},
	function step3(){
		console.log('step3: ');
		return true;
	}
]);

console.log('out: ', out);
// The variable out collects the return values from each of the 
// functions run to be used later if desired.

seriesAsync

This function runs a function(s) sequentially, but only calls the next one in the list when the done() method is called.

seq.seriesAsync([
	function seriesFn1(){
		var self = this;
		setTimeout(function(){
			console.log('seriesFn1: '  );
			self.done();  //  After two seconds, the done method is called, advancing to seriesFn2()
		}, 2000);
	},
	function seriesFn2(){
		var self = this;
		setTimeout(function(){
			console.log('seriesFn2: ');
			self.done();  //  After two seconds, the done method is called, advancing to seriesFn3()
		}, 2000)
	},
	function seriesFn3(){
		console.log('seriesFn3: ');
	}	
]);