fizzbuzz extrapolation function - sample for article at ditam.github.io

extrapolateFizzBuzz.js

function extractPatterns(sample){
	var markers = {};
	  sample.forEach(function(element, i){
		if(isNaN( Number(element) )){
		  var parts = element.split(/(?=[A-Z])/);
		  parts.forEach(function(part){
			if(!markers[part]){
			  markers[part] = [];
			}
			markers[part].push(i+1);
		  });
		}
	});
	var markersArray = [];
	for(key in markers){
		if(markers.hasOwnProperty(key)){
			markersArray.push({
				marker: key,
				matchingElements: markers[key]
			});
		}
	}
	return markersArray;
}
  
function getPredicate(divisor){
    return function(element){
        return !(element%divisor);
    }
}

function generatePossiblePatterns(length){
	var generatedPatterns = [];
    for(var i=1;i<=length;i++){
        var predicate = getPredicate(i);
        var interval = [];
        for(var j=1;j<=length;j++){interval.push(j);}
        var outcome = interval.filter(function(element){
             return predicate(element);
        });
		generatedPatterns.push(outcome);
    }
	return generatedPatterns;
}

function fizzBuzz(length, markers){
	var range = [];
	for(var i=1;i<=length;i++){ range.push(i); }
	range.map(function(i){
		return markers.reduce(function(output,marker){
			if(i%marker.number === 0){
				output+=marker.marker;
			}
			return output;
		},'');
	})
	.map(function(output, index){
		return output == ''? (index+1) : output;
	})
	.forEach(function(output){
		console.log(output);
	});
}

function extrapolateFizzBuzz(sampleOutputs, length){
	var extractedPatterns = extractPatterns(sampleOutputs);
	var generatedPatterns = generatePossiblePatterns(sampleOutputs.length);

	var markers = extractedPatterns.map(function(ePattern){
		return {
			marker: ePattern.marker,
			number: generatedPatterns.filter(function(gPattern){
				return ePattern.matchingElements.every(function(element, index){
					return gPattern[index] === element;
				});
			})[0][0]
		}
	});
	
	fizzBuzz(length, markers);	
}

extrapolateFizzBuzz([1,2,'Fizz',4,'Buzz'], 100);