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Saturday, December 17, 2016

Codefights isSumOfConsecutive2(n)


//sample solution

function isSumOfConsecutive2(n) {
    var waysToRepresent = 0;
    for(i=2;i<n;i++){
    var testValue = Math.floor(n/i)-2;
        if(testValue<1){ continue; };
        var total = sumArray(consecutiveArray(testValue,i));
        if(total==n){
        waysToRepresent++;
        } else if(total>n){
        break;
        }
    }
    for(i=2;i<n;i++){
    var testValue = Math.floor(n/i)-1;
        if(testValue<1){ continue; };
        var total = sumArray(consecutiveArray(testValue,i));
        if(total==n){
        waysToRepresent++;
        } else if(total>n){
        break;
        }
    }
    for(i=2;i<n;i++){
    var testValue = Math.floor(n/i);
        if(testValue<1){ continue; };
        var total = sumArray(consecutiveArray(testValue,i));
        if(total==n){
        waysToRepresent++;
        } else if(total>n){
        break;
        }
    }
   
    return waysToRepresent;
}

function consecutiveArray(start,size){
var someArray=[];
    for(i=0;i<size;i++){
    someArray.push(start+i);
    }
    //document.writeln(someArray," total = ");
    return someArray;
}


function sumArray(someArray){
var total=0;
for(i=0; i<someArray.length; i++){
    total=total+someArray[i];
    }
    //document.writeln(total,"<br/>");
    return total;
}

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