codility-solution1.js

/**
Solution for: http://codesnakers.com/projects/1.png
*/
function solution(ranks) {
    // write your code in JavaScript (Node.js 8.9.4)
	var len = ranks.length;
	if(len===undefined){
		return 0;
	}
	var keyArr = [];
	var temp;
	var soldierCount = 0;
	for(var i=0; i<len; i++){
		temp = keyArr[ranks[i]];
		keyArr[ranks[i]] = temp===undefined?1:(temp+1);
	}
	
	for(var i=0; i<keyArr.length-1; i++){
		temp = keyArr[i];
		if(temp===undefined){
			continue;
		}
		if(temp!==undefined && keyArr[i+1]!==undefined){
			soldierCount = soldierCount + temp;
		}
	}
	console.log(keyArr, soldierCount);
	return soldierCount;
}