Given a square matrix of at least 3x3, print its elements following a spiral path

print-spiral-array.js

function print(o){
	var
		m = o.length >> 1,
		r = m,
		c = m + 1;
		p = function(){
			console.log(o[r][c]);
		},
		left = function(i){
			for(; c > i; p(--c));
		},
		right = function(i){
			for(; c < i; p(++c));
		},
		up = function(i){
			for(; r > i; p(--r));
		},
		down = function(i){
			for(; r < i; p(++r));
		};
	for(var i = 0; ++i <= m; ){
		left(m - i);
		down(m + i);
		right(m + i);
		up(m - i);
	}
	left(0);
}

print([
	[ 1,  2,  3,  4,  5],
	[ 6,  7,  8,  9, 10],
	[11, 12, 13, 14, 15],
	[16, 17, 18, 19, 20],
	[21, 22, 23, 24, 25]
]);