Pyramid test

pyramid.js

function space_front(size, n) {
	return size - n;
}

function space_mid(n) {
	return (2 * n) - 3;
}

function is_top(n) {
	return n > 1;
}

function asterisk() {
	return '*';
}

function asterisk_extra(n) {
	return (n > 1) ? asterisk() : '';
}

function space(n) {
	return (n > 0) ?
		' '.repeat(n) : '';
}

function pyramid(size) {
	for (var i = 1; i < size+1; i++) {
		console.log(
			space(space_front(size, i)) +
			asterisk(i) +
			space(space_mid(i)) +
			asterisk_extra(i)  + "\n"
		);
	}
}