Approximate word-spacing on browsers lacking sub-pixel precision

var wordSpacing = [2.333, -0.333, 1, 0.7, -0.25, 0.083].map(function (v) {
		return [v, 15 + Math.round(Math.random() * 4)];
	});

function truncate(x) {
	if (x > 0 && x < 0.1) {	
		return 0;
	}
	if (x < 0 && x > -0.1) {
		return 0;
	}
	return x;
}

wordSpacing.forEach(function (v) {
	var wordSpace = truncate(v[0]),
		spaces = v[1],
		integerWordSpace = Math.round(wordSpace),
		adjustment = wordSpace - integerWordSpace,
		integerAdjustment = adjustment < 0 ? Math.floor(adjustment) : Math.ceil(adjustment),
		totalAdjustment = Math.round(adjustment * spaces),
		i = 0, result = [];

	for (; i < spaces; i += 1) {
		result[i] = integerWordSpace;
		if (i * Math.abs(integerAdjustment) < Math.abs(totalAdjustment)) {
			result[i] += integerAdjustment;
		}
	}
	var actual = result.reduce(function (p, c) {
		return p + c
	}, 0) / result.length;

	console.log('spaces: ' + spaces + ', wordSpace: ' + wordSpace + ', actual: ' + actual);
	console.log(result);		
});