var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

export var randomString = function(length) {
	var result = [];
	for (var i = 0; i < length; i++) {
		var k = Math.floor(Math.random() * chars.length);
		result.push(chars[k]);
	}
	return result.join('');
};

export var shuffle = function(arr) {
	return arr.sort(() => Math.random() - 0.5);
};

export var randomChoice = function(arr) {
	var i = Math.floor(Math.random() * arr.length);
	return arr[i];
};