function makeMap(str) {
	var obj = {},
		items = str.split(","),
		i;
	for (i = 0; i < items.length; i++) {
		obj[items[i]] = true;
	}
	return obj;
}
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.