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/*
Craziness to deal with the bolted on module systems that we use:
In browser: require.js, it uses a global function named 'define'
On server for tests: Node, it provides a module definition time object named 'exports'
*/
(function(factory) {
if (typeof define != 'undefined') {
define('util', factory);
} else {
if (typeof exports == 'object') {
var obj = factory();
for (var i in obj) {
exports[i] = obj[i];
}
}
}
})(function() {
return {
set_from_array: function (a) {
var ret = {};
for (var k = 0 ; k < a.length ; ++k) {
ret[a[k]] = 1;
}
return ret;
},
set_from_object: function(o) {
var ret = {}
for (var k in o) {
ret[k] = 1;
}
return ret;
},
set_diff: function(sa, sb) {
var ret = {a_b:[], b_a:[]};
var i;
for (i in sa) {
if (!(i in sb)) {
ret.a_b.push(i);
}
}
for (i in sb) {
if (!(i in sa)) {
ret.b_a.push(i);
}
}
return ret;
},
array_diff: function(aa, ab) {
var sa = set_from_array(aa);
var sb = set_from_array(ab);
return set_diff(sa, sb);
},
}});
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