How to loop through key/value object in Javascript? [duplicate]

Beware of properties inherited from the object’s prototype (which could happen if you’re including any libraries on your page, such as older versions of Prototype). You can check for this by using the object’s hasOwnProperty() method. This is generally a good idea when using for…in loops: var user = {}; function setUsers(data) { for (var … Read more

Set iteration order varies from run to run

The reason the set iteration order changes from run-to-run appears to be because Python uses hash seed randomization by default. (See command option -R.) Thus set iteration is not only arbitrary (because of hashing), but also non-deterministic (because of the random seed). You can override the random seed with a fixed value by setting the … Read more

How to iterate std::set?

You must dereference the iterator in order to retrieve the member of your set. std::set<unsigned long>::iterator it; for (it = SERVER_IPS.begin(); it != SERVER_IPS.end(); ++it) { u_long f = *it; // Note the “*” here } If you have C++11 features, you can use a range-based for loop: for(auto f : SERVER_IPS) { // use … Read more