[Solved] c++ removing whitespace fails by using iterators

Not only the commented line, but another will also fail if there is space in the begin of string. First line fail (to compile) because string::find_first_not_of return size_t. And construct string from two size just make no sense. Second line may fail because string::substr accept length (not end) as it’s second parameter. 1 solved c++ … Read more

[Solved] Java ArrayList and other stuff [closed]

You are having a method named getSpellEffect() inside the main() method. You cannot have methods inside methods. Check Methods inside methods import java.util.ArrayList; import java.util.Iterator; import java.util.List; public class SpellsList { static List<Spell> spellsList = new ArrayList<Spell>(); static { spellsList.add(new Spell(“Fireball”, “damage”, 5)); spellsList.add(new Spell(“Ice Storm”, “damage”, 8)); spellsList.add(new Spell(“Heal”, “heal”, 8)); } static String … Read more

[Solved] Why does my is random access iterator have to be of type auto when i traverse a vector?

You don’t have to use auto if you don’t want to, but you can of course. The type returned by std::vector<int>::begin() and std::vector<int>::end() is a std:vector<int>::iterator (or std:vector<int>::const_iterator, depending on context), it is not an int. You could as well have written this instead: for(vector<int>::iterator it=vect1.begin(); it<vect1.end();it++){ cout<<*it<<endl; } or for(vector<int>::const_iterator it=vect1.begin(); it<vect1.end();it++){ cout<<*it<<endl; } … Read more

[Solved] Ruby .each fails for single element

You got that exception because the class String has no instance method each: String.instance_methods.include?(:each) #=> false If packages is a string need to operate on an array comprised of that string alone. We can use the method Kernel#Array to write: Array(packages).each do |package| Array(packages) will return packages if packages is an array and will return … Read more

[Solved] The number of items printed from my vector is inconsistent with the supposed number of items IN the vector [closed]

When you execute these lines: vector<string> wordSets(24); wordSets.push_back(“CHICKEN”); wordSets has 24 empty items an the item “CHICKEN”. I suspect, you didn’t mean that. Changing the first line to: vector<string> wordSets; should fix the wrong number of items problem. If you want to reduce the number of times memory is allocated by calls to push_back, you … Read more

[Solved] How is transforming this iterator block a functional change?

The two are not equivalent. The semantics of how execution is deferred between the two Bar methods is different. Foo.Bar will evaluate Sequence into an IEnumerable value when you call Bar. Foo2.Bar2 will evaluate Sequence into the value in that variable when you enumerate the sequence returned by Bar2. We can write a simple enough … Read more

[Solved] How to iterate complicated List of Maps containing Maps

How about this? ArrayList<HashMap<String, HashMap<String, String>>> list = new ArrayList<>(); for (HashMap<String, HashMap<String, String>> m : list) { for (Map.Entry<String, HashMap<String, String>> e : m.entrySet()) { String key1 = e.getKey(); for (Map.Entry<String, String> me : e.getValue().entrySet()) { String key2 = me.getKey(); String value = me.getValue(); } } } Note that you really should be using … Read more

[Solved] Get Last element from unordered_set [closed]

In an unordered_set, the order of inserts does not necessarily correspond to the order that you will get when the set is iterated (hence the name “unordered”). Part of the reason why a bi-directional iterator is not supported(using a — operator) in this data structure is because being able to go backwards/forwards on an unordered_set … Read more