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How to determine if a dictionary has some key?

By : user6096624
Date : September 14 2020, 01:00 PM
it helps some times haskey will check whether some collection has a mapping for a given key:
code :
julia> d
Dict{Int64,String} with 2 entries:
  2 => "two"
  1 => "one"

julia> haskey(d, 1)

julia> haskey(d, 3)

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Determine whether a key is present in a dictionary

By : ifn
Date : March 29 2020, 07:55 AM
To fix the issue you can do
code :
if 'name' in mydict:

Determine if type is dictionary

By : MohammadSadat
Date : March 29 2020, 07:55 AM
Any of those help How can I determine if Type is of Dictionary<,>
code :
Type t = dict.GetType();
bool isDict = t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Dictionary<,>);
Type keyType = t.GetGenericArguments()[0];
Type valueType = t.GetGenericArguments()[1];

C# Determine if Dictionary Contains All of a Set of Values

By : Digitallife
Date : March 29 2020, 07:55 AM
this will help The problem is that you are passing the wrong thing to the Contains. Contains is supposed to receive an item to look for in the collection but you are passing an entire collection. Because you are using ArrayList, where the items are stored as object you are not receiving a compile time error but it just doesn't work (and the items are compared using object's compare which is to check references.
You can use Linq to do it this way:
code :
string key = "Key1";
var key1Collection = vertices[key].Cast<object>().ToList();
foreach(var item in vertices.Where(x => x.Key != key ))
    //If you want that all the items of the collection will be in the "Key1" collection:
    if(item.Value.Cast<object>().All(x => key1Collection.Contains(x))
         //Do stuff

    //Or if you want that at least 1 of the items of the collection will be in the "Key1" collection:
    if(item.Value.Cast<object>().Any(x => key1Collection.Contains(x))
         //Do stuff

How do I determine which dictionary has the most entries?

By : user2375799
Date : March 29 2020, 07:55 AM
Hope that helps As said in the comments, an example would ease the process. BUT if I got you right, you have a dictionary- the key is a name of a country(string) and the value is another dictionary, in which the key is the kind of an airport (string) and the value is a list that concludes the names of all the airports from the same kind in the chosen country. What you are looking for is the country with the most airports from the kind of seaplane bases:
code :
maxAirports = 0 #A variable that would flag what are the most airports from the sea plane kinds (initiated to 0)
maxCountry = "" #A variable that would specify the name of the country that was the last one to change the value of maxAirports (initiated to "")

first_dictionary = {your keys and values...}
for country, airports in first_dictionary.items():
    for airport_type, airport_names in airports.items():
        if airport_type == seaPlane_Base:
            if maxAirports < len(airport_names):
                maxAirports = len(airport_names)
                maxCountry = country

print ("The country with the most Sea Plane Bases is " + maxCountry + " and it has " + maxAirports  " airports in total!)

Determine if a value is in a list value in a dictionary

By : kryhear
Date : September 23 2020, 12:00 AM
seems to work fine You're checking if a string is in a list of lists plus a few strings, so it would return false unless you try to search for those lone strings .
You'd either have to lookup the key, then check if your string is in that key's list value, or loop over all values (which you're already doing) instead like so, then check if it's in the list of the dictionary value
code :
if b % 3 == 0:
  for _, values in xdict.items():
    for k in (a[i:i + n] for i in range(0, len(a), n)):
      if k in values:
        print(lookup_dict[k], end=" ")
        print("I hate u")
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