c# Programming Glossary: trygetvalue

Dictionary returning a default value if the key does not exist [duplicate]

http://stackoverflow.com/questions/2601477/dictionary-returning-a-default-value-if-the-key-does-not-exist

to dictionary IList othertype somethingElse if dictionary.TryGetValue key out somethingElse somethingElse new List othertype Both.. c# collections dictionary share improve this question TryGetValue will already assign the default value for the type to the dictionary.. the type to the dictionary so you can just use dictionary.TryGetValue key out value and just ignore the return value. However that..

How to show that the double-checked-lock pattern with Dictionary's TryGetValue is not threadsafe

http://stackoverflow.com/questions/2624301/how-to-show-that-the-double-checked-lock-pattern-with-dictionarys-trygetvalue-i

that the double checked lock pattern with Dictionary's TryGetValue is not threadsafe Recently I've seen some C# projects that.. static object Create string key object val if _cache.TryGetValue key out val lock _lock if _cache.TryGetValue key out val .. if _cache.TryGetValue key out val lock _lock if _cache.TryGetValue key out val val new object factory construction based on key..

Recreating a Dictionary from an IEnumerable<KeyValuePair<>>

http://stackoverflow.com/questions/2636603/recreating-a-dictionary-from-an-ienumerablekeyvaluepair

into a Dictionary string ArrayList so that I can use TryGetValue method public IEnumerable KeyValuePair string ArrayList GetComponents..

Are .Net switch statements hashed or indexed?

http://stackoverflow.com/questions/3366376/are-net-switch-statements-hashed-or-indexed

System.Collections.Generic.Dictionary`2 string int32 TryGetValue 0 1 L_0098 brfalse.s L_00da L_009a ldloc.3 L_009b switch L_00be..

Does C# have a way of giving me an immutable Dictionary?

http://stackoverflow.com/questions/35002/does-c-sharp-have-a-way-of-giving-me-an-immutable-dictionary

TKey key throw new InvalidOperationException public bool TryGetValue TKey key out TValue value return _dict.TryGetValue key out.. bool TryGetValue TKey key out TValue value return _dict.TryGetValue key out value public ICollection TValue Values get return _dict.Values..

Returning a default value. (C#)

http://stackoverflow.com/questions/367378/returning-a-default-value-c

my own dictionary and I am having trouble implementing the TryGetValue function. When the key isn't found I don't have anything to.. K V IDictionary K V bool IDictionary K V .TryGetValue K key out V value return false .... c# generics default value.. K V IDictionary K V bool IDictionary K V .TryGetValue K key out V value value default V return false .... share..

multimap in .NET

http://stackoverflow.com/questions/380595/multimap-in-net

key key HashSet TValue container null if this.TryGetValue key out container container new HashSet TValue base.Add key.. key bool toReturn false HashSet TValue values null if this.TryGetValue key out values toReturn values.Contains value return toReturn.. key key HashSet TValue container null if this.TryGetValue key out container container.Remove value if container.Count..

Multi Value Dictionary?

http://stackoverflow.com/questions/3850930/multi-value-dictionary

void Add TKey k TValue v can be a optimized a little with TryGetValue this is for clarity if _data.ContainsKey k _data k .Add v else..

Is there an IDictionary implementation that returns null on missing key instead of throwing?

http://stackoverflow.com/questions/538729/is-there-an-idictionary-implementation-that-returns-null-on-missing-key-instead

that instead will return default T I know about the TryGetValue method but that's impossible to use with linq. Would this efficiently..

Object cache for C#

http://stackoverflow.com/questions/581119/object-cache-for-c-sharp

public void Remove T value LinkedListNode T node if index.TryGetValue value out node data.Remove node index.Remove value public.. key lruList.Remove key return existed public bool TryGetValue TKey key out TValue value return data.TryGetValue key out value.. bool TryGetValue TKey key out TValue value return data.TryGetValue key out value public ICollection TValue Values get return data.Values..

Why && and not &

http://stackoverflow.com/questions/7331686/why-and-not

handy in the following circumstance string value if dict.TryGetValue key out value value.Contains test Do Something TryGetValue returns.. key out value value.Contains test Do Something TryGetValue returns false if the supplied key is not found in the dictionary... nature of value.Contains test is only executed when TryGetValue returns true and thus value is not null . If you would use the..

What is more efficient: Dictionary TryGetValue or ContainsKey+Item?

http://stackoverflow.com/questions/9382681/what-is-more-efficient-dictionary-trygetvalue-or-containskeyitem

is more efficient Dictionary TryGetValue or ContainsKey Item From MSDN's entry on Dictionary.TryGetValue.. or ContainsKey Item From MSDN's entry on Dictionary.TryGetValue Method This method combines the functionality of the ContainsKey.. for Boolean types and null for reference types. Use the TryGetValue method if your code frequently attempts to access keys that..