WeakHashMap uses weak reference for keys, which means if the key object doesn't have any reference then both key/value mapping will become eligible for garbage collection. Difference between HashMap and WeakHashMap ?Īns. Name few Collections Map implementations ? This will result in compilation error as Polymorphism cannot be performed on Object types. Map> inventoryManagerCountMap = new HashMap>() Īns.
Tables have no fixed measure and can become dependent on our need. Lua utilizes acquainted clusters and which can be recorded with numbers as well as with strings aside from nil. Can we add duplicate keys in a HashMap ? What will happen if we attempt to add duplicate values ? Lua Table Insert are the solitary information structure accessible in Lua that encourages us make various sorts like clusters and word references.
Which Java collection class can be used to maintain the entries in the order in which they were last accessed? Upto n levels ( where n is the average size of the word in dictionary. Z( key ) -> hashmap (key-za, value (hashmap(key-zaa,value) Which interfaces are implemented by PrinterStateReasons?Īns.[ PrintServiceAttribute, Serializable, Severity>, Attribute, Cloneable, Map hashmap (key-aa, value (hashmap(key-aaa,value)ī ( key ) -> hashmap (key-ba, value (hashmap(key-baa,value) Which interfaces are implemented by HashMap? Hashtable is synchronized whereas HashMap is not. HashTable and HashMap allow Key-Value pairs.ĭ. HashMap allows null values whereas Hashtable doesn’t allow null values.Ĭ. The new element will replace the existing element.ī. Compiler will identify the problem and will throw an error.Īns.
The new element will replace the existing element.ĭ. print table lua how to get a random number in lua lua add table to value lua not equal lua string to number roblox on touch script Lua array add item lua click detection lua in pairs lua round number lua loop through table sleep function lua how to make a part rotate roblox lua how to concatenate string Roblox Lerp Example in lua. It won't add the new Element without any exception.Ĭ.
If we try to add duplicate key to the HashMap, What will happen ?ī. HashSet is maintained as HashMap by Java with values of the HashSet as Keys of the HashMap and value of the HashMap as the constant PRESENT. How is HashSet maintained in memory by Java ?Īns. ConcurrentHashMap is a hashMap that allows concurrent modifications from multiple threads as there can be multiple locks on the same hashmap. If we attempt to do so, the previous value for the key is overwritten.Īns. No, We cannot have duplicate keys in HashMap. Can we add duplicate keys in a HashMap ? What will happen if we attempt to add duplicate values ?Īns.
Here we discuss the Introduction, syntax, How to Work of table structure in Lua programming and example with code implementation respectively.Q8. The Lua table is a built-in data structure is in Lua programming, which is used to create an array and dictionary in Lua. And farther also we can see that the element is added and the element is removed from an array. Farther the table length is printing by using “#” operator. Print("The length of the city array is : ", #city )Īs in the above Lua program code, a non-empty table is created that is a city without any keys as an array, it takes index number for the key by default, so 1 2, 3,4 are keys and “Bangalore”, “Delhi”, “Mumbai”, “Hyderabad” are the associative values, which are printing farther by using the keys, as we can see in the output. the length of an array get by using the # operator In Lua the table is created by įor key, value in pairs(city) do print( key, value ) end The table data structure used in programming to create an array and dictionary. How Table Structure works in Lua Programming?
value – This parameter specifies the value to be stored for the specific key.It can be number or string type but key does not support nil. key – This is not an optional type parameter, that specifies the key or index for which the associated value stores.
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