hashtable Questions
4
Solved
It's usually said that inserting and finding a string in a hash table is O(1). But how is hash key of a string made? Why it's not considered O(L), length of string?
It is clear to me that why for i...
2
Solved
I read from python3 document, that python use hash table for dict(). So the search time complexity should be O(1) with O(N) as the worst case. However, recently as I took a course, the teacher says...
Speed asked 3/3, 2020 at 18:28
1
Solved
I have a class Table:
@dataclass(frozen=True, eq=True)
class Table:
name: str
signature: Dict[str, Type[DBType]]
prinmary_key: str
foreign_keys: Dict[str, Type[ForeignKey]]
indexed: List[str]...
Lest asked 18/2, 2020 at 21:35
3
Solved
I have hundreds of keys for example like:
redapple
maninred
foraman
blueapple
i have data related to these keys, data is a string and has related key at the end.
redapple: the-tree-has-redap...
2
Solved
I was going through some examples in powershell and see the usage of both @() and @{}. Doing a quick google search on the difference tells me that one is an array and another is hashtable.
Could yo...
Unsavory asked 15/1, 2020 at 14:3
7
Solved
This is the set of result from my database
print_r($plan);
Array
(
[0] => Array
(
[id] => 2
[subscr_unit] => D
[subscr_period] =>
[subscr_fee] =>
)
[1] => Array
(
[i...
5
Solved
I'm pretty new to the Java World (since I'm writing primary in C/C++). I'm using maps in my apps.
Since java.util.Map is abstract I need to instantiate it's implementation. Usually I use HashMap li...
Aludel asked 20/12, 2012 at 14:18
2
Solved
I am seeing some seemingly very weird behavior with a hash table I am sorting and then trying to review the results. I build the hash table, then I need to sort that table based on values, and I se...
Hedda asked 27/12, 2019 at 9:26
17
Solved
We require a script that simulates associative arrays or map-like data structure for shell scripting. Can anyone let's know how it is done?
Coriss asked 27/3, 2009 at 7:37
3
Solved
I'm looking for a monad-free, constant access query O(1) associative array.
Consider the hypothetical type:
data HT k v = ???
I want to construct an immutable structure once:
fromList :: Folda...
Abstractionist asked 31/8, 2016 at 0:29
35
Solved
What are the differences between a HashMap and a Hashtable in Java?
Which is more efficient for non-threaded applications?
Forepeak asked 2/9, 2008 at 20:12
4
Solved
Filtering a Hashtable using GetEnumerator always returns a object[] instead of a Hashtable:
# Init Hashtable
$items = @{ a1 = 1; a2 = 2; b1 = 3; b2 = 4}
# apply a filter
$filtered = $items.GetEnum...
Ule asked 3/3, 2016 at 21:18
4
Solved
My Hash Table implementation has a function to resize the table when the load reaches about 70%. My Hash Table is implemented with separate chaining for collisions.
Does it make sense that I should...
Attack asked 12/4, 2010 at 21:44
1
Solved
I've been getting an error running Invoke-Command where the script block takes a parameter of type dictionary:
Cannot process argument transformation on parameter 'dictionary'.
Cannot convert t...
Phore asked 20/8, 2019 at 11:46
7
Solved
I am curious how java generates hash values by using hashCode() method of the Object API ?
4
Solved
I'm learning C now coming from knowing perl and a bit python. I did a quick search and found there is no explicit hash/dictionary as in perl/python and I saw people were saying you need a function ...
3
Solved
In PowerShell, how do you check if a variable is a hashtable, whether it be ordered or not?
In the first instance, I was testing if an ordered hashtable was of type Hashtable, but it seems that it...
Wireman asked 24/7, 2019 at 10:46
3
Solved
I have a map X and I'm trying to get a set of the keys satisfying a certain condition, something like this:
Map.Keys X
|> Set.filter (fun x -> ...)
...but I cannot find the way to get the ...
16
Solved
I'm basically looking for a way to access a hashtable value using a two-dimensional typed key in c#.
Eventually I would be able to do something like this
HashTable[1][false] = 5;
int a = HashTab...
Shulamite asked 27/3, 2009 at 14:18
6
Solved
From the book CLRS ("Introduction to Algorithms"), there are several hashing functions, such as mod, multiply, etc.
What hashing function does Java use to map the keys to slots?
I have seen ther...
1
Solved
I was wondering how python dictionaries work under the hood, particularly the dynamic aspect?
When we create a dictionary, what is its initial size?
If we update it with a lot of elements, I suppos...
Petta asked 12/5, 2019 at 9:46
3
Solved
I have a runbook running on Azure. I get a data type System.Collections.Generic.Dictionary`2[System.String,System.String], but I need convert it to System.Collections.Hashtable.
I find a example u...
Burial asked 8/2, 2018 at 6:41
3
Solved
I have a theoretical problem - how to reference a hash table during its initialization, for example, to compute a member based other already stated members.
Remove-Variable myHashTable -ErrorActio...
Maravedi asked 31/7, 2016 at 15:46
5
Solved
I have a Javascript hash table, like so:
var things = [ ];
things["hello"] = {"name" : "zzz I fell asleep", "number" : 7};
things["one"] = {"name" : "something", "number" : 18};
things["two"] = {"...
Prepay asked 8/5, 2010 at 3:35
5
Solved
Can somebody explain the main differences between (advantages / disadvantages) the two implementations?
For a library, what implementation is recommended?
Distributive asked 31/3, 2010 at 20:13
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