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Not in scope: `HashMap.lookup'


Not in scope: `HashMap.lookup'

By : Tim Lewy
Date : November 19 2020, 01:01 AM
I think the issue was by ths following , I am having trouble with HashMap.lookup function. Please give your advise on how to fix following code (I am getting Not in scope: `HashMap.lookup' error): , Try to add
code :
import qualified Data.HashMap.Strict as HashMap


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Hashmap reverse key lookup

Hashmap reverse key lookup


By : tmeyer
Date : March 29 2020, 07:55 AM
this one helps. Consider using a Guava BiMap instead of a HashMap:
code :
String key = map.inverse.get(theValue);
Object lookup using a HashMap

Object lookup using a HashMap


By : Allasra dounia
Date : November 04 2020, 08:17 AM
I wish this help you Yes, HashMap guarantees to find the exact match, not just one with an identical hash code.
Hash-based containers do it by invoking equals() on the lookup key and the candidate from one of its hash buckets, to ensure that there is an actual match. That is the reason behind having to always override both equals and hashCode methods, as described in the documentation:
Does Argument-Dependent Lookup go before normal scope lookup?

Does Argument-Dependent Lookup go before normal scope lookup?


By : Bunda Rifki
Date : March 29 2020, 07:55 AM
Any of those help ADL doesn't go before, it's not preferred specially; the names found by ADL will be considered in addition to the names found by the usual name lookup.
Should I use two Hashmap for fast lookup on two entities instead of linear search of one hashmap?

Should I use two Hashmap for fast lookup on two entities instead of linear search of one hashmap?


By : jillian pena
Date : March 29 2020, 07:55 AM
it helps some times It is not always possible to optimize for everything; there's very often a tradeoff between time and space, or between consistency and availability, or between the time needed for one operation and the time needed for a different operation, . . .
In your case, you have been asked to make an "optimized" solution, and you're faced with such a tradeoff:
How to lookup in a static hashmap?

How to lookup in a static hashmap?


By : Lukáš Stuchlík
Date : October 11 2020, 04:00 PM
wish helps you You could take a property accessor with brackets.
code :
var inputMap = {
    0: 'a',
    1: 'b',
    2: 'c'
};

console.log(inputMap[2]);
var inputMap = {
    0: 'a',
    1: 'b',
    2: 'c'
};

console.log(Reflect.get(inputMap, 2));
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