Top "Hashmap" questions

What exactly is bucket in hashmap?

Recently, in an interview I was asked, what exactly is a bucket in hashmap? Whether it is an array or …

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HashMap vs LinkedHashMap performance in iteration over values()

Is there any performance difference between HashMap and LinkedHashMap for traversal through values() function?

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Is gcc std::unordered_map implementation slow? If so - why?

We are developing a highly performance critical software in C++. There we need a concurrent hash map and implemented one. …

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in CoffeeScript, how can I use a variable as a key in a hash?

eg: So: foo = "asdf" {foo: "bar"} eval foo # how do I get {"asdf": "bar"} ? # this will throw parse error: {(eval …

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Java putting Hashmap into Treemap

I am currently reading 2 million lines from a textfile as asked in the previous question Java Fastest way to read …

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How to iterate through a Hashmap, print the key/value and remove the value in Rust?

This should be a trivial task in any language. This isn't working in Rust. use std::collections::HashMap; fn do_…

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Why does Map.of not allow null keys and values?

With Java 9, new factory methods have been introduced for the List, Set and Map interfaces. These methods allow quickly instantiating …

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Hashtable, HashMap, HashSet , hash table concept in Java collection framework

I am learning Java Collection Framework and got moderated understanding. Now, when I am going a bit further I got …

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Iterating through a LinkedHashMap in reverse order

I have a LinkedHashMap: LinkedHashMap<String, RecordItemElement> that I need to iterate through from a given key's position, …

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Writing from hashmap to a txt file

I have a hashMap of Integer,String (K,V) and want to write only the string values to a file (…

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