key-value Archives - IT Nursery

What is the difference between a map and a dictionary?

I know a map is a data structure that maps keys to values. Isn’t a dictionary the same? What is the difference between … Read more

A KeyValuePair in Java [duplicate]

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This question already has answers here: A Java collection of value pairs? (tuples?) (21 answers) Closed 2 years ago. I’m looking for a … Read more

How do you create a dictionary in Java? [closed]

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It’s difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably … Read more

for each loop in Objective-C for accessing NSMutable dictionary

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I am finding some difficulty in accessing mutable dictionary keys and values in Objective-C. Suppose I have this: NSMutableDictionary *xyz=[[NSMutableDictionary alloc] init]; I … Read more

Java – How to create new Entry (key, value)

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I’d like to create new item that similarly to Util.Map.Entry that will contain the structure key, value. The problem is that I can’t … Read more

How to iterate over associative arrays in Bash

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Based on an associative array in a Bash script, I need to iterate over it to get the key and value. #!/bin/bash declare … Read more

How to create dictionary and add key–value pairs dynamically?

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From post: Sending a JSON array to be received as a Dictionary<string,string> I’m trying to do this same thing as that post. The … Read more

The default for KeyValuePair

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I have an object of the type IEnumerable<KeyValuePair<T,U>> keyValueList, I am using var getResult= keyValueList.SingleOrDefault(); if(getResult==/*default */) { } else { } How … Read more

Java Class that implements Map and keeps insertion order?

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I’m looking for a class in java that has key-value association, but without using hashes. Here is what I’m currently doing: Add values … Read more