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How-to articles, tricks, and solutions about DICTIONARY

Getting key with maximum value in dictionary?

You can use the built-in max() function in Python to get the key with the maximum value in a dictionary.

python dictionary max

How can I add new keys to a dictionary?

To add a new key-value pair to a dictionary in Python, you can use the update() method or simply assign a value to a new key using square brackets [].

python dictionary lookup

How can I get list of values from dict?

You can use the values() method to get a list of values from a dictionary:

list python dictionary

How can I initialise a static Map?

To initialize a static Map in Java, you can use the Map interface's of method, which was added in Java 9. The of method creates an immutable Map with a fixed set of key-value pairs.

java collections initialization dictionary idioms

How can I make a dictionary (dict) from separate lists of keys and values?

You can use the zip function to create a dictionary from separate lists of keys and values like this:

list python dictionary

How can I remove a key from a Python dictionary?

You can use the del statement to remove a key-value pair from a dictionary in Python.

python dictionary unset

How can I sort Map values by key in Java?

To sort the values of a Map by key in Java, you can use the TreeMap class, which is a Map implementation that maintains its entries in ascending key order.

java dictionary hashmap

How do I convert a Map to List in Java?

You can use the entrySet() method of the Map interface to get a Set view of the mappings contained in the map, and then create a List from this set using the new

java list collections dictionary

How do I efficiently iterate over each entry in a Java Map?

There are several ways to iterate over the entries in a Map in Java. Here are some options:

java collections dictionary iteration

How do I merge two dictionaries in a single expression?

You can use the update() method of one dictionary to merge the key-value pairs from another dictionary into it.

python dictionary merge