How-to articles, tricks, and solutions about DICTIONARY
How to sort a Map<Key, Value> by values in Java
To sort a Map<Key, Value> by values in Java, you can create a custom comparator that compares the values and pass it to the sort() method of the Map.Entry class.
I'm getting Key error in python
A KeyError in Python is raised when a dictionary key is not found in the dictionary.
Iterating over dictionaries using 'for' loops
To iterate over a dictionary using a for loop, you can use the .items() method to get a list of the dictionary's keys and values, and then iterate over that list.
Java - How to create new Entry (key, value)
To create a new key-value pair in a Map in Java, you can use the put method.
Python list of dictionaries search
Here is a code snippet that demonstrates how to search for a specific value in a list of dictionaries in Python:
Reverse / invert a dictionary mapping
Here's an example of how you can reverse or invert a dictionary mapping in Python:
Should I use 'has_key()' or 'in' on Python dicts?
It is recommended to use the in keyword to check if a key exists in a Python dict, rather than the has_key() method.