How-to articles, tricks, and solutions about SORTING

In PHP, you can group an array of arrays (subarrays) by the value of a specific key in each subarray using the array_reduce() function.

To sort a List alphabetically in Java, you can use the Collections.sort method and pass in your List as an argument.

In Python, dictionaries are unordered collections of key-value pairs.

You can use the sorted() function and pass it the dictionary, along with the key parameter set to a lambda function that returns the value from the dictionary.

To sort a list of dictionaries by a value of the dictionary, you can use the sorted() function and specify the key parameter to be a lambda function that returns the value you want to sort by.

In Java, you can convert a Collection (such as Set, Queue, etc.) to a List using the following methods:

To sort a HashMap in Java, you can use the TreeMap class, which is a Map implementation that maintains its entries in ascending order, sorted according to the keys.

You can use the sort method of a list and pass in a key argument, which is a function that takes an object and returns the value on which you want to sort the list.

To sort a List or ArrayList in Java, you can use the sort method of the Collections class from the java.util package. The sort method takes a List and sorts it in ascending order according to the natural ordering of its elements.

You can use the sorted() function with the key parameter to specify a function that extracts the element at the desired index.

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.

To sort an ArrayList in Java, you can use the Collections.sort method.

To sort a Pandas DataFrame based on the values in a column, you can use the sort_values() method of the DataFrame.

To use a Comparator in Java to sort a list of objects, you can use the Collections.sort method and pass it a List and a Comparator.

To sort an array in descending order in Java, you can use the Arrays.sort method and pass it a comparator that compares the elements in reverse order.

To sort an ArrayList of custom objects by a property, you can use the Collections.sort method and pass it a custom Comparator.

To sort a HashMap by values in Java, you can use the Map.Entry interface and the Comparator interface to create a comparator that compares the values in the map.

There is no SortedList class in the Java standard library because the List interface already provides a way to store elements in a specific order.