Snippets tagged “lambda”

To break or return from a Java 8 Stream.forEach() operation, you can use the break or return statements as you would normally do in a loop.

In pandas, you can use the str.cat() function to combine the values of two columns of text into a single column.

In Python, you can use the map() function along with the built-in int() function to convert all strings in a list to integers.

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

You can use the enumerate() function along with max() or min() to get the index of the maximum or minimum item in a list in Python.

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

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.

To apply a function to two columns of a Pandas DataFrame, you can use the apply() method of the DataFrame and pass the function as an argument.

To iterate over the key-value pairs in a HashMap in Java, you can use the forEach() method and provide a lambda expression as an argument. Here's an example:

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.

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 use a Java 8 lambda to sort a stream in reverse order, you can use the sorted() method of the Stream interface and pass a lambda function that compares the elements in reverse order.

In Java 8, you can use a lambda expression to create a functional interface that throws an exception.

To check if a Java List contains an object with a specific field value, you can use the List.stream().anyMatch() method along with a lambda expression to filter the elements in the list based on the field value.

List comprehension and map() are both used to create new lists in Python, but they are used in slightly different ways.

List comprehension and the combination of lambda functions and the filter() function in Python are both used to filter a list and return a new list with only the elements that satisfy a certain condition.

Here is a code snippet that demonstrates how to search for a specific value in a list of dictionaries in Python: