Snippets tagged “lambda”
20 snippets use this tag.
- Break or return from Java 8 stream forEach?Java
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.
- Combine two columns of text in pandas dataframePython
In pandas, you can use the str.cat() function to combine the values of two columns of text into a single column.
- Convert all strings in a list to intPython
In Python, you can use the map() function along with the built-in int() function to convert all strings in a list to integers.
- Getting key with maximum value in dictionary?Python
You can use the built-in max() function in Python to get the key with the maximum value in a dictionary.
- Getting the index of the returned max or min item using max()/min() on a listPython
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.
- How do I efficiently iterate over each entry in a Java Map?Java
There are several ways to iterate over the entries in a Map in Java. Here are some options:
- How do I sort a dictionary by key?Python
In Python, dictionaries are unordered collections of key-value pairs.
- How do I sort a dictionary by value?Python
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.
- How do I sort a list of dictionaries by a value of the dictionary?Python
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.
- How to apply a function to two columns of Pandas dataframePython
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.
- How to for each the hashmap?Java
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:
- How to sort a list of objects based on an attribute of the objects?Python
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.
- How to sort a list/tuple of lists/tuples by the element at a given index?Python
You can use the sorted() function with the key parameter to specify a function that extracts the element at the desired index.
- How to sort a Map<Key> by values in JavaJava
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.
- How to use a Java8 lambda to sort a stream in reverse order?Java
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.
- Java 8 Lambda function that throws exception?Java
In Java 8, you can use a lambda expression to create a functional interface that throws an exception.
- Java List.contains(Object with field value equal to x)Java
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 vs mapPython
List comprehension and map() are both used to create new lists in Python, but they are used in slightly different ways.
- List comprehension vs. lambda + filterPython
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.
- Python list of dictionaries searchPython
Here is a code snippet that demonstrates how to search for a specific value in a list of dictionaries in Python: