How to python map in Bash

The Python map() function is a built-in function that applies a given function to each item of an iterable (such as a list, tuple, or set) and returns a new iterable with the results. The map() function takes two arguments: the first argument is the function to apply, and the second argument is the iterable to apply the function to. The function can be a built-in function or a user-defined function. The map() function returns a map object, which is an iterator that can be converted to a list, tuple, or set. The map() function is useful for applying a function to every element of a list or other iterable without having to write a loop. Keep reading below to learn how to python map in Bash.

Python ‘map’ in Bash With Example Code

Python’s `map()` function is a powerful tool for transforming data. Did you know that you can use `map()` in Bash as well? In this post, we’ll explore how to use Python’s `map()` function in Bash.

First, let’s review what `map()` does. The `map()` function applies a given function to each item of an iterable (e.g. a list) and returns a new iterable with the results. For example, let’s say we have a list of numbers and we want to square each number:


numbers = [1, 2, 3, 4, 5]
squared_numbers = map(lambda x: x**2, numbers)
print(list(squared_numbers))


This would output `[1, 4, 9, 16, 25]`.

Now, let’s see how we can use `map()` in Bash. Bash has a built-in command called `mapfile` that reads lines from standard input into an array. We can use this command to read lines from a file and apply a function to each line.

For example, let’s say we have a file called `names.txt` with the following contents:

“`
Alice
Bob
Charlie
“`

We can use `mapfile` to read these names into an array and convert them to uppercase using `map()`:


mapfile -t names < names.txt map() { echo "${@^^}" } map "${names[@]}"

This would output:

```
ALICE
BOB
CHARLIE
```

In this example, we define a Bash function called `map()` that takes an array as an argument and applies the `^^` operator to each element to convert it to uppercase. We then call this function with the `names` array as an argument.

In conclusion, Python's `map()` function can be a powerful tool for transforming data in Bash as well as in Python. By using Bash's `mapfile` command and defining a custom `map()` function, we can easily apply a function to each element of an array.

Equivalent of Python map in Bash

In conclusion, the equivalent of the Python map function in Bash is the "xargs" command. This command allows us to apply a specific command or function to each element of a list or array. By using the "xargs" command, we can easily manipulate and transform data in Bash, just like we would with the map function in Python. Whether you're working with large datasets or just need to perform a simple operation on a list of items, the "xargs" command is a powerful tool that can help you get the job done quickly and efficiently. So, if you're looking for a way to apply a function to each element of a list in Bash, give the "xargs" command a try and see how it can simplify your workflow.