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Showing posts with the label fold command in Linux

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Mastering flat_map in Python with List Comprehension

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Introduction In Python, when working with nested lists or iterables, one common challenge is flattening them into a single list while applying transformations. Many programming languages provide a built-in flatMap function, but Python does not have an explicit flat_map method. However, Python’s powerful list comprehensions offer an elegant way to achieve the same functionality. This article examines implementation behavior using Python’s list comprehensions and other methods. What is flat_map ? Functional programming  flatMap is a combination of map and flatten . It transforms the collection's element and flattens the resulting nested structure into a single sequence. For example, given a list of lists, flat_map applies a function to each sublist and returns a single flattened list. Example in a Functional Programming Language: List(List(1, 2), List(3, 4)).flatMap(x => x.map(_ * 2)) // Output: List(2, 4, 6, 8) Implementing flat_map in Python Using List Comprehension Python’...
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The Real Command to Wrap Text in Linux

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Here is a command to wrap text in Linux. The wrapping means it prints it in fixed-width column. More importantly, it will not consider spaces between words. The command you need is FOLD.   Fold command in Linux Below, you will find two examples on usage of the FOLD command. These are helpful for your project where you need to write a shell script. Example-1 The following command displays a set of lines with ten characters in each line: x="aa bb cc d e f g h i j kk ll mm nn"  echo $x | fold -10 The output of the preceding code snippet is here: aa bb cc d e f g h i j kk ll m m nn ✏Related: How to Write Recursive Shell Script in Bash Terminal Example-2 As another example, consider the following code snippet: x="The quick brown fox jumps over the fat lazy dog. "  echo $x | fold -10 The output of the preceding code snippet is here: The quick brown fox jumps over the fat l azy dog. ✏References: List of complete ls commands in Linux Keep reading How to Work with Linux
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