How do I reverse the contents of a file?

How do I reverse the contents of a file?

5 ways to reverse the order of file content

1. tac command is the reverse of cat.
2. This option uses a combination of commands to reverse the file order.
3. sed is the most trickiest of all.
4. awk solution is a pretty simple one.
5. perl solution is pretty simple due to the reverse function of perl.

How do you print a reverse line in Python?

“how to print something backwards in python” Code Answer’s

1. str=”Python” # initial string.
2. stringlength=len(str) # calculate length of the list.
3. slicedString=str[stringlength::-1] # slicing.
4. print (slicedString) # print the reversed string.

How do I sort a list alphabetically in Linux?

Sort lines of a text file

1. To sort the file in alphabetical order, we can use the sort command without any options:
2. To sort in reverse, we can use the -r option:
3. We can also sort on the column.
4. Blank space is the default field separator.
5. In the picture above, we have sorted the file sort1.

How to reverse the content of the file and print it?

Recommended: Please try your approach on {IDE} first, before moving on to the solution. Initialise previous length of the text as 0. Find the length of the current line and add it to the previous length. This given the next starting index of the new line. Repeat the above steps till the end of the file.

Is it safe to reverse a line in a file?

Now that you have a complete line, you can tackle reversing it separate from reading the file. This is the destructive version, string gets chopped up with null bytes. It’s possible to do this non-destructively and I might edit it later. Since input and reversed are the same length, using strcpy with no bounds is safe.

How to reverse a string one by one?

Initially, reverse the individual words of the given string one by one, for the above example, after reversing individual words the string should be “i ekil siht margorp yrev hcum”. Reverse the whole string from start to end to get the desired output “much very program this like i” in the above example.

How to print the last line of a file?

Now rewind your file pointer and place the last pointer of the text to arr [K – 1] where K is the length of the array using fseek (). Print the length of the last line and decrease K by 1 for printing the next last line of the file.