Duplicate all elements in the array
The solution to this problem doesn't make any sense!!!
If you are using the word "duplicate" to mean multiply by 2, then the correct answer is [2,4,6], not [1,4,6]
Calculate the Levenshtein distance between two strings
Project Euler: Problem 9, Pythagorean numbers
Flip the vector from right to left
Calculate the average value of the elements in the array
Converts numbers into characters
Calculate the square root of a number
calculate the length of matrix
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