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scala list recursive foldLeft

P46 Truth tables for logical expressions P47 Truth tables for logical expressions 2 P49 Gray code P50 Huffman code 该系列文章来自：http://aperiodic.net/phil/scala/s-99/

P36 Determine the prime factors of a given positive integer 2 P37 Calculate Eulers totient function phim improved P39 A list of prime numbers P40 Goldbachs conjecture

P31 Determine whether a given integer number is prime P32 Determine the greatest common divisor of two positive integer numbers P33 Determine whether two positive integer numbers are cop

P26 Generate the combinations of K distinct objects chosen from the N elements of a list P27 Group the elements of a set into disjoint subsets P28 Sorting a list of lists according to le

P21 Insert an element at a given position into a list P22 Create a list containing all integers within a given range P23 Extract a given number of randomly selected elements from a list

P16 Drop every Nth element from a list P17 Split a list into two parts P18 Extract a slice from a list P19 Rotate a list N places to the left P20 Remove the Kth element fro

P11 Modified run-length encoding P12 Decode a run-length encoded list P13 Run-length encoding of a list direct solution P14 Duplicate the elements of a list P15 Duplicate t

P06 Find out whether a list is a palindrome P07 Flatten a nested list structure P08 Eliminate consecutive duplicates of list elements P09 (**) Pack consecutive duplicates of list elements into sublists.

原文链接:http://aperiodic.net/phil/scala/s-99/P01 Find the last element of a list P02 Find the last but one element of a list P03 Find the Kth element of a list P04 Find the number of elements of a list P