Code Golf October 2016

October 2016 - Sum Mixed Array.md

October 2016 - Sum Mixed Array

Task

Given an array of integers as strings and numbers, return the sum of the array values as if all were numbers.

Return the answer as a number, not a string.

Examples:

([9, 3, '7', '3']) => 22
(['5', '0', 9, 3, 2, 1, '9', 6, 7]) => 42
(['3', 6, 6, 0, '5', 8, 5, '6', 2,'0']) => 41

*^You can assume that you will always recieved valid input

About Code Golf Scotland

Language: PHP

Length: 37 (or 0, because it just calls a builtin function)

Solution:

function x($a){return array_sum($a);}

Language: Hack

Length: 19 (or 0, because it just calls a builtin function)

Solution:

$a==>array_sum($a);

Language: PHP
Length: 29
use function array_sum as x;

Language: PHP
Length: 18
$x = 'array_sum';

Language: Perl 6 (subroutine)
Length: 17 13
Solution:

sub Σ{@_.sum}

Demo:

perl6 -e 'my @x = "3", 6, 6, 0, "5", 8, 5, "6", 2,"0"; say Σ(@x); sub Σ{@_.sum}'
41

Language: Perl 6 (builtin)
Length: 0
Demo:

perl6 -e 'my @x = "3", 6, 6, 0, "5", 8, 5, "6", 2,"0"; say @x.sum; say [+] @x;'
41
41

@Kolin - excellent work. Iterating on it...

Language: PHP

Length: 14

Solution:

$x=@array_sum;

Language: Python
Length: 26
Solution:

x=lambda a:sum(map(int,a))

Language: Ruby
Length: 26
Solution:

$*.map(&:to_i).inject(&:+)

Language: Bash
Length: 23
Solution:
Save this to a file, make it executable with chmod + <file>, then pass it some arguments and query the exit code with echo $?.

exit $(IFS=+;bc<<<"$*")

The above is limited to a maximum sum of 255 because it uses exit, but it can be shortened, and allow for higher sum values, but the above is the safest method since you don't particularly want to be modifying IFS.

Language: Bash
Length: 15
Solution:
Save this to a file, make it executable with chmod +x <file>, and then pass it some arguments.

IFS=+;bc<<<"$*"