Round-robin tournament schedule: Difference between revisions

=={{header|jq}}==

{{Works with|jq}}

'''Works with gojq, the Go implementation of jq'''

'''Adapted from [[#Wren|Wren]]'''

<syntaxhighlight lang="jq">

def lpad($len): tostring | ($len - length) as $l | (" " * $l) + .;

def rotate: .[-1:] + .[:-1];

def roundRobin($n):

{$n, lst: [range(2; $n+1)]}

| if $n % 2 == 1

then .lst += [0] # 0 denotes a bye

| .n += 1

end

| foreach range(1; .n) as $r (.;

.emit = "Round \($r|lpad(3)): "

| ([1] + .lst) as $lst2

| reduce range(0; .n/2) as $i (.;

.emit += " (\($lst2[$i]|lpad(2)) vs \($lst2[.n - 1 - $i]|lpad(2)))")

| .lst |= rotate )

| .emit ;

"Round robin for 12 players:",

roundRobin(12),

"\n\nRound robin for 5 players (0 denotes a bye):\n",

roundRobin(5)

</syntaxhighlight>

{{output}}

Essentially the same as for [[#Wren|Wren]].