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#! /usr/bin/node
"use strict"
// by Frank Tan
// https://stackoverflow.com/questions/38400594/javascript-deep-comparison
function deepEqual(a,b)
{
if( (typeof a == 'object' && a != null) &&
(typeof b == 'object' && b != null) )
{
var count = [0,0];
for( var key in a) count[0]++;
for( var key in b) count[1]++;
if( count[0]-count[1] != 0) {return false;}
for( var key in a)
{
if(!(key in b) || !deepEqual(a[key],b[key])) {return false;}
}
for( var key in b)
{
if(!(key in a) || !deepEqual(b[key],a[key])) {return false;}
}
return true;
}
else
{
return a === b;
}
}
function shortestdistance(a0) {
if (a0.length % 2 != 0) {
return [];
}
let a = a0;
a.sort();
let out = [];
for (let i = 0; i < a.length; i += 2) {
if (a[i] != a[i + 1]) {
return [];
}
out.push([a[i], a[i]]);
}
return out;
}
if (deepEqual(shortestdistance([3, 2, 3, 2, 2, 2]), [[2, 2], [2, 2], [3, 3]])) {
process.stdout.write("Pass");
} else {
process.stdout.write("FAIL");
}
process.stdout.write(" ");
if (deepEqual(shortestdistance([1, 2, 3, 4]), [])) {
process.stdout.write("Pass");
} else {
process.stdout.write("FAIL");
}
process.stdout.write("\n");
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