pairs using recursion
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const a = ['A','B','C','D','E'];
function split(a,p)
{
if(a.length==0) return;
else {
let a1 = a[0];
let b = a[1];
a.splice(0,2);
p.push([a1,b]);
console.log(a,p)
split(a,p);
return p;
}
}
console.log(split(a,[]));
JavaScript
INFO