var arraysByKey = {};
for (var i=0; i<ar.length; i++) {
var key = ar[i].split("||")[1];
if (key in arraysByKey)
arraysByKey[key].push( ar[i] );
else
arraysByKey[key] = [ ar[i] ];
}
The result (arraysByKey
) will look like this then:
{
"10": [
"8A8EAB5A-E0D2-4AA8-96A0-42686FF5EB0C||10"
],
"20": [
"C241C12A-45FD-40FF-B26E-B879107E584D||20"
],
"33": [
"AB1BB99D-4396-415A-A5D8-1BEF3E0149CE||33"
],
"85": [
"ADE54113-53D1-4F26-A01C-48EBE37E3CE8||85",
"DB500FD1-5988-4202-A4AA-727AC29AC67A||85"
],
"200": [
"50C29E8A-16C7-4FC2-A186-C3D65F23C627||200",
"70C79BBB-14C7-4F34-346B-CSSSDFVFZZZ7||200"
]
}
If you only want arrays where "duplicate values" exists, just filter the result:
for (var key in arraysByKey)
if (arraysByKey[key].length < 2)
delete arraysByKey[key];