delete-named-names.js

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var a = ['p', 'q', 'r', 's', 't'];

var o = {p:1, q:2, r:3, s:4, t:5};

for (var i in o) {

    delete o.p;

    delete o.q;

    delete o.r;

    delete o.s;

    delete o.t;

for (var i of a)

    assertEq(o.hasOwnProperty(i), false);