tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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WeakMap-constructor-3.js (654B)

      1 // WeakMap can take an argument that is an array of singleton arrays.
      2 
      3 var k1 = {};
      4 var k2 = {};
      5 var k3 = {};
      6 
      7 var arr = [[k1], [k2]];
      8 
      9 var m = new WeakMap(arr);
     10 
     11 assertEq(m.has(k1), true);
     12 assertEq(m.has(k2), true);
     13 assertEq(m.has(k3), false);
     14 assertEq(m.get(k1), undefined);
     15 assertEq(m.get(k2), undefined);
     16 assertEq(m.get(k3), undefined);
     17 
     18 var arraylike1 = {
     19  0: k1,
     20  1: undefined
     21 };
     22 var arraylike2 = {
     23  0: k2,
     24 };
     25 
     26 arr = [arraylike1, arraylike2];
     27 
     28 m = new WeakMap(arr);
     29 
     30 assertEq(m.has(k1), true);
     31 assertEq(m.has(k2), true);
     32 assertEq(m.has(k3), false);
     33 assertEq(m.get(k1), undefined);
     34 assertEq(m.get(k2), undefined);
     35 assertEq(m.get(k3), undefined);