tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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WeakMap-constructor-2.js (665B)

      1 // The WeakMap constructor can take an argument that is an array of pairs.
      2 
      3 var k1 = {};
      4 var v1 = 42;
      5 var k2 = {};
      6 var v2 = 43;
      7 var k3 = {};
      8 
      9 var arr = [[k1, v1], [k2, v2]];
     10 
     11 var m = new WeakMap(arr);
     12 
     13 assertEq(m.has(k1), true);
     14 assertEq(m.has(k2), true);
     15 assertEq(m.has(k3), false);
     16 assertEq(m.get(k1), v1);
     17 assertEq(m.get(k2), v2);
     18 assertEq(m.get(k3), undefined);
     19 
     20 var arraylike1 = {
     21  0: k1,
     22  1: v1
     23 };
     24 var arraylike2 = {
     25  0: k2,
     26  1: v2
     27 };
     28 arr = [arraylike1, arraylike2];
     29 
     30 m = new WeakMap(arr);
     31 
     32 assertEq(m.has(k1), true);
     33 assertEq(m.has(k2), true);
     34 assertEq(m.has(k3), false);
     35 assertEq(m.get(k1), v1);
     36 assertEq(m.get(k2), v2);
     37 assertEq(m.get(k3), undefined);