key-equality-1.js - mozsearch

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// Different representations of the same number or string are treated as the same Map key.

var m = new Map;

var test = function test(a, b) {

    m.set(a, 'secret');

    assertEq(m.get(b), 'secret');

    m.set(b, 'password');

    assertEq(m.get(a), 'password');

    assertEq(a, b);

};

// Float and integer representations of the same number are the same key.

test(9, Math.sqrt(81));

// Ordinary strings and ropes are the same key.

var a = Array(1001).join('x');

var b = Array(501).join('x') + Array(501).join('x');

test(a, b);

// Two structurally different ropes with the same characters are the same key.

a = "";

b = "";

for (var i = 0; i < 10; i++) {

    a = Array(501).join('x') + a;

    b = b + Array(501).join('x');

test(a, b);