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sAbakumoff/array_props.js

Last active October 9, 2016 02:25
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array_props.js
var a = new Array(1000*1000*1000 + 1);
a[0] = 'a'; a[110] = 'b'; a[900] = 'c';
Object.getOwnPropertyNames(a); // ["0", "110", "900", "length"]
// in operator automatically converts the left part to string
110 in a; // true
15 in a; // false
a[15] = 'd';
15 in a; // true
Object.getOwnPropertyNames(a); // ["0", "15", 110", "900", "length"]
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