5bdbc87dfb
Wire arrays into the prototype chain (Array.prototype → Object.prototype), add the Array global with isArray(), and implement callback-based methods (map, forEach, filter, find, findIndex, some, every, reduce, reduceRight, sort) plus simple methods (includes, lastIndexOf, reverse, shift, unshift). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
7 lines
188 B
JavaScript
7 lines
188 B
JavaScript
var a = [1, 2, 3, 2, 1];
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console.log(a.lastIndexOf(2));
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console.log(a.lastIndexOf(2, 2));
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console.log(a.lastIndexOf(4));
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console.log([].lastIndexOf(1));
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console.log(a.lastIndexOf(1, -3));
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