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Avoid Using New Array() in JavaScript
- akully 6y agoI first heard this from Doug Crockford, a senior architect for Javascript +1 for the corroboration
- yogiUSA 6y agoThank you! I was going through the differences and it started acting weirdly so I thought let's share this.
- DXA9zE 6y agoThere is nothing wrong with using new Array() to construct array of known capacity. By default, I think JS literal arrays will have a capacity of 4, so especially if you know you will have less than four elements, or a non power of two number of elements, this can be seen as a micro-optimization. `bluebird` uses new Array() extensively, e.g. https://github.com/petkaantonov/bluebird/blob/12154adb5016609901550aad5250045670644dd4/src/util.js#L73 https://github.com/petkaantonov/bluebird/blob/12154adb501660...