By definition, the length property of an array is an unsigned, 32-bit integer that is always numerically greater than the highest index in the array. The value ... ... <看更多>

When you call Array.apply with an array or an object with a length property Array is going to use the length to explicitly set each value of the new array ... ... <看更多>

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samuelstein commented on Aug 4, 2017. this changes only the length and does not add null values. ... <看更多>

This creates an array with n + 1 elements, and a length of n + 1. ... JavaScript arrays are referred to as “sparse,” which means that elements in an array ... ... <看更多>