JavaScript Check if property name is array index check property name javascript,check property name,check property name

I want to assign some properties to an array, but only if they are array indices. Otherwise some implementations might switch the underlying structure to a hash table and I don't want that.

For example, these are array indices: "0", "1", "2", "3", "4", "4294967294"

But these are not: "abcd", "0.1", "-0", "-1", " 2", "1e3", "4294967295"

Is there an easy way to test if a string is an array index?

Answer:1

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