Checks if x is a valid array index for arr.
x
arr
The value to check if it's a valid index.
The array to check against.
true if x is a valid index for arr, false otherwise.
true
false
if arr is not an array.
isArrIdx(1, ['a', 'b']) => trueisArrIdx(2, ['a', 'b']) => falseisArrIdx(-1, ['a', 'b']) => falseisArrIdx(0.5, ['a', 'b']) => false Copy
isArrIdx(1, ['a', 'b']) => trueisArrIdx(2, ['a', 'b']) => falseisArrIdx(-1, ['a', 'b']) => falseisArrIdx(0.5, ['a', 'b']) => false
Checks if
xis a valid array index forarr.