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1: The dynamic adjustment usually double the size of array when it needs more space in push(), instead of in pop().we begin by deleting the item in the head then descend halve when the array size is too large, you will see that the appropriate test is whether the stack size is less than one-fourth the array size 2: In order to avoid Loitering, WE commonly by setting the array entry corresponding to the popped item to null
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1: The dynamic adjustment usually double the size of array when it needs more space in push(), instead of in pop().we begin by deleting the item in the head then descend halve when the array size is too large, you will see that the appropriate test is whether the stack size is less than one-fourth the array size
2: In order to avoid Loitering, WE commonly by setting the array entry corresponding to the popped item to null