Acid
60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
package linear
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import (
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"errors"
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)
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// Stack -> creates a Stack with no size
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type Stack[T any] struct {
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Capacity int
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Container []T
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}
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// StackFixed -> creates Stack with a fixed size
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func StackFixed[T any](value int) *Stack[T] {
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return &Stack[T]{
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Capacity: value,
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Container: make([]T, 0, value),
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}
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}
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// Push -> Appends value to stack returns error
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// If using StackFixed errors when over capacity
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func (s *Stack[T]) Push(value T) error {
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if s.Capacity > 0 && (len(s.Container) >= s.Capacity) {
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return errors.New("Error max capasity exeded")
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}
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s.Container = append(s.Container, value)
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return nil
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}
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// Pop -> returns value,error and removes last index
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func (s *Stack[T]) Pop() (T, error) {
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var zero T
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if len(s.Container) <= 0 {
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return zero, errors.New("Error Empty Stack")
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}
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last := s.Container[len(s.Container)-1]
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s.Container = s.Container[:len(s.Container)-1]
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return last, nil
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}
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// Clear -> clears the stack
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func (s *Stack[T]) Clear() {
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s.Container = []T{}
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}
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// Peek -> returns top item
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func (s *Stack[T]) Peek() T {
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return s.Container[len(s.Container)-1]
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}
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// First -> returns bottom item
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func (s *Stack[T]) First() T {
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return s.Container[0]
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}
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