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dynamic_array.go
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114 lines (81 loc) · 1.91 KB
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package dynamic-array
import (
"errors"
)
var defaultCapacity = 10
type dynamicArray struct {
size int
capacity int
elementData []interface{}
}
func (da *dynamicArray) put(index int, element interface{}) error {
err := da.checkRangeFromIndex(index)
if err != nil {
return err
}
da.elementData[index] = element
return nil
}
func (da *dynamicArray) add(element interface{}) {
if da.size == da.capacity {
da.newCapacity()
}
da.elementData[da.size] = element
da.size++
}
func (da *dynamicArray) remove(index int) error {
err := da.checkRangeFromIndex(index)
if err != nil {
return err
}
copy(da.elementData[index:], da.elementData[index+1:da.size])
da.elementData[da.size-1] = nil
da.size--
return nil
}
func (da *dynamicArray) get(index int) (interface{}, error) {
err := da.checkRangeFromIndex(index)
if err != nil {
return nil, err
}
return da.elementData[index], nil
}
func (da *dynamicArray) isEmpty() bool {
return da.size == 0
}
func (da *dynamicArray) getData() []interface{} {
return da.elementData[:da.size]
}
func (da *dynamicArray) checkRangeFromIndex(index int) error {
if index >= da.size || index < 0 {
return errors.New("index out of range")
}
return nil
}
func (da *dynamicArray) newCapacity() {
if da.capacity == 0 {
da.capacity = defaultCapacity
} else {
da.capacity = da.capacity << 1
}
newDataElement := make([]interface{}, da.capacity)
copy(newDataElement, da.elementData)
da.elementData = newDataElement
}
// func main() {
// numbers := dynamicArray{}
// fmt.Println(numbers.isEmpty())
// numbers.add(10)
// numbers.add(20)
// numbers.add(30)
// numbers.add(40)
// numbers.add(50)
// fmt.Println(numbers.isEmpty())
// fmt.Println(numbers.getData())
// numbers.remove(1)
// fmt.Println(numbers.getData())
// numberFound, _ := numbers.get(1)
// fmt.Println(numberFound)
// numbers.put(0, 100)
// fmt.Println(numbers.getData())
// }