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master > master: code - stacks + queues data structures überarbeitet

This commit is contained in:
RLogik 2021-11-07 08:49:52 +01:00
parent 5c13f8d4cd
commit 8d2de4fa2b
4 changed files with 186 additions and 37 deletions
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81
code/golang/pkg/data_structures/queues/queues.go Normal file
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@ -0,0 +1,81 @@
package queues
/* ---------------------------------------------------------------- *
* IMPORTS
* ---------------------------------------------------------------- */
import (
"fmt"
"strings"
)
/* ---------------------------------------------------------------- *
* GLOBAL VARIABLES/CONSTANTS
* ---------------------------------------------------------------- */
//
/* ---------------------------------------------------------------- *
* TYPE
* ---------------------------------------------------------------- */
type QueueInt struct {
values *[]int
}
/* ---------------------------------------------------------------- *
* METHODS stacks
* ---------------------------------------------------------------- */
func CREATE() QueueInt {
return QueueInt{}
}
func (S *QueueInt) INIT() {
S.values = &[]int{}
}
func (S QueueInt) Length() int {
if S.values == nil {
return 0
}
return len(*S.values)
}
func (S QueueInt) String() string {
if S.EMPTY() {
return "-"
}
values := []string{}
n := S.Length()
for i := n - 1; i >= 0; i-- {
value := (*S.values)[i]
values = append(values, fmt.Sprintf("%v", value))
}
return fmt.Sprintf(strings.Join(values, " -> "))
}
func (S QueueInt) EMPTY() bool {
return S.Length() == 0
}
func (S *QueueInt) ENQUEUE(x int) {
if S.values == nil {
panic("Queue not initialised!")
}
*S.values = append(*S.values, x)
}
func (S *QueueInt) FRONT() int {
if S.EMPTY() {
panic("Cannot read from empty queue!")
}
return (*S.values)[0]
}
func (S *QueueInt) DEQUEUE() {
if S.EMPTY() {
panic("Cannot remove from empty queue!")
}
*S.values = (*S.values)[1:]
}

73
code/golang/pkg/data_structures/stacks/stacks.go
View File

@ -20,7 +20,7 @@ import (
* ---------------------------------------------------------------- */
type StackInt struct {
values []int
values *[]int
}
/* ---------------------------------------------------------------- *
@ -28,45 +28,54 @@ type StackInt struct {
* ---------------------------------------------------------------- */
func CREATE() StackInt {
return StackInt{
values: []int{},
return StackInt{}
}
func (S *StackInt) INIT() {
S.values = &[]int{}
}
func (S StackInt) Length() int {
if S.values == nil {
return 0
}
}
func (S *StackInt) INIT() StackInt {
return StackInt{
values: []int{},
}
}
func (S StackInt) EMPTY() bool {
return len(S.values) == 0
}
func (S *StackInt) PUSH(x int) {
S.values = append(S.values, x)
}
func (S *StackInt) TOP() int {
if S.EMPTY() {
panic("Cannot pop from empty stack!")
}
return S.values[len(S.values)-1]
}
func (S *StackInt) POP() int {
x := S.TOP()
S.values = S.values[:(len(S.values) - 1)]
return x
return len(*S.values)
}
func (S StackInt) String() string {
if len(S.values) == 0 {
if S.EMPTY() {
return "-"
}
values := []string{}
for _, value := range S.values {
for _, value := range *S.values {
values = append(values, fmt.Sprintf("%v", value))
}
return fmt.Sprintf(strings.Join(values, ", "))
}
func (S StackInt) EMPTY() bool {
return S.Length() == 0
}
func (S *StackInt) PUSH(x int) {
if S.values == nil {
panic("Stack not initialised!")
}
*S.values = append(*S.values, x)
}
func (S *StackInt) TOP() int {
if S.EMPTY() {
panic("Cannot read from empty stack!")
}
n := S.Length()
return (*S.values)[n-1]
}
func (S *StackInt) POP() {
if S.EMPTY() {
panic("Cannot remove from empty stack!")
}
n := S.Length()
*S.values = (*S.values)[:(n - 1)]
}

52
code/python/src/data_structures/queues.py Normal file
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@ -0,0 +1,52 @@
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# IMPORTS
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
from local.typing import *;
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# GLOBAL VARIABLES/CONSTANTS
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# CLASS Queue
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class Queue(object):
_initialised: bool;
values: List[int];
def __init__(self):
self._initialised = False;
def INIT(self):
self.values = [];
self._initialised = True;
def EMPTY(self) -> bool:
return not self._initialised or len(self.values) == 0;
def ENQUEUE(self, x: int):
if not self._initialised:
raise Exception('Queue not initialised!')
self.values.append(x);
def FRONT(self) -> int:
if self.EMPTY():
raise Exception('Cannot read from empty queue!')
return self.values[0];
def DEQUEUE(self) -> int:
if self.EMPTY():
raise Exception('Cannot remove from empty queue!')
self.values = self.values[1:];
def __str__(self) -> str:
if len(self.values) == 0:
return '-';
return ', '.join([str(x) for x in self.values]);

17
code/python/src/data_structures/stacks.py
View File

@ -18,26 +18,33 @@ from local.typing import *;
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class Stack(object):
_initialised: bool;
values: List[int];
def __init__(self):
self._initialised = False;
def INIT(self):
self.values = [];
self._initialised = True;
def EMPTY(self) -> bool:
return len(self.values) == 0;
return not self._initialised or len(self.values) == 0;
def PUSH(self, x: int):
if not self._initialised:
raise Exception('Stack not initialised!');
self.values.append(x);
def TOP(self) -> int:
if self.EMPTY():
raise Exception('Cannot pop from empty stack!')
raise Exception('Cannot read from empty stack!');
return self.values[-1];
def POP(self) -> int:
x = self.TOP()
self.values = self.values[:-1]
return x
if self.EMPTY():
raise Exception('Cannot remove from empty stack!');
self.values = self.values[:-1];
def __str__(self) -> str:
if len(self.values) == 0: