/TypeScript/Check if breckets clossing properly

Check if breckets clossing properly

def valid_paren(input_str):
  # Declaraing a stack.
  stack = []
  # Iterating over the entire string
  for paren in input_str:
    # If the input string contains an opening parenthesis,
    # push in on to the stack.
    if paren == '(' or paren == '[' or paren == '{':
      stack.append(paren)
    else:
      # In the case of valid parentheses, the stack cannot be 
      # be empty if a closing parenthesis is encountered.
      if not stack:
        print(input_str, "contains invalid parentheses.")
        return
      else:
        # If the input string contains a closing bracket,
        # then pop the corresponding opening parenthesis if
        # present.
        top = stack[-1]
        if paren == ')' and top == '(' or \
        paren == ']' and top == '[' or \
        paren == '}' and top == '{':
          stack.pop()
  # Checking the status of the stack to determine the
  # validity of the string.
  if not stack:
    print(input_str, "contains valid parentheses.")
  else:
    print(input_str, "contains invalid parentheses.")

input1 = "{{}}()[()]"
input2 = "{][}"
input3 = ")"
valid_paren(input1)
valid_paren(input2)
valid_paren(input3)

Check if breckets clossing properly

def valid_paren(input_str):
  # Declaraing a stack.
  stack = []
  # Iterating over the entire string
  for paren in input_str:
    # If the input string contains an opening parenthesis,
    # push in on to the stack.
    if paren == '(' or paren == '[' or paren == '{':
      stack.append(paren)
    else:
      # In the case of valid parentheses, the stack cannot be 
      # be empty if a closing parenthesis is encountered.
      if not stack:
        print(input_str, "contains invalid parentheses.")
        return
      else:
        # If the input string contains a closing bracket,
        # then pop the corresponding opening parenthesis if
        # present.
        top = stack[-1]
        if paren == ')' and top == '(' or \
        paren == ']' and top == '[' or \
        paren == '}' and top == '{':
          stack.pop()
  # Checking the status of the stack to determine the
  # validity of the string.
  if not stack:
    print(input_str, "contains valid parentheses.")
  else:
    print(input_str, "contains invalid parentheses.")

input1 = "{{}}()[()]"
input2 = "{][}"
input3 = ")"
valid_paren(input1)
valid_paren(input2)
valid_paren(input3)

input4 = "([)]"valid_paren(input4)input5 = '() [{}]'valid_paren(input5)

Similar codes

0 vote96 views1 answer
How to sort documents in firebase database date wise
TypeScript
0 vote106 views1 answer
Ionic 4 reset form
TypeScript
0 vote99 views1 answer
Em is relative to its font size
TypeScript
0 vote125 views1 answer
Import type * as PrettyFormat from './types';
TypeScript
1 vote106 views1 answer
Error: ./src/main.ts Module build failed (from ./node_modules/@ngtools/webpack/src/ivy/index.js): TypeError: Cannot read property 'createUniqueName' of undefined
TypeScript
6 votes98 views1 answer
File C:\Users\SHUBHAM KUNWAR\AppData\Roaming\npm\nodemon.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at https:/go.microsoft.com/fwlink/?LinkID=135170.
TypeScript
0 vote99 views1 answer
Compare two lists and remove duplicates java
TypeScript
0 vote138 views1 answer
Number square n times in typescript
TypeScript
1 vote109 views1 answer
Ts class static function call inside class extends
TypeScript
0 vote137 views1 answer
OpenCV(4.5.3) C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-q3d_8t8e\opencv\modules\imgproc\src\shapedescr.cpp:315: error: (-215:Assertion failed) npoints >= 0 && (depth == CV_32F || depth == CV_32S) in function 'cv::contourArea'
TypeScript