/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

-2 votes440 views1 answer
Typescript mocha Cannot use import statement outside a module
TypeScript
16 votes204 views6 answers
React useEffect
TypeScript
1 vote205 views1 answer
If exists certain line in sql table java condition
TypeScript
0 vote200 views1 answer
Add custom text after title of products on achive page
TypeScript
11 votes195 views5 answers
Get query params from url angular
TypeScript
0 vote293 views1 answer
How to restrict alphabets in input field in angular
TypeScript
7 votes192 views3 answers
C# System.InvalidOperationException: 'session not created: This version of ChromeDriver only supports Chrome version 85 (SessionNotCreated)'
TypeScript
7 votes193 views3 answers
Typescript ignore
TypeScript
0 vote203 views1 answer
Angular minus date
TypeScript
0 vote206 views1 answer
Gang beasts türkiye discord
TypeScript