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Code Issues Releases Wiki Activity

publish backlog of things

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osmarks
2022-02-05 14:45:04 +00:00
parent 78602eabd6
commit 95e84ceb80
47 changed files with 3147 additions and 13 deletions
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158
code-guessing/codexsoln.py Normal file
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# Programs are to validate JSON according to the JSON spec (https://www.json.org/), with the exception that you may assume that the string will consist entirely of the classic printable ASCII characters (codepoints 32-127, horizontal tabs, and newlines).
# You may additionally assume that the input will not be nested more than 16 levels.
def entry(string):
if string == "":
return True
elif string[0] == '{':
return entry_object(string)
elif string[0] == '[':
return entry_array(string)
elif string[0] == '"':
return entry_string(string)
elif string[0] in '-0123456789':
return entry_number(string)
elif string[0] == 't':
return entry_true(string)
elif string[0] == 'f':
return entry_false(string)
elif string[0] == 'n':
return entry_null(string)
else:
return False
def entry_object(string):
if string[0] != '{':
return False
string = string[1:]
if string[0] == '}':
return True
while True:
if not entry_string(string):
return False
if not entry_colon(string):
return False
if not entry(string):
return False
if string[0] == '}':
return True
if not entry_comma(string):
return False
def entry_array(string):
if string[0] != '[':
return False
string = string[1:]
if string[0] == ']':
return True
while True:
if not entry(string):
return False
if string[0] == ']':
return True
if not entry_comma(string):
return False
def entry_string(string):
if string[0] != '"':
return False
string = string[1:]
while True:
if string[0] == '"':
return True
if string[0] == '\\':
string = string[1:]
if string[0] == 'u':
string = string[1:]
if not string[0] in '0123456789abcdef':
return False
string = string[1:]
if not string[0] in '0123456789abcdef':
return False
string = string[1:]
if not string[0] in '0123456789abcdef':
return False
string = string[1:]
if not string[0] in '0123456789abcdef':
return False
string = string[1:]
elif string[0] == '"':
pass
elif string[0] == '\\':
pass
elif string[0] == '/':
pass
elif string[0] == 'b':
pass
elif string[0] == 'f':
pass
elif string[0] == 'n':
pass
elif string[0] == 'r':
pass
elif string[0] == 't':
pass
else:
return False
else:
string = string[1:]
def entry_number(string):
if string[0] not in '-0123456789':
return False
string = string[1:]
if string[0] == '.':
string = string[1:]
if string[0] not in '0123456789':
return False
string = string[1:]
if string[0] in 'eE':
string = string[1:]
if string[0] in '+-':
string = string[1:]
if string[0] not in '0123456789':
return False
string = string[1:]
if string[0] not in '0123456789':
return False
string = string[1:]
return True
def entry_colon(string):
if string[0] != ':':
return False
string = string[1:]
return True
def entry_comma(string):
if string[0] != ',':
return False
string = string[1:]
return True
def entry_true(string):
if string[0:4] != 'true':
return False
string = string[4:]
return True
def entry_false(string):
if string[0:5] != 'false':
return False
string = string[5:]
return True
def entry_null(string):
if string[0:4] != 'null':
return False
string = string[4:]
return True
def main():
string = input()
if entry(string):
print("Valid JSON")
else:
print("Invalid JSON")
if __name__ == "__main__":
main()