def delete_from_index(self, index = -1, noCopy = False):
"""
Deletes the number from a given index
Input:
index - The index to delete from
noCopy - A flag used to stop the saving of the sequence
- Set to true when the method is called by another member method
Returns:
The modified sequence
Raises IndexError if the given index is invalid
"""
Validator.validate_index(self.sequence_store.sequence, index)
self.sequence_store.sequence.pop(index)
if(not noCopy):
self._save_sequence()
return self.sequence_store.sequence
def insert_at_index(self, n, index = None, noCopy = False):
"""
Inserts an element at a given index.
If the index is left on it's default value(-1), then the element is simply appended
Returns:
- The original sequence, if the indexes fail validation
- The modified sequence
Raises IndexError if the given index is invalid
"""
if(index == None or index == len(self.sequence_store.sequence)): index = len(self.sequence_store.sequence) # We consider this value implicitly valid
else: Validator.validate_index(self.sequence_store.sequence, index)
self.sequence_store.sequence.insert(index, n)
if(not noCopy):
self._save_sequence()
return self.sequence_store.sequence
def gcd_subsequence(self, index_start = 0, index_end = -1):
"""
Prints the gcd of all the numbers in the given subsequence
Input:
index_start - The starting index
index_end - The ending index
Returns:
The gcd of all elements between the given indexes
Raises IndexError if any of the indexes are invalid
"""
result = 0
Validator.validate_index(self.sequence_store.sequence, index_start, index_end)
for i in range(index_start, index_end):
result = gcd(self.sequence_store.sequence[i], self.sequence_store.sequence[i+1])
return result
def display_prime(self, index_start = -1, index_end = -1):
"""
Prints a list containing all prime numbers in the given subsequence
Input:
index_start - The starting index
index_end - The ending index
Returns:
A list of all prime numbers between the given indexes
Raises IndexError if any of the indexes are invalid
"""
result_list = []
Validator.validate_index(self.sequence_store.sequence, index_start, index_end)
for i in range(index_start, index_end + 1):
if(isPrime(self.sequence_store.sequence[i])):
result_list.append(self.sequence_store.sequence[i])
return result_list
def max_subsequence(self, index_start = 0, index_end = -1):
"""
Prints the greatest element of all the numbers in the given subsequence
Input:
index_start - The starting index
index_end - The ending index
Returns:
The greatest element of all elements between the given indexes
Raises IndexError if any of the indexes are invalid
"""
Validator.validate_index(self.sequence_store.sequence, index_start, index_end)
result = self.sequence_store.sequence[index_start]
for i in range(index_start + 1, index_end + 1):
if(self.sequence_store.sequence[i] > result):
result = self.sequence_store.sequence[i]
return result
def delete_subsequence(self, index_start, index_end, noCopy = False):
"""
Removes the subsequence contained within the given indexes
Input:
index_start - The starting index
index_end - The end index
noCopy - A flag used to stop the saving of the sequence
- Set to true when the method is called by another member method
Returns:
The modified sequence
Raises IndexError if any of the indexes are invalid
"""
Validator.validate_index(self.sequence_store.sequence, index_start, index_end)
i = index_end - index_start + 1
while(i > 0):
sequence = self.delete_from_index(index_start, True)
i = i - 1
if(not noCopy):
self._save_sequence()
return sequence