“binäre Suche in Python” Code-Antworten

iterative binäre Suche Python

def binary_search(a, key):
	low = 0
	high = len(a) - 1
	while low < high:
		mid = (low + high) // 2
		if key == a[mid]:
			return True
		elif key < mid:
			high = mid - 1
		else:
			low = mid + 1

	return False
webdevjaz

Python Binärsuche

def binary_search(arr, item):
	first = 0
	last = len(arr) - 1
	while(first <= last):
		mid = (first + last) // 2
		if arr[mid] == item :
			return True
		elif item < arr[mid]:
			last = mid - 1
		else:
			first = mid + 1	
	return False
Wrong Whale

Binär -Suche Python

#the best binary search you'll ever witness

def binary_search(arr, target):
    mid = arr[len(arr)//2]
    if mid == target:
        return True
    if len(arr) == 1 and mid != target:
        return False
    if mid < target:
        return binary_search(arr[len(arr)//2: len(arr)], target)
    else:
        return binary_search(arr[0:len(arr)//2], target)
Busy Bison

Python Binärsuche

#blog.icodes.tech
def binary_search(item,my_list):
    found=False
    first=0
    last=len(my_list)-1
    while first <=last and found==False:
        midpoint=(first+last)//2
        if my_list[midpoint]==item:
            found=True
        else:
            if my_list[midpoint]<item:
                first=midpoint+1
            else:
                last=midpoint-1
    return found
Fancy Fly

binäre Suche in Python

def binary_search_recursive(list_of_numbers, number, start=0, end=None):

    # The end of our search is initialized to None. First we set the end to the length of the sequence.
    if end is None:
        end = len(list_of_numbers) - 1

    if start > end:
        # This will happen if the list is empty of the number is not found in the list.
        raise ValueError('Number not in list')

    mid = (start + end) // 2  # This is the mid value of our binary search.

    if number == list_of_numbers[mid]:
        # We have found the number in our list. Let's return the index.
        return mid

    if number < list_of_numbers[mid]:
        # Number lies in the lower half. So we call the function again changing the end value to 'mid - 1' Here we are entering the recursive mode.



        return binary_search_recursive(list_of_numbers, number, start, mid - 1)
    # number > list_of_numbers[mid]
    # Number lies in the upper half. So we call the function again changing the start value to 'mid + 1' Here we are entering the recursive mode.

    return binary_search_recursive(list_of_numbers, number, mid + 1, end)
Beautiful Bat

binäre Suche in Python

def binary_search(group, suspect):
  group.sort()
  midpoint = len(group)//2
  while(True):
    if(group[midpoint] == suspect):
      return midpoint
    if(suspect > group[midpoint]):
            group = group[midpoint]
    if(suspect < group[midpoint]):
      group = group[0: midpoint]
    midpoint = (len(group)//2)
Weary Walrus

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