Just what is the function of the delete operator?
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Just what is the function of the delete operator?
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- JS Write a function named number_of_pairs whose parameter is an object/dictionary with strings as keys and integers as values. Your function should returns the number of key-value pairs in the parameter.Define the function lake_to_tli3_dict(readings) that takes a list of (lake_name, chla, tn, tp) tuples and returns a dict mapping lake names to trophic level index values. That is, the keys are lake names and the values will be TLI3 values. Notes: You will need to have import math as your first line of code. You must include and use/call the trophic_level_index function that you wrote in Question 1. trophic_level_index must still work as specified in Question 1. Lakes should be added to the dictionary in the same order as they appear in the readings list. If a lake appears in the readings list more than once, then the TLI for the last occurrence in the readings list should be the one that appears in the result. (This should happen naturally, since the lake name can only occur in the dictionary once.) For example: Test Result names_cnp_1 = [('Lake Brunner', 0.8, 218.0, 6.0), ('Lake Carrot', 5.1, 505.0, 18.5) ] tli3_dict = lake_to_tli3_dict(names_cnp_1 ) print(tli3_dict)…This code is a part of a C dictionary. Please write the code for the below requirements. dict_get Next, you will implement: char* dict_get (const dict_t* dict, const char* key); This function goes through the list given by dict. If you use the above structure, this means starting at el = dict->head and checking each time whether the key at el is key; if it is not, we set el = el->next, until either key is found, or we reach el == NULL. To compare key with el->key, we need to compare one by one each character in key with those in el->key. Remember that strings in C are just pointers (memory addresses) to the first character in the string, so comparing el->key == key will not do what you want. So how do you even get the length of a string s? You would start at memory location s and advance as long as the byte at s (i.e. *s) is not the end-of-string marker (\0, the NULL character). This can get a bit messy, so luckily, you are allowed to use the string comparison…
- what is list pointer variable ?13. While dictionaries are designed so that we can find a value based on a key, every so often we need to perform a reverse lookup. For example, imagine a dictionary where the keys are names and the values are phone numbers. Usually we want to find the phone number based on the name, but occasionally you might need to find a name based on the phone number. Write a function called reverse_lookup(dictionary, value) that returns all the keys in the dictionary associated with the specified value. Note: In dictionaries, the keys are guaranteed to be unique, but the values are not. So your function should return a list containing all of the matching keys (if any) Example: Given this dictionary, groups = {'Apple': 'Fruit', 'Spinach': 'Vegetable', 'Banana': 'Fruit'} reverse_lookup (groups. Vegetable') ["Spinach'] reverse_lookup (groups, Fruit') ['Apple'. 'Banana'] reverse_lookup (groups. 'Meat') []This section has been set as optional by your instructor. OBJECTIVE: Write a program in Python that prints the middle value of a dictionary's values, using test_dict from the test_data.py module. NOTE: test_dict is created & imported from the module test_data.py into main.py Example 1: test dict = {'a':1,'b':9,'c':2,'d':5} prints 5 Example 2: test_dict = {'b':9,'d':5} prints 5 Hint: You may(or may not) find the following function useful: list.sort() which sorts the elements in a list. Note: the result is automatically stored in the original list, and return value from the function is None Туре list = [1, 2,3,2,1] After calling: list = [1,1,2,2,3] list.sort(), 339336.2266020 x3zgy7 LAB 13.11.1: Middlest Value (Structured Types) АCTIVITY 0/11 File is marked as read only Current file: test_data.py 1 #This module creates the test_dict to be used in main.py 2 #Reads input values from the user & places them into test_dict 3 dict_size = int(input()) #Stores the desired size of test_dict. 4…
- Javascript Create a function named "getUser". This function needs to accept a "userID" parameter. Use Fetch with Async/Await to request the data for the requested user. The function should return JSON data.Coding language: C++. (Try to avoid linked lists if possible please). Add comments. Thanks. • Each functionality component must be implemented as a separate function, though the function does not need to be declared and defined separately • No global variables are allowed • No separate.hor.hpp are allowed • You may not use any of the hash tables, or hashing functions provided by the STL or Boost library to implement your hash table • Appropriate, informative messages must be provided for prompts and outputs You must implement a hash table using the Double Hashing collision strategy and the mid-square base 10 hashing function with an R of 2. Your collision strategy must be implemented as a separate function, though it may be implemented inside your insert/search/delete functions, and should halt an insert / search/delete functions, and should halt an insert/search/delete after table size number of collisions. Your hash function must be implemented as a separate function. Your hash table…10. Write another function called db_consistent that takes a dictionary of dictionariesin the format described in the previous question and returns Trueif and only if every one of the inner dictionaries has exactly the same keys.(This function would return False for the previous example, since RosalindFranklin's entry doesn't contain the 'author' key.)
- What is the difference between 'delete' and 'deletel' in C++? Select one: a.delete is the correct operator, but deletel operator does not exist b.delete is used to delete automatic objects whereas deletel is used to delete pointer objects c.delete is used to delete single dynamic object whereas deletel is used to delete dynamic array objects d.delete is a keyword whereas delete] is an identifierAs part of this assignment, the program that you will be writing will store current grades in a dictionary using course codes as keys and with values consisting of percent grades in lists. The main functions of this program are to print a student's gradebook, to drop the lowest grade in each course, print the student's gradebook again, drop the course with lowest average, and finally printing the student's gradebook again. This program requires a main function and a custom value-returning function. In the main function, code these basic steps in this sequence (intermediate steps may be missing): start with an empty dictionary that represents a gradebook and then use a while loop to allow the input of course codes from the keyboard. End the while loop when the user presses enter without entering data.within the while loop:for each course entered, use a list comprehension to generate five random integers in the range of 70 through 100. These random integers in a list represent the…Which of the following function chooses a random index as the pivot? A. int Median(arr, left, right) { int mid; mid = (left + right)/2 if (arr[right] arr[left]); Swap(arr, left, right); //to swap arr[left],arr[right] if (arr[mid] < arr[left); Swap(arr, mid, left);//to swap arr[left],arr[mid] if (arr[right] < arr[mid]); Swap(arr, right, mid);// to swap arrſright],arr[mid] return mid; } С. int Median(arr, left, right) { int mid; mid = (left + right)/2 if (arr[left] < arr[right]); Swap(arr, left, right); //to swap arr[left],arr[right] if (arr[left] < arr[mid]); Swap(arr, mid, left);//to swap arr[left],arr[mid] if (arr[right] < arr[mid]); Swap(arr, right, mid);// to swap arr[right),arr[mid] return mid; } D. int Median(arr, left, right) { int mid; mid = (left + right)/2 if (arr[right] < arr[left); Swap(arr, left, right); //to swap arr[left],arr[right] if (arr[left] < arr[mid]); Swap(arr, mid, left);//to swap arr[left],arr[mid] if (arr[mid] < Swap(arr, right, mid);// to swap…