I am working on a C++ workshop and have been facing this error message at the addCustomer function. Would you please explain the reason of it and how can I fix this issue please? Thank you very much.
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I am working on a C++ workshop and have been facing this error message at the addCustomer function. Would you please explain the reason of it and how can I fix this issue please? Thank you very much.
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- struct insert_into_hash_table { // Function takes a constant Book as a parameter, inserts that book indexed by // the book's ISBN into a hash table, and returns nothing. void operator()(const Book& book) { ///// /// TO-DO (8) ||||. // Write the lines of code to insert the key (book's ISBN) and value // ("book") pair into "my_hash_table". /// END-TO-DO (8) // } std::unordered_map& my_hash_table; };3. lookup_friends_heights This function takes a friends database (a list of dictionaries, like the previous functions) and a list of friends names, and it returns a list of heights for the specified friends. If a given friend's name is not present in the friends database, we put a None in the corresponding slot. We assume that there will be at most one friend with a given name in the list. You may want to use nested for-loops for this function. Sample calls should look like this. >>> lookup_friends_heights([{"name":"todd","height":170},{"name": "sarah", "height":165},{"name":"dweezil", "height":175}], ["dweezil", "sarah"]) [175, 165] >>> lookup_friends_heights([{"name": "todd","height":170},{"name": "sarah","height":165},{"name": "dweezil", "height":175}], %3D ["sarah", "elíza", "dweezil"]) [165, None, 175]3. lookup_friends_heights This function takes a friends database (a list of dictionaries, like the previous functions) and a list of friends names, and it returns a list of heights for the specified friends. If a given friend's name is not present in the friends database, we put a None in the corresponding slot. We assume that there will be at most one friend with a given name in the list. You may want to use nested for-loops for this function. Sample calls should look like this. >>» lookup_friends_heights([{"name":"todd", "height":170},{"name":"sarah","height":165}, {"name":"dweezil","height":175}], ["dweezil", "sarah"]) [175, 165] >>> lookup_friends_heightsC[{"name":"todd","height":170},{"name":"sarah","height":165}, {"name":"dweezil","height":175}], ["sarah", "eliza", "dweezil"]) [165, None, 175] 4. class definition for Friend For the next version of the friends database (coming soon!), we want to use classes rather than dictionaries. Define a Friend class , where each Friend object…
- Python Programming Assignment: Create a dictionary that takes a basketball team's information (that includes team's name and points) as parameter, creates a teams_dict and returns it. Also, create a parameter for write_file parameter that opens current results text file in write mode and writes the dictionary information to file as per format and closes the file.C application controlled by menus to use array as a queue. Can you enqueue, dequeue, and play back data?Data structures unique_values(a_dict:dict)-> dict This function will receive a single dictionary parameter known as a_dict. a_dict will contain a single letter as a string and numbers as values. This function is supposed to search a_dict to find all values that appear only once in the a_dict. The function will create another dictionary named to_ret. For all values that appear once in a_dict the function will add the value as a key in to_ret and set the value of the key to the key of the value in a_dict (swap the key-value pairs, since a_dict contains letters to numbers, to_ret will contain Numbers to Letters). Finally, the function should return to_ret. Example: a_dict: {'X': 2, 'Y': 5, 'N': 2, 'L': 2, 'W': 1, 'G': 0, 'R': 1} Expected: {5: 'Y', 0: 'G'} a_dict: {'Z': 3, 'P': 3, 'E': 2, 'G': 0, 'T': 5, 'L': 1, 'Q': 0} to_ret: {2: 'E', 5: 'T', 1: 'L'} a_dict: {'E': 3, 'X': 3} to_ret: {} a_dict: {'G': 3, 'D': 3, 'C': 4, 'Q': 1, 'H': 1, 'M': 2, 'Z': 1, 'W': 3} to_ret: {4: 'C', 2: 'M'}…
- randdf.py -> using "sys.argv" Create a program called randdf.py that has a function that takes two integer arguments and prints a Pandas dataframe. The two arguments will correspond to the number of rows and number of columns, respectively. The dataframe should be filled with random integers from 0 to 100. Set your random seed to 56.Data structures concatenate_dict(dict_list:list)->dict This function will be given a single parameter known as the Dictionary List. Your job is to combine all the dictionaries found in the dictionary list into a single dictionary and return it. There are two rules for adding values to the dictionary: 1. You must add key-value pairs to the dictionary in the same order they are found in the Dictionary List. 2. If the key already exists, it cannot be overwritten. In other words, if two or more dictionaries have the same key, the key to be added cannot be overwritten by the subsequent dictionaries. Example: Dictionary List: [{'Z': 6, 'k': 10, 'w': 3, 'I': 8, 'Y': 5}, {'Y': 1, 'Z': 4}, {'X': 2, 'L': 5}] Expected: {'Z': 6, 'k': 10, 'w': 3, 'I': 8, 'Y': 5, 'X': 2, 'L': 5} Dictionary List: [{'z': 0}, {'z': 7}] Expected: {'z': 0} Dictionary List: [{'b': 7}, {'b': 10, 'A': 8, 'Z': 2, 'V': 1}] Expected: {'b': 7, 'A': 8, 'Z': 2, 'V': 1}Linear list directory structures have the disadvantage that you must search an entire linked list to ensure that a new file doesn't match a name already in the directory. Question 2 options: True False
- You cannot create a shared pointer that does not reference an object. O True FalsenumList: head: tail: data: 73 next: data: 37 next: data: 85 next: null After List Prepend(numList, node 58), determine the following values. Enter null if the pointer is null. numList's head pointer points to node Ex: 5 or null numList's tail pointer points to node node 58's next pointer points to node node 85's next pointer points to nodechar buffer [BUFSIZE]; int fd = open("fooey", O_WRONLY|O_CREAT|O_TRUNC,0777); strcpy(buffer, "First data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 90, SEEK_SET); strcpy (buffer, "Second data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 100, SEEK_END); strpcy (buffer, "Third data"); write(fd, buffer, strlen(buffer)); close(fd); a. What is the size of the file at the end of this section of code? b. Describe the contents of the file say exactly what byte offsets contain actual data, and what offsets constitute "holes". c. Why might holey files be useful? d. Suppose, after the above sequence of writes, the same program opens the file for reading and then does: