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3 years ago

Algebraic concepts that include certain words and phrases and

Computers and Technology

1 answer:

Veseljchak [2.6K]3 years ago

6 0

Answer:

Boolean Operators

Explanation:

When performing a boolean search, boolean operators allow users to combine keywords with operators (or modifiers) such as AND, NOT and OR to further produce more relevant results.

The boolean operators AND and OR are used to include certain words and phrases during the search while the boolean operator NOT is used to exclude certain words and phrases.

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Which of the following would determine how many elements are in values?

DiKsa [7]

I guess depends on the language but for both java and C++ answer 3 is correct.

3 0

3 years ago

A) How could you modify Shelve with a technique discussed in class so that you can create Shelve instances that contain // Tools

Kay [80]

Answer:

See explanation

Explanation:

A “shelf” is a dictionary-like object. A shelf is an arbitrary Python objects, that is; anything that the pickle module can handle. This includes recursive data types and objects containing lots of shared sub-objects. It must be noted that the keys are ordinary strings.

(A). modification to Shelve can be done by following this instructions;

(1). Do not redefine built-in functions,(2). grab shelved item, mutate item, write mutated item back to shelf.

The number (2) instructions is during iteration over shelved items.

(B). CREATING FUNCTIONS THAT TAKES IN TWO SHELVES;

import shelve

d = shelve.open(filename) # open -- file may get suffix added by low-level

# library

d[key] = data # store data at key (overwrites old data if

# using an existing key)

data = d[key] # retrieve a COPY of data at key (raise KeyError if no

# such key)

del d[key] # delete data stored at key (raises KeyError

# if no such key)

flag = key in d # true if the key exists

klist = list(d.keys()) # a list of all existing keys (slow!)

# or, d=shelve.open(filename,writeback=True) would let you just code

# d['xx'].append(5) and have it work as expected, BUT it would also

# consume more memory and make the d.close() operation slower.

d.close() # close it

3 0

4 years ago

One lap around a standard high-school running track is exactly 0.25 miles. Write a program that takes a number of miles as input

salantis [7]

Answer:

import java.util.Scanner;

public class Miles {

public static void main(String[] args) {

//initialization

double Number_Miles;

//print the message

System.out.print("Enter the number of miles: ");

Scanner scn1 = new Scanner(System.in);

Number_Miles = scn1.nextDouble(); //read the input from user

//calculate the laps

double yourValue = Number_Miles/0.25;

//display the output on the screen

System.out.printf("%.2f", yourValue);

}

Explanation:

First import the library Scanner than create the class and define the main function. In the main function, declare the variables.

print the message on the screen and then store the value enter by the user into the variable.

Scanner is a class that is used for reading the output. So, we make the object of the class Scanner and then object call the function nextDouble() which reads the input and store in the variable.

After that, calculate the number of laps by dividing the number of miles with the given one lap running track value (0.25 miles).

$Number\,of\,laps = \frac{Number\,of\,miles}{0.25}$