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2 years ago

Which of the following meanings can a $ character assume within a regular expression? (can have more than 1 answer)

Computers and Technology

1 answer:

denis-greek [22]2 years ago

7 0

Answer:

a. A literal dollar sign .

b. Shell variable syntax.

c. End-of-line anchor for pattern matching.

Explanation:

There are three answers to this question among the given options.

When a regular expression is quoted single, the $ character can act in one of two ways. end of line anchor for pattern matching.Elsewhere it acts as a literal dollar sign.

When a double quoted regular expression is there, the $ character is treated as a shell variable syntax.

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What is the argument in this function =AVERAGE(F3:F26)

monitta

The argument for the function would be answer "D".

5 0

2 years ago

Describe a strategy for avoiding nested conditionals. Give your own example of a nested conditional that can be modified to beco

harina [27]

Answer:

One of the strategies to avoid nested conditional is to use logical expressions such as the use of AND & operator.

One strategy is to use an interface class with a method. That method can be created to be used for a common functionality or purpose. This is also called strategy design pattern. You can move the chunk of conditional statement to that method. Then each class can implement that interface class and use that shared method according to their own required task by creating objects of sub classes and call that common method for any such object. This is called polymorphism.

Explanation:

Nested conditionals refers to the use of if or else if statement inside another if or else if statement or you can simply say a condition inside another condition. For example:

if( condition1) {

//executes when condition1 evaluates to true

if(condition2) {

//executes when condition1 and condition2 evaluate to true

} else if(condition3) {

//when condition1 is true and condition3 is true

} else {

//condition1 is true but neither condition2 nor conditions3 are true

} }

The deeply nested conditionals make the program difficult to understand or read if the nested conditionals are not indented properly. Also the debugging gets difficult when the program has a lot of nested conditionals.

So in order to avoid nested conditionals some strategies are used such as using a switch statement.

Here i will give an example of one of the strategies i have mentioned in the answer.

Using Logical Expressions:

A strategy to avoid nested conditionals is to use logical expressions with logical operators such as AND operator. The above described example of nested conditionals can be written as:

if(condition1 && condition2){ //this executes only when both condition1 and condition2 are true

} else if(condition1 && condition3) {

this executes only when both condition1 and condition3 are true

} else if(condition1 ){

//condition1 is true but neither condtion2 nor condtion3 are true }

This can further be modified to one conditional as:

if(!condition3){

// when condition1 and condition2 are true

}

else

// condition3 is true

Now lets take a simple example of deciding to go to school or not based on some conditions.

if (temperature< 40){

if (busArrived=="yes") {

if (!sick) {

if (homework=="done") {

printf("Go to school.");

}

This uses nested conditionals. This can be changed to a single conditional using AND logical operator.

if ((temperature <40) && (busArrived=="yes") &&

(!sick) && (homework=="done"))

{ cout<<"Go to school."; }

6 0

2 years ago

Write a function called add_tuples that takes three tuples, each with two values, and returns a single tuple with two values con

Leni [432]

In Python, tuples are indeed a data structure that also stores an ordered sequence of unchanging values, and following are the Python program to the given question:

Program Explanation:

Defining a method "add_tuples" that takes three variables "firstTuple, secondTuple, thirdTuple" into the parameter.
After accepting the parameter value a return keyword is used that adds a <em><u>single tuple with two values</u></em> and returns its value into the form of (x,y).
Outside the method, two print method is declared that calls the above method by passing value into its parameters.

Program:

def add_tuples(firstTuple, secondTuple, thirdTuple):#defining a method add_tuples that takes three variable in parameters

return firstTuple[0]+secondTuple[0]+thirdTuple[0],firstTuple[1]+secondTuple[1]+thirdTuple[1] #using return keyword to add value

print(add_tuples((1,4), (8,3), (14,0)))#defining print method that calls add_tuples method takes value in parameters

print(add_tuples((3,2), (11,1), (-2,6)))#defining print method that calls add_tuples method takes value in parameters

Output:

Please find the attached file.

Learn more:

brainly.com/question/17079721

4 0

2 years ago

You want to implement a mechanism that automates ip configuration, including ip address, subnet mask, default gateway, and dns i

telo118 [61]

You're probably looking for DHCP (Dynamic Host Configuration Protocol).

5 0

2 years ago

Which command suppresses the visibility of a particular Row or column in a worksheet?

leonid [27]

Answer:

Ctrl+Space is the keyboard shortcut to select an entire column.

Explanation:

When you press the Shift+Space shortcut the first time it will select the entire row within the Table. Press Shift+Space a second time and it will select the entire row in the worksheet.

The same works for columns. Ctrl+Space will select the column of data in the Table. Pressing the keyboard shortcut a second time will include the column header of the Table in the selection. Pressing Ctrl+Space a third time will select the entire column in the worksheet.

You can select multiple rows or columns by holding Shift and pressing the Arrow Keys multiple times.

4 0

2 years ago