In this post, we will see how to resolve How can I add a line of code to reverse the output of my program? Question: I’m having trouble with my homework assignment. The assignment was to create a “Can I ...

Question: I would like to have the echo command executed when cat /etc/passwd | grep "sysa" is not true. What am I doing wrong? Best Answer: try grep returns true if it finds the search target, and false if it ...

Question: I’ve always thought of the if not x is None version to be more clear, but Google’s style guide and PEP-8 both use if x is not None. Are there any minor performance differences (I’m assuming not), and is ...

Question: Can I convert a string representing a boolean value (e.g., ‘true’, ‘false’) into a intrinsic type in JavaScript? I have a hidden form in HTML that is updated based upon a user’s selection within a list. This form contains ...

Question: Excuse my ignorance about this… I’m taking a data analysis course and I stumbled upon this query in an exercise: ActivityDate is a field that contains date type data and DATE_REGEX is a regular expression variable for a date ...

Question: I have to draw the simplified logic circuit of this given [(A’B’)’ + (A’+ B’)’]’ and also get the simplified boolean expression Answer: From DeMorgan Theory assume we can conclude that as both (XY) and (X+Y) has to be ...

Question: I have this dataframe: I need to create three columns (_1, _2, _3), each of which counts the occurrence of the values 1, 2 and 3 respectively in each row. So the output would look like this: For example: ...

Question: Given two (4-1) multiplexers How can I get the truth table of f(x1,x2,x3,x4) function?? Answer: A 4-1 multiplexer has the following general truth-table: The two control inputs A0 and A1 select which of the four inputs is switched through ...