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C++ Development

C++ template member initialization: move-construction with rvalue but reference with lvalue

The constructor of my class initializes reference members. How can I make it safe to pass temporary objects for the initialization of those reference members? I have got a class of Objects and classes of operations performed on those objects. The operations are all derived from an abstract base class that provides the common interface. […]

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Development

D3 v5 unable to get bar chart section key name

Here is my code I’m trying to get the selection name and cannot find the substitute for d3.select(this.parentNode).datum().key as used in this example .on(“mouseover”, (d, i, nodes) => { const subgroupName = d3.select(nodes).datum().key; //d3.select(this.parentNode).datum().key; console.log(subgroupName); }) I tried using the 3rd node param in the mouse over function but not able to get the key […]

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calculate the days between two dates

I did a program that calculates the days different, between two dates, but I am not sure how can I add a statement that makes sure the program wont include the end date. then will only include the end date, if I write the word include after writing the two dates! for instance the program […]

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Development

Function or package to compare model fits side by side?

Is there a more elegant way of doing this? m1 <- lm(price ~ carat, data = diamonds) m2 <- lm(price ~ carat + cut, data = diamonds) m3 <- lm(price ~ carat + cut + depth, data = diamonds) m1r2 <- summary(m1)$r.squared m2r2 <- summary(m2)$r.squared m3r2 <- summary(m3)$r.squared data.frame( model = c(“m1”, “m2”, “m3”), RSqd […]

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Development

Is it possible to insert a new row using Query Language?

I’m using this code: select B, C, SUM(I) where K=”yes” or K=”maybe” group by B, C order by B asc to take data from one table and sort it into another, where I’m using functions to calculate all sorts of different, annoyingly complicated things. Problem is, whenever new data is added, because I wanted it […]

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Development

Mockito Matcher for a TypeReference

I am trying to write a Java unit test using Mockito but am having trouble to get a matcher to work. I have some json, see sample below { “actions”: [“ac1”, “ac2”, “ac3”] } I have a method that gets the list, see sample Java code below public class customService { private final ObjectMapper mapper […]

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[ Fashion & Accessories ] Open Question : Looking for ear piering?

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[ Singles & Dating ] Open Question : After how long should I date?

I dated this guy for a month. I really fell for him. I don’t know if he had the same feeling. I ended up feeling like a complete idiot after we broke up. So how long should I take to start dating again. (Ps I think a month)

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[ Polls & Surveys ] Open Question : Why do I have to listen to Madonna when I go grocery shopping?

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[ Mathematics ] Open Question : How do I convert 15 pounds to kg please show step by step without calcular. We arent allowed to use it. Thank you in advance?