I was studying Reflection, I got some of it but I am not getting everything related to this concept. Why do we need Reflection? What things we couldn't achieve that we need Reflection?
In the comments and answers to this question: Virtual function compiler optimization c++ it is argued that a virtual function call in a loop cannot be devirtualized, because the virtual function might replace this by another object using placement new, e.g.:
This is a short one, yet very irritating - i know i can count the amount of a certain string occuring within another string like
I have a following table in RWhat I want is to replace the row value with the column name whenever the row is equal to 1. The output would be this one:
I have a String that contains 2 or 3 company names each enclosed in parenthesis. Each company name can also contains words in parenthesis. I need to separate them using regular expressions but didn't find how.
I am getting strange warning on almost all the websites since morning. Check the attached file : Deceptive site warning
I supposed, the result should be 1, 2, 3.What's wrong here?There's nothing wrong (that is, ordinary assignment in P6 is designed to do as it has done) but at a guess you were hoping that making the structure on the two sides the same would result in $a getting 1,...
I have a data frame with few thousands rows and selected 2 columns such as:In each column values at some point reset to 1, and then go on acummulating up to some value before resetting again. Reset point in each column is independent from the other. What I need is...
I need to find out the first outermost(not nested) brackets indexes.For exampleI can find it by lots of conditions, current code:
I'm converting an integer value to a ternary number (which is a String). I suspect there should be a better way to achieve this with less computational effort.