How to use imitating function in C++
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First, problems
Consider a simple example: suppose you have a vector, and your task is to count the number of string whose length is less than 5. If you use the count_if function, your code may look like this:
/ / count the number of string whose length is less than 5 bool LengthIsLessThanFive (const string& str) {return str.length ()
