A predicate is a C++ function returning a boolean or an object having a bool operator() member. A unary predicate takes one argument, a binary takes two, and so on. Examples of questions predicates can answer for a particular algorithm are: Is this element what we are looking for? Is the first of two arguments … Read more
I’ve found that the best overall strategy is to somewhat reproduce the file structure so that given any translation, I can immediately find where it was called from. This gives me some kind of context for making the translation. The majority of application translations are found in views, so my biggest top level namespace is … Read more
The ‘arrow’ operator is syntactic sugar. bar->member is the same as (*bar).member. One reason for the difference is maintainability. With the arrow operator distinct from the dot operator, it becomes much easier to keep track of which variables are pointers and which are not. It might be possible to always use . and have the … Read more
Different question but same answer: My usual layout for a django site is: projects/ templates/ common/ local/ Where: projects contains your main project and any others common contains things you may share across sites, or are at least not project-specific, like if you need to download django-profile and django-registration rather than having it directly in … Read more
No, you cannot define a function within a struct in C. You can have a function pointer in a struct though but having a function pointer is very different from a member function in C++, namely there is no implicit this pointer to the containing struct instance. Contrived example (online demo http://ideone.com/kyHlQ): #include <stdio.h> #include … Read more
The common way is to write constructors like methods and simply omit the return type. If you want to be extra clear, you can add <<constructor>> in front.
Everyone who wants to be a PHP programmer, always takes only the first word and completely ignores the second. While “programming” is WAY more important than “PHP”, to be a PHP professional, one should be a programmer in the first place. So, I’d vote for the last one – reading books. Not on PHP, but … Read more
The closest you can get is the fairly common idiom: typedef struct { // base members } Base; typedef struct { Base base; // derived members } Derived; As Derived starts with a copy of Base, you can do this: Base *b = (Base *)d; Where d is an instance of Derived. So they are … Read more
The immediate answer to your question as to fetching access to the last element in a vector can be accomplished using the back() member. Such as: int var = vec.back().c; Note: If there is a possibility your vector is empty, such a call to back() causes undefined behavior. In such cases you can check your … Read more
zlib magic headers 78 01 – No Compression/low 78 9C – Default Compression 78 DA – Best Compression