Agree with above of course. Just want to point out to people coming from a C# world that for instance structs in C# are passed by value. You get a copy of an object with all of its members also copied. It ends up on the stack. class instances are passed by "a copy of a reference" if you like often short-handed to "passed by reference". In Javascript only primitives are passed by copying the pure value, objects are always a copy of a reference.
Correct. structs in several languages behave similarly (C, Go, Crystal). The cost of copying becomes larger as the struct becomes larger, which is where pointers come in. Then references were made as a safer alternative to pointers. (obviously glossing over details here)
By the way, I think you mean instances when you wrote "classes are passed by "a copy of a reference""
In the end it all comes down to knowing how pointers work. So many programmers think that if they're not coding in C or C++ then they can just not learn how pointers work since they're dealing with """references"""
Knowing what is exactly copied is incredibly important in every language.
Agree with above of course. Just want to point out to people coming from a C# world that for instance
structsin C# are passed by value. You get a copy of an object with all of its members also copied. It ends up on the stack.class instancesare passed by "a copy of a reference" if you like often short-handed to "passed by reference". In Javascript only primitives are passed by copying the pure value, objects are always a copy of a reference.Correct.
structsin several languages behave similarly (C, Go, Crystal). The cost of copying becomes larger as the struct becomes larger, which is where pointers come in. Then references were made as a safer alternative to pointers. (obviously glossing over details here)By the way, I think you mean
instanceswhen you wrote "classesare passed by "a copy of a reference""In the end it all comes down to knowing how pointers work. So many programmers think that if they're not coding in C or C++ then they can just not learn how pointers work since they're dealing with """references"""
Knowing what is exactly copied is incredibly important in every language.
Ooops... Quite right, instances of classes.