bstamour

17 ms·

121.
by bstamour 12y ago
C++ is indeed a high level language, comparable to, say, C#. Let's enumerate some features that we take for granted in most modern high level languages 1. Type deduction (C++ has it) 2. Lambda functions (C++ has it) 3. Support for OO
122.
by bstamour 12y ago
And this is why I hate the term "mathematical induction". It's actually a form of deductive reasoning, not inductive reasoning.
123.
by bstamour 13y ago
You can, but not with vector. Use valarray if you need to perform those kinds of computations.
124.
by bstamour 13y ago
Make sure to check out the android app too. It's cool to be able to read your self-hosted RSS feeds from your phone with zero hassle.
125.
by bstamour 13y ago
Is the phrase "locator value" defined by the C standard? I've never heard of it before. I always knew the 'l' in "lvalue" as meaning "this expression can appear on the left-hand side of an assignment
126.
by bstamour 13y ago
Which goes right back to the original piece of advice: if you have access to the main apache config, put your changes there for performance reasons. Otherwise use .htaccess.
127.
by bstamour 13y ago
It was mentioned in a section about frameworks: http://jstherightway.org/#frameworks
128.
by bstamour 13y ago
I omitted the return type (which is allowed for lambdas in C++11, and now arbitrary functions (with some conditions) in C++14) because it was a 1-liner. The bool return type can be deduced by the compiler automatically (or else it would fai
129.
by bstamour 13y ago
More than that, actually. Because of argument dependent lookup, this will work for any container that has begin and end functions in the same namespace.
130.
by bstamour 13y ago
With C++14 this becomes sort(begin(vs), end(vs), [](auto const& l, auto const& r) { return l.size() < r.size(); }); Even simpler.
131.
by bstamour 13y ago
After years of long build times, we C++ programmers basically have to become mental compilers in order to keep our productivity high.
132.
by bstamour 13y ago
It allows you write code that works for multiple types. For example, consider the following function in C++: template <typename T> T min(T a, T b) { if (a < b) return a; else re
133.
by bstamour 13y ago
Typically with monadic code, a function with an underscore at the end of its name discards it's effect. For example, the function mapM maps a function over a list, i.e. mapM :: Monad m => (a -> m b) -> [a] -> m [b]
134.
by bstamour 13y ago
unique_ptr, the default smart pointer in C++ is no slower than direct pointer access. If you require data sharing, then shared_ptr offers you that feature at the cost of reference counting.
135.
by bstamour 13y ago
It closes for me fine. Just tested it to be sure.
136.
by bstamour 13y ago
I tend to write a lot of systems-level code, and the reason I choose C++ over C is because C++ gives me more power to build useful abstractions, while still letting me drop down to the bit-twiddling level if I need to. I do enjoy high level
137.
by bstamour 13y ago
Yes. C++ is one of the few (maybe the only) languages that gives you enough high-level features to be productive, but doesn't do so at the expensive of ruthless runtime efficiency. If you need to squeeze every ounce of juice out of a m
138.
by bstamour 13y ago
Correct. Even if you simply changed all of your dynamic arrays to std::vectors, the code you write is now simpler, easier to reason about, and pretty much memory leak-free.
139.
by bstamour 13y ago
It's not an optimization: it's move semantics. And it's default behaviour for any standards-conforming compiler. Moves can be optimized away still, but by default, returning a std::vector from a function is a constant-time op
140.
by bstamour 13y ago
I wouldn't say it's gone into scripting language territory yet, but C++ is becoming a much simpler language for everyday programming. It's still a large complicated beast with sharp corners, but that only really occurs when y
141.
by bstamour 13y ago
Passing by value in C++ can offer speed increases when the function will be copying the object anyways, due to move semantics, constructor eliding, etc.
142.
by bstamour 13y ago
Technically C doesn't have a standard ABI either. Compilers just tend to use similar symbol names.