library-design | 易学教程

An Object that returns an instance of itself

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Background: My latest project cannot use a large library, which saddens me. There are a few things that I would like to have from any library such as the missing functions addClass , hasClass , removeClass , compatible addEventListener , etc. So I created a little object which I'd like some opinions on some other time, but I'm having a little bit of trouble setting it up how I'd like. For convenience of use, I want an object to return a new instance of itself on creation. Given: $ = function() { this.name = "levi"; return this; }; console.log($()); We get DOMWindow instead of $ because of the

Why does std::fstream set the EOF bit the way it does?

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问题 I recently ran into a problem caused by using fstream::eof(). I read the following line from here: The function eof() returns true if the end of the associated input file has been reached, false otherwise. and (mistakenly) assumed this meant that if I used fstream::read() and read past the end of the file, the function eof() would tell me. So I did something like this (very generalized): for(int i = 0; i < max && !file.eof(); i++) { file.read(mything, sizeof(mything)); } The problem came

An Object that returns an instance of itself

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问题 Background: My latest project cannot use a large library, which saddens me. There are a few things that I would like to have from any library such as the missing functions addClass , hasClass , removeClass , compatible addEventListener , etc. So I created a little object which I'd like some opinions on some other time, but I'm having a little bit of trouble setting it up how I'd like. For convenience of use, I want an object to return a new instance of itself on creation. Given: $ = function(