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Ruby custom error classes: inheritance of the message attribute
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Given what the ruby core documentation of Exception, from which all other errors inherit, states about #message
Returns the result of invoking exception.to_s. Normally this returns
the exception’s message or name. By supplying a to_str method,
exceptions are agreeing to be used ...
Getting started with Haskell
...'ve done this by reading tutorials and watching screencasts, but nothing really seems to stick.
Now, in learning various imperative/OO languages (like C, Java, PHP), exercises have been a good way for me to go. But since I don't really know what Haskell is capable of and because there are many new c...
What exactly does the .join() method do?
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join takes an iterable thing as an argument. Usually it's a list. The problem in your case is that a string is itself iterable, giving out each character in turn. Your code breaks down to this:
"wlfgALGbXOahekxSs".join("595")
which acts the same as this:
"wlfgALGbXOah...
#import using angle brackets < > and quote marks “ ”
I'm wondering what decides whether you're allowed to use <Header.h> or "Header.h" when you're importing files in Objective-C. So far my observation has been that you use the quote marks "" for files in your project that you've got the implementation source to, and angle brackets <>...
index.php not loading by default
I have just installed CentOS, Apache and PHP. When I visit my site http://example.com/myapp/ , it says "forbidden". By default it's not loading the index.php file.
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了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术
...即使其他程序在访问同一文件也如此！
unsigned long remove_all(const path& p)：此 API 尝试删除路径 p 所引用的文件或目录。与 remove 不同，此函数并不会特殊考虑不为空的目录。此函数是 UNIX rm –rf 命令的 Boost 对等项。
实用工具...
What is href=“#” and why is it used?
...ain use of anchor tags - <a></a> - is as hyperlinks. That basically means that they take you somewhere. Hyperlinks require the href property, because it specifies a location.
Hash:
A hash - # within a hyperlink specifies an html element id to which the window should be scrolled.
hre...
What is the difference between the Facade and Adapter Pattern?
...uld think of your universal remote control that you've set up to work with all your different stereo systems - you press "on" and it turns on your cable box, your receiver, and your TV. Maybe it's a really fancy home theater and it dims the lights and draws the shades too. That's a Facade - one bu...
How do I dynamically assign properties to an object in TypeScript?
If I wanted to programatically assign a property to an object in Javascript, I would do it like this:
23 Answers
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Best practices/performance: mixing StringBuilder.append with String.concat
...t can fit both s1 and s2. Copies s1 and s2 contents to this new array. Actually requires less work then + operator.
StringBuilder.append()
Maintains an internal char[] array that grows when needed. No extra char[] is created if the internal one is sufficiently big.
stringBuilder.append(s1.concat(...