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How to cope with refreshing page with JS History API pushState

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问题 A small website I was creating (more like fiddling) uses AJAX to load each page. Previously I was changing the hash of the url, this worked great but was ugly, and the user could refresh the page, and it would stay on the same page. Now I have switched to using pushState in the JS History API, which looks much better, and the back and forward work, but refreshing does not. For example: Going to: http://example.com/page2 goes to a 404 as there is no real page called page 2. But if I click on

Is one's complement a real-world issue, or just a historical one?

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Another question asked about determining odd/evenness in C, and the idiomatic (x & 1) approach was correctly flagged as broken for one's complement-based systems, which the C standard allows for. Do systems really exist in the 'real world' outside of computer museums? I've been coding since the 1970's and I'm pretty sure I've never met such a beast. Is anyone actually developing or testing code for such a system? And, if not, should we worry about such things or should we put them into Room 101 along with paper tape and punch cards...? Adam Haile This all comes down to knowing your roots. Yes,

Is the deferred/promise concept in JavaScript a new one or is it a traditional part of functional programming?

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问题 I really like the idea of jQuery's deferred/promise pattern or paradigm but sometimes I have trouble wrapping my aging brain around the finer points or specific implementation details. In fact recently I've found that the deferred/promise pattern/paradigm seems to predate jQuery and is also in at least these other JavaScript libraries/frameworks: Deferred github Q homepage task.js homepage when.js github wire.js github, presentation YUI gallery-deferred module I've probably missed some,

Completely remove (old) git commits from history

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问题 I'm starting a project using git where I'll be committing very large files, but only a few times a week. I've tried to use git as-is and it seems to store the entire file in each commit where it is changed. This will not work for this project, the repository would grow out of control. So, I want to reduce the size of the repository. My first thought was to "simply" remove all commits older than say two weeks, or only keep e.g. five commits in the history (this is probably better :)) I've

The History Behind the Definition of a 'String'

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问题 I have never thought about until recently, but I'm not sure why we call strings strings . I am a .NET programmer, but I believe the concept of strings exist in virtually every programming language. Outside of programming, I don't believe I've heard the word string used to describe words or letters. A quick Google of, 'Define: string' yields a bunch of definitions that have nothing to do with the concept of letters, words, or anything of the nature associated to programming. My guess of it, is

jQuery UI Tabs back button history

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问题 Has anyone been able to get jQuery UI Tabs 3(Latest version) working with the back button? I mean if the user hits the back button they should go to the previously visited tab on the page, not a different page. The history plug in sounds like it can work, but i cant seem to make it work with ajax loaded tabs. If anyone has managed to make this work, it would be deeply appreciated, thanks! 回答1: I just ran into this as well. Its really easy with the jquery address plugin here http://www.asual

Git - how do I view the change history of a method/function?

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问题 So I found the question about how to view the change history of a file, but the change history of this particular file is huge and I'm really only interested in the changes of a particular method. So would it be possible to see the change history for just that particular method? I know this would require git to analyze the code and that the analysis would be different for different languages, but method/function declarations look very similar in most languages, so I thought maybe someone has

Why are leading zeroes used to represent octal numbers?

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问题 I've always wondered why leading zeroes ( 0 ) are used to represent octal numbers, instead of — for example — 0o . The use of 0o would be just as helpful, but would not cause as many problems as leading 0 es (e.g. parseInt('08'); in JavaScript). What are the reason(s) behind this design choice? 回答1: All modern languages import this convention from C, which imported it from B, which imported it from BCPL. Except BCPL used #1234 for octal and #x1234 for hexadecimal. B has departed from this

Why SQL Server DATETIME type saves time in ticks of 1/300 of a sec?

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问题 SQLServer datetime format is stored as 8 bytes where the first four bytes are number of days since Jan 1, 1900 and the other four bytes are number of ticks since midnight. And the tick is 1/300 of the second. I'm wondering why is that? Where is that 1/300 came from? There must be some historic reason for that. 回答1: Yes, there is a historical reason: UNIX ! For details, read this excelent article by Joe Celko. Here is the detail you're looking for: Temporal data in T-SQL used to be a prisoner

Why does (i|o)fstream take a const char* parameter for a file name?

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问题 Why does the constructor and open method of the std::(i|o)fstream classes take the name of a file as a parameter in the form of a const char* instead of an std::string ? It seems like the creators of the STL would want to use what they had written instead of using the type they wrote a class to replace. 回答1: Class std::string implements the concept of "run-time-sized resizable string". This is when this class should be used - when you need a string whose size is only known at run-time and