history

In 32bit, we had 8 "general purpose" registers. With 64bit, the amount doubles, but it seems independent of the 64bit change itself. Now, if registers are so fast (no memory access), why aren't there more of them naturally? Shouldn't CPU builders work as many registers as possible into the CPU? What is the logical restriction to why we only have the amount we have? There's many reasons you don't just have a huge number of registers: They're highly linked to most pipeline stages. For starters, you need to track their lifetime, and forward results back to previous stages. The complexity gets

Alan Kay was quoted several years ago to the effect that there had been only three new things in software in the preceding 20 years (effectively the lifespan of PCs). One of them was Spreadsheets. Does anyone remember the other two? Who is Alan Kay? (a few may ask.) His work at Xerox Parc arguably did more to shape our current software paradigm than any other influence. Alan Kay I will try to remember what I said, but none of the answers so far are correct (every one of them was done in the 60s and 70s before the commercialization of PCs in the 80s). However, we could start all over and try to

I use ejabberd 16.06 + mysql 5.5.50, message history is not saved. My ejabberd.yml: ## MySQL server: odbc_type: mysql odbc_server: "freldo" odbc_port: 3306 odbc_database: "ejabberd" odbc_username: "ejabberd" odbc_password: "ejabberd" modules: ... mod_mam: db_type: odbc default: always for the formation of the database structure, I used: mysql.sql I get an error: @ejabberd_sql:check_error:1039 SQL query 'SELECT timestamp, xml, peer, kind, nick FROM (SELECT timestamp, xml, peer, kind, nick FROM archive WHERE username='test' and bare_peer='misha@freldo' ORDER BY timestamp DESC limit 21) AS t

friends I want to access email history from my iphone & also want notification when new mail receive. Provide me source code snippet if possible. Thanks, In short: It is not possible with any of the documented APIs 来源： https://stackoverflow.com/questions/7039370/how-can-i-get-email-history-from-iphone-device

My ~/.zsh_history shows: : 1449561637:0;echo "foobar" I'm guessing it goes unix timestamp : exit code ; command but what about the space before the timestamp and first colon? Is there an official spec? As already noted in the comments, the format of the history file depends on the shell and sometimes even on specific settings of the shell. In your case you are using zsh with the EXTENDED_HISTORY option enabled (either by explicitly setting it or by using csh -emulation). According to the ZSH manual the format of history entries with EXTENDED_HISTORY is as follows: : <beginning time>:<elapsed

window.history 对象包含浏览器的历史。 浏览者通常可以使用浏览器的前进与后退按钮访问曾经浏览过的页面。JavaScript的history对象记录了用户曾经浏览过的页面，并可以实现浏览器前进与后退相似的导航功能。 可以通过back函数后退一个页面，forward函数前进一个页面，或者使用go函数任意后退或前进页面，还可以通过length属性查看history对象中存储的页面数。 注意： 由于安全的原因，不能显示history对象中的历史页面URL。 如果一个窗体没有被用户浏览过任何页面(也就是一个新建的窗体)，其history对象缓存的URL为空，无法使用相关函数导航。 history对象的方法和属性 方法/属性 说明 go() 前进或后退指定的页面数 back() 后退一页，与浏览器的后退按钮功能相同 forward() 前进一页，与浏览器的前进按钮功能相同 length history对象中缓存了多少个URL 对于 go() 方法的说明。 语法： history.go(x) 其中，x （整数）为前进或后退的页面数。 x > 0：前进 x 个页面； x < 0：后退 -x 个页面； x = 0：刷新当前页面。 例如，前进一个页面： history.go(1); // 与 history.forward() 功能相同 后退一个页面： history.go(-1); /

How can I store history of ManyToManyField using django-simple-history. I used HistoricalRecords with attribute m2m_filds but it is throwing error: unexpected keyword argument 'm2m_fields' I'm macro1 on GitHub, and I guess de facto maintainer of django-simple-history. From your question it seems that you're just asking about general ManyToManyField support compared with other fields. The short answer is that we do not currently support it. ManyToManyFields actually create an in-between model that represents the relationship between the two models you're working with. If you want tracking on

When invoking git mv file1 file2 does it record the move internally (for history tracking in the log) or is it completely the same as invoking mv file1 file2 , git rm file1 and git add file2 ? Greg Hewgill git mv is exactly the same as the three operations you listed. Although Git does not explicitly record the move in the repository, the move is detected later whenever you ask for history. For example, adding the --follow switch to git log automatically finds files that have been renamed. 来源： https://stackoverflow.com/questions/3888944/git-mv-records-move