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推动“一带一路”IT产业怎么走 - 资讯 - 清泛网 - 专注C/C++及内核技术
推动“一带一路”IT产业怎么走“一带一路”倡议对其沿线国家及地区而言不仅意味着基础设施建设的提速，还有科技和文化的互联互通。如何把握机会借助“一带一路”走出去，如何在IT产业更为发达的地区站稳脚跟并抓住欠...
source of historical stock data [closed]
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Let me add my 2¢, it's my job to get good and clean data for a hedge-fund, I've seen quite a lot of data feeds and historical data providers. This is mainly about US stock data.
To start with, if you have some money don't bother with download...
In Functional Programming, what is a functor?
...ader already understands the term. Looking around on the web has provided either excessively technical descriptions (see the Wikipedia article ) or incredibly vague descriptions (see the section on Functors at this ocaml-tutorial website ).
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UIDevice uniqueIdentifier deprecated - What to do now?
It has just come to light that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and unavailable in iOS 7 and above. No alternative method or property appears to be available or forthcoming.
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Is DateTime.Now the best way to measure a function's performance?
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No, it's not. Use the Stopwatch (in System.Diagnostics)
Stopwatch sw = Stopwatch.StartNew();
PerformWork();
sw.Stop();
Console.WriteLine("Time taken: {0}ms", sw.Elapsed.TotalMilliseconds);
Stopwatch automatically checks for t...
Check if a number has a decimal place/is a whole number
... for an easy way in JavaScript to check if a number has a decimal place in it (in order to determine if it is an integer). For instance,
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How do HttpOnly cookies work with AJAX requests?
JavaScript needs access to cookies if AJAX is used on a site with access restrictions based on cookies. Will HttpOnly cookies work on an AJAX site?
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How to find the 'sizeof' (a pointer pointing to an array)?
...what the pointer is pointing to. There are tricks, like ending the array with a known out-of-band value and then counting the size up until that value, but that's not using sizeof().
Another trick is the one mentioned by Zan, which is to stash the size somewhere. For example, if you're dynamica...
How to determine the encoding of text?
...ing Python? How can I detect the encoding/codepage of a text file deals with C#.
10 Answers
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How long do browsers cache HTTP 301s?
I am debugging a problem with a HTTP 301 Permanent Redirect. After a quick test, it seems that Safari clears its cache of 301s when it is restarted, but Firefox does not.
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