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C++应用程序添加VBScript和JavaScript支持 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...cript method. For this reason, the first wrapper class that I want to identify is the CScriptObject. This wrapper is very simple to use and it provides most of the functionality that you will want to use in your application. It has a function to load script (text data) from a file or resource, get a...
Calculate distance between two latitude-longitude points? (Haversine formula)
...g. I added the call to convert the deltas to radians and it works properly now. I submitted an edit and am waiting for it to be peer reviewed.
– Bryan Bedard
Dec 4 '11 at 4:53
...
Divide a number by 3 without using *, /, +, -, % operators
...gt;> 2, sum);
num = add(num >> 2, num & 3);
}
if (num == 3)
sum = add(sum, 1);
return sum;
}
As Jim commented this works, because:
n = 4 * a + b
n / 3 = a + (a + b) / 3
So sum += a, n = a + b, and iterate
When a == 0 (n < 4), sum += floor(n / 3); i....
How to pass values between Fragments
...e that the host activity has implemented the callback interface
// If not, it throws an exception
try
{
mCallback = (OnImageClickListener) context;
}
catch (ClassCastException e)
{
throw new ClassCastException(context.toString...
Retrieving the last record in each group - MySQL
...
MySQL 8.0 now supports windowing functions, like almost all popular SQL implementations. With this standard syntax, we can write greatest-n-per-group queries:
WITH ranked_messages AS (
SELECT m.*, ROW_NUMBER() OVER (PARTITION BY nam...
How to make PDF file downloadable in HTML link?
...
This code is likely dangerous in another way. If you pass HTTP links to fopen, I think it'll go retrieve the file from another server. Could be used by an attacker to attempt to scan your internal network for exposed PDF files.
– Rory McCune
...
What are POD types in C++?
...
There's a difference. Intrinsic types are the "builtin" language primitives. POD types are these, plus aggregations of these (and other PODs).
– Adam Wright
Sep 28 '08 at 18:44
...
Is there a performance gain in using single quotes vs double quotes in ruby?
Do you know if using double quotes instead of single quotes in ruby decreases performance in any meaningful way in ruby 1.8 and 1.9.
...
How do I read image data from a URL in Python?
...8.0. Just use Image.open(response.raw). PIL automatically checks for that now and does the BytesIO wrapping under the hood. From: pillow.readthedocs.io/en/3.0.x/releasenotes/2.8.0.html
– Vinícius M
Feb 6 at 15:21
...
Rails: confused about syntax for passing locals to partials
...short answer is the render method looks at the first argument you pass in. If you pass in a hash (which includes :partial => 'foo', :locals => {blah blah blah}) then it will pass in all of your arguments as a hash and parse them accordingly.
If you pass in a string as your first argument, i...