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How does facebook, gmail send the real time notification?
...ever, this can be pretty network intensive, and you often make pointless requests, because nothing has happened.
The way Facebook does it is using the comet approach, rather than polling on an interval, as soon as one poll completes, it issues another one. However, each request to the script on th...
Using awk to remove the Byte-order mark
...ecord is printed.
Enjoy!
-- ADDENDUM --
Unicode Byte Order Mark (BOM) FAQ includes the following table listing the exact BOM bytes for each encoding:
Bytes | Encoding Form
--------------------------------------
00 00 FE FF | UTF-32, big-endian
FF FE 00 00 | UTF-32, little-endian
F...
Inline SVG in CSS
...100%' height='100%'/></svg>");
}
http://jsfiddle.net/6WAtQ/
(Note that the SVG content needs to be url-escaped for this to work, e.g. # gets replaced with %23.)
This works in IE 9 (which supports SVG). Data-URLs work in older versions of IE too (with limitations), but they don...
Static function variables in Swift
...the natural evolution of programming. Trying to code in old fashion ways requires hacks. In my opinion, adding an extra nested data type as opposed to utilising variable capturing reduces code readability.
– nstein
Jul 25 '16 at 12:07
...
Why do C++ libraries and frameworks never use smart pointers?
...<typename T>
struct Pointer {
#ifdef <Cpp11>
typedef std::unique_ptr<T> type;
#else
typedef T* type;
#endif
};
And in your code use it as:
Pointer<int>::type p;
For those who say that a smart pointer and a raw pointer are different, I agree with that. The code above ...
How to implement my very own URI scheme on Android
...ould be anything), and made sure to add the DEFAULT category (as this is required for all implicit intents). Also notice how I added the category BROWSABLE - this is not necessary, but it will allow your URIs to be openable from the browser (a nifty feature).
...
Checking for a dirty index or untracked files with Git
...ository has staged changes (not yet committed) use this:
git diff-index --quiet --cached HEAD --
If it exits with 0 then there were no differences (1 means there were differences).
To check whether a working tree has changes that could be staged:
git diff-files --quiet
The exit code is the...
Python constructors and __init__
...e new method, rendering the first method inaccessible.
As to your general question about constructors, Wikipedia is a good starting point. For Python-specific stuff, I highly recommend the Python docs.
share
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Select by partial string from a pandas DataFrame
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Is it possible to convert .str.contains to use .query() api?
– zyxue
Mar 1 '17 at 17:25
3
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In WPF, what are the differences between the x:Name and Name attributes?
... create fields.
Whether you should use one or the other is really a style question, not a technical one. I will leave that to others for a recommendation.
See also AutomationProperties.Name VS x:Name, AutomationProperties.Name is used by accessibility tools and some testing tools.
...