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Ruby: Calling class method from instance
In Ruby, how do you call a class method from one of that class's instances? Say I have
9 Answers
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How to return smart pointers (shared_ptr), by reference or by value?
...ilers. I know for a fact that Visual C++ compilers implement RVO even when all optimizations are turned off. And with C++11's move semantics, this concern is even less relevant. (But the only way to be sure is to profile and experiment.)
If you're still not convinced, Dave Abrahams has an article t...
为什么编译好的libcurl静态lib用不了？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...代码
#ifdef CURL_STATICLIB
# define CURL_EXTERN
#elif defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__)
# if defined(BUILDING_LIBCURL)
# define CURL_EXTERN __declspec(dllexport)
# else
# define CURL_EXTERN __declspec(dllimport)
# endif
#elif defined(BUILDING_LIBCUR...
Git error: “Host Key Verification Failed” when connecting to remote repository
...as no way to know whether the host on the other end of the connection is really domain.com. (If the wrong key is in /etc, someone with administrative privileges will have to update the system-wide file.)
I strongly encourage you to consider having users authenticate with keys as well. That way, ssh...
HTML Entity Decode [duplicate]
...de creates an empty (detached from DOM) div and sets it's innerHTML and finally retrieved back as normal text. It's not surrounding it with a DIV, but putting it in a div. I putting some emphasis over this since it's crucial to understand how jQuery works.
– Christian
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Parse JSON in TSQL
...have a huge masochistic streak and want to write a JSON parser in SQL
Normally, folk ask for JSON output from the DB and there are examples on the internet. But into a DB?
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Django: How do I add arbitrary html attributes to input fields on a form?
... earlier to modify 3 fields: ``` for field_name in ['image', 'image_small', 'image_mobile']: field = self.fields.get(field_name) field.widget.attrs['data-file'] = 'file' ```
– Stuart Axon
Jun 6 '14 at 11:59
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what is the difference between a portlet and a servlet?
...s for web containers (and servlets). Though there are definitely strong parallels between these two standards they differ in containers, APIs, life cycle, configuration, deployment, etc.
The main difference between portlet vs. servlet could be that while servlet always responds to single type of a...
How to do exponential and logarithmic curve fitting in Python? I found only polynomial fitting
...ptimize.curve_fit(lambda t,a,b: a*numpy.exp(b*t), x, y)
(array([ 5.60728326e-21, 9.99993501e-01]),
array([[ 4.14809412e-27, -1.45078961e-08],
[ -1.45078961e-08, 5.07411462e+10]]))
# oops, definitely wrong.
>>> scipy.optimize.curve_fit(lambda t,a,b: a*numpy.exp(b*t), x, y...
Border around specific rows in a table?
...at can put a border around specific rows in a table. Yes, I know I'm not really supposed to use tables for layout but I don't know enough CSS to completely replace it yet.
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