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Difference between std::result_of and decltype
I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example:
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How can I configure the font size for the tree item in the package explorer in Eclipse?
..., there was no way in Eclipse to change the font used for Package Explorer and other such views. You can only change the font for editor views. This is a policy decision on the part of the Eclipse developers (see, e.g., bugs 49548, 202091). (Grumble.) The font used is the one set by the general look...
How do I reattach to a detached mosh session?
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Mosh: You have a detached Mosh session on this server (mosh [12345]).
And can run this command:
kill 12345
Also, to close all mosh connections you can:
kill `pidof mosh-server`
Note that if you are currently connected via mosh, this last command will also disconnect you.
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Finding what methods a Python object has
...t an AttributeError, you can use this instead:
getattr( is intolerant of pandas style python3.6 abstract virtual sub-classes. This code does the same as above and ignores exceptions.
import pandas as pd
df = pd.DataFrame([[10, 20, 30], [100, 200, 300]],
columns=['foo', 'bar',...
Where to define custom error types in Ruby and/or Rails?
...ou define exceptions in this way:
gem_dir/lib/gem_name/exceptions.rb
and defined as:
module GemName
class AuthenticationError < StandardError; end
class InvalidUsername < AuthenticationError; end
end
an example of this would be something like this in httparty
For Ruby on Rails
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What is the difference between LINQ ToDictionary and ToLookup
What is the difference between LINQ ToDictionary and ToLookup? They seem to do the same thing.
2 Answers
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What is the difference between And and AndAlso in VB.NET?
In VB.NET, what is the difference between And and AndAlso ? Which should I use?
11 Answers
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Difference between “on-heap” and “off-heap”
Ehcache talks about on-heap and off-heap memory. What is the difference? What JVM args are used to configure them?
6 Answ...
Is inline assembly language slower than native C++ code?
I tried to compare the performance of inline assembly language and C++ code, so I wrote a function that add two arrays of size 2000 for 100000 times. Here's the code:
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How to change ViewPager's page?
I'm using ViewPager in my app and define it in the main Activity. Inside onCreate method I load some number of pages from SharedPreferences and then pass it to PagerAdapter:
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