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Is it possible to figure out the parameter type and return type of a lambda?
Given a lambda, is it possible to figure out it's parameter type and return type? If yes, how?
4 Answers
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C++11 range based loop: get item by value or reference to const
... with copies.
Choose auto &x when you want to work with original items and may modify them.
Choose auto const &x when you want to work with original items and will not modify them.
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Cannot instantiate the type List [duplicate]
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Raw collection types are dangerous and should not be used or suggested for use in any new code targeted for Java 5+, end of story.
– Matt Ball
Oct 31 '11 at 22:15
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M_PI works with math.h but not with cmath in Visual Studio
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Interestingly I checked this on an app of mine and I got the same error.
I spent a while checking through headers to see if there was anything undef'ing the _USE_MATH_DEFINES and found nothing.
So I moved the
#define _USE_MATH_DEFINES
#include <cmath>
to be th...
Recommended way to insert elements into map [duplicate]
...lement exists. If it doesn't then it creates one using default constructor and returns a reference (or const reference to it).
Because map containers do not allow for duplicate key values, the insertion operation checks for each element inserted whether another element exists already in the contai...
Looking for jQuery find(..) method that includes the current node
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For jQuery 1.8 and up, you can use .addBack(). It takes a selector so you don't need to filter the result:
object.find('selector').addBack('selector')
Prior to jQuery 1.8 you were stuck with .andSelf(), (now deprecated and removed) whic...
time.sleep — sleeps thread or process?
...tantive part of the sleep operation is wrapped in a Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS block, allowing other threads to continue to execute while the current one sleeps. You can also test this with a simple python program:
import time
from threading import Thread
class worker(Thread)...
Align items in a stack panel?
... this is what I meant with the 'etc.' I guess the answer is no, and will have to do it the tough way, read my comment for JMD above
– Shimmy Weitzhandler
Jan 7 '10 at 20:29
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How to set button click effect in Android?
In Android, when I set background image to Button, I can not see any effect on button.
14 Answers
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Vim - how to run a command immediately when starting vim?
...o early, check :h startup:
At startup, Vim checks environment variables and files and sets values
accordingly. Vim proceeds in this order:
1. Set the 'shell' and 'term' option *SHELL* *COMSPEC* *TERM*
2. Process the arguments
3. Execute Ex commands, from environment variables and...