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How to sum a variable by group
...n has numbers that represent the number of times I saw the specific groups from "Category".
15 Answers
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What's the difference between a mock & stub?
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From what you wrote I can tell that mocks = stubs + expectations and verifications, because mocks "provide canned answers to calls made during the test, usually not responding at all to anything outside what's programmed in f...
Does the GitHub traffic graph include your own views?
...ry that shows 2 "unique visitors" for a day that I probably logged into it from my home computer and my work one. Given that nobody else has any reason to know about the repo, I suspect different computers count as different unique visitors, even when you're logged in (which I always am on both).
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Checking user's homepage in Internet Explorer
...le, if www.microsoft.com is set as your homepage, and you call this method from a page on the Microsoft® Web site, then the isHomePage method returns true. However, if your homepage is set to www.microsoft.com and you call this method from a page on a different domain, the method will return false....
How do I include a pipe | in my linux find -exec command?
...cient solution in terms of number of command invocations is the suggestion from Paul Tomblin:
find . -name "file_*" -follow -type f -print0 | xargs -0 zcat | agrep -dEOE 'grep'
... which costs one invocation of find, one invocation of xargs, a few invocations of zcat and one invocation of agrep.
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Difference between FOR and AFTER triggers?
...tely right.
Here is MSDN article Exploring SQL Server Triggers
A paragraph from the article:
That syntax is also acceptable in older versions of SQL Server. However, now that there are two types of triggers in SQL Server 2000, I prefer to refer to FOR triggers as AFTER triggers. Thus, for the remai...
How can I generate a unique ID in Python? [duplicate]
...st a sequence generator. Statistically unique IDs typically are generated from random data; at least one class of UUIDs works that way.
– Glenn Maynard
Jul 31 '09 at 4:38
1
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How do you add Boost libraries in CMakeLists.txt?
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Put this in your CMakeLists.txt file (change any options from OFF to ON if you want):
set(Boost_USE_STATIC_LIBS OFF)
set(Boost_USE_MULTITHREADED ON)
set(Boost_USE_STATIC_RUNTIME OFF)
find_package(Boost 1.45.0 COMPONENTS *boost libraries here*)
if(Boost_FOUND)
include_dir...
cd into directory without having permission
...ou do).
If it is someone else's directory, you'll probably need some help from the owner to change the permissions so that you can access it (or you'll need help from root to change the permissions for you).
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How to initialize a private static const map in C++?
...lass::myMap = {
{1, 2},
{3, 4},
{5, 6}
};
See also this section from Professional C++, on unordered_maps.
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