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How do I sort a vector of pairs based on the second element of the pair?
... c++14, the best solution is very easy to write thanks to lambdas that can now have parameters of type auto. This is my current favorite solution
std::sort(v.begin(), v.end(), [](auto &left, auto &right) {
return left.second < right.second;
});
Just use a custom comparator (it's ...
Too many 'if' statements?
...ne 1-digit base 4 number {0,1,2,3} -- 4 different values, also important.
Now, a 1-digit base 4 number can be expressed as a 2-digit base 2 number; {0,1,2,3} = {00,01,10,11}, and so each output can be encoded with only 2 bits. From above, there are only 16 different outputs possible, so 16*2 = 32...
Git in Visual Studio - add existing project?
... you. Between a manual git init and this, this is my preferred method from now on.
– MrCC
Jun 20 '15 at 18:46
If you w...
How to show google.com in an iframe?
...t. I am not longer able to get this to work for me. The custom search link now redirects to google.ca/webhp?btnG=&gws_rd=ssl which forces ssl and appears to be blocked in a iframe now. I will keep investigating this but it looks like the party might be over on this one... :(
...
Efficient SQL test query or validation query that will work across all (or most) databases
...g_table WHERE 1=0
or
SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS
or
CALL NOW()
HSQLDB (tested with version 1.8.0.10)
Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Apache Commons DBCP's validationQuery, since the query doesn't return any rows
VAL...
How can I do DNS lookups in Python, including referring to /etc/hosts?
...
Does anyone know at which level this lookup is cached? Within Python? Or OS? Or DNS server?
– Simon East
Sep 18 '11 at 9:36
...
Android gradle: buildtoolsVersion vs compileSdkVersion
...
Android Studio 3.0 update
It is no longer as important to know the exact buildToolsVersion as it used to be because it is now chosen automatically.
The documentation says:
You no longer need to specify a version for the build tools (so, you
can now remove the android.buildToo...
CSS file not opening in Visual Studio 2010 SP1?
...suddenly stopped opening CSS. This was a quick fix and everything is good now.
– hacker
Sep 20 '11 at 19:00
7
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Why aren't my breakpoints working?
...ion went along these lines: "come on, please, you really think I wouldn't know better...... oh.")
Make sure you haven't accidentally set "Active Build Configuration" to "Release."
Under "Targets" in the graphical tree display of your project, right click on your Target and do "Get Info." Look fo...
What is Express.js?
...
Express.js is a Node.js framework. It's the most popular framework as of now (the most starred on NPM).
.
It's built around configuration and granular simplicity of Connect middleware. Some people compare Express.js to Ruby Sinatra vs. the bulky and opinionated Ruby on Rails.
2) What is the...