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How to ssh to vagrant without actually running “vagrant ssh”?
...ecure_private_key \
vagrant@localhost \
-p $PORT \
"$@"
As a one-liner (with thanks to kgadek):
ssh $(vagrant ssh-config | awk 'NR>1 {print " -o "$1"="$2}') localhost
To account for when you have more than one vagrant host, this will select the desired host, as well as cull blank...
How does Spring autowire by name when more than one matching bean is found?
...es, it is often necessary to have more control over the selection process. One way to accomplish this is with Spring's @Qualifier annotation. This allows for associating qualifier values with specific arguments, narrowing the set of type matches so that a specific bean is chosen for each argument. I...
What exactly is a Maven Snapshot and why do we need it?
I am a bit confused about the meaning of a Maven Snapshot and why we build one?
13 Answers
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Django filter versus get for single object?
...a preferred way to retrieve an object in Django when you're expecting only one?
13 Answers
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Similar to jQuery .closest() but traversing descendants?
...ry .closest() but for traversing descendants and returning only closest ones?
16 Answers
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How to select all instances of a variable and edit variable name in Sublime
...arching the answer for Ubuntu, so I guess my answer could be useful to someone.
Easy way to do it: AltF3.
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Is #pragma once a safe include guard?
...eason not to use a standard #ifndef include guard. It works just fine. The one caveat is that GCC didn't support #pragma once before version 3.4.
I also found that, at least on GCC, it recognizes the standard #ifndef include guard and optimizes it, so it shouldn't be much slower than #pragma once.
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How can you represent inheritance in a database?
...table as in your first option is probably the simplest design. As you mentioned, many attributes that are subtype-specific will have to be given a NULL value on rows where these attributes do not apply. With this model, you would have one policies table, which would look something like this:
+------...
PostgreSQL - fetch the row which has the Max value for a column
... vary in production based on actual machine load/data access spread. When one query appears slightly faster (<20%) than the other but has a much higher cost, it will generally be wiser to choose the one with higher execution time but lower cost.
When you expect that there will be no competition...
What is the purpose of std::make_pair vs the constructor of std::pair?
...//www.cplusplus.com/reference/std/utility/make_pair/
pair <int,int> one;
pair <int,int> two;
one = make_pair (10,20);
two = make_pair (10.5,'A'); // ok: implicit conversion from pair<double,char>
Aside from the implicit conversion bonus of it, if you didn't use make_pair you'd ...