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Preferred method to store PHP arrays (json_encode vs serialize)
...I might occasionally come across the need to convert it to JSON for use in my web app but the vast majority of the time I will be using the array directly in PHP.
...
How to test multiple variables against a value?
...r the set version. Tuple's are very cheap to create and iterate over. On my machine at least, tuples are faster than sets so long as the size of the tuple is around 4-8 elements. If you have to scan more than that, use a set, but if you are looking for an item out of 2-4 possibilities, a tuple is...
Unresolved external symbol in object files
...ration, but not a definition.
Example:
// A.hpp
class A
{
public:
void myFunc(); // Function declaration
};
// A.cpp
// Function definition
void A::myFunc()
{
// do stuff
}
In your case, the definition cannot be found. The issue could be that you are including a header file, which brings i...
How to safely upgrade an Amazon EC2 instance from t1.micro to large? [closed]
...
From my experience, the way I do it is create a snapshot of your current image, then once its done you'll see it as an option when launching new instances. Simply launch it as a large instance at that point.
This is my approach ...
System.currentTimeMillis vs System.nanoTime
...ould use System.currentTimeMillis() or System.nanoTime() when updating my object's positions in my game? Their change in movement is directly proportional to the elapsed time since the last call and I want to be as precise as possible.
...
Postgresql 9.2 pg_dump version mismatch
...alled version(s) of pg_dump:
find / -name pg_dump -type f 2>/dev/null
My output was:
/usr/pgsql-9.3/bin/pg_dump
/usr/bin/pg_dump
There are two versions installed. To update pg_dump with the newer version:
sudo ln -s /usr/pgsql-9.3/bin/pg_dump /usr/bin/pg_dump --force
This will create the ...
Detect blocked popup in Chrome
... I think I found a way to make this work for new versions of Chrome. See my answer for details.
– InvisibleBacon
Nov 8 '10 at 16:50
2
...
Label encoding across multiple columns in scikit-learn
...'d rather just have one big LabelEncoder objects that works across all my columns of data.
21 Answers
...
Using semicolon (;) vs plus (+) with exec in find
...
ls testdir1; ls testdir2
vs
ls testdir1 testdir2
Doing the above in my shell mirrored the output in your question.
example of when you would want to use \+
Suppose two files, 1.tmp and 2.tmp:
1.tmp:
1
2
3
2.tmp:
0
2
3
With \;:
find *.tmp -exec diff {} \;
> diff: missing operand ...
What is in your .vimrc? [closed]
...
This isn't in my .vimrc file, but yesterday I learned about the ]p command. This pastes the contents of a buffer just like p does, but it automatically adjusts the indent to match the line the cursor is on! This is excellent for moving cod...