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What is the _snowman param in Ruby on Rails 3 forms for?
...ribute, which then tells it to encode all of the characters as UTF-8, even ones that can be encoded in Latin-1.
Keep in mind that in Ruby 1.8, it is extremely trivial to get Latin-1 data into your UTF-8 database (since nothing in the entire stack checks that the bytes that the user sent at any poin...
What is “Argument-Dependent Lookup” (aka ADL, or “Koenig Lookup”)?
...is states1:
You don’t have to qualify the namespace for functions if one or more argument types are defined in the namespace of the function.
A simple code example:
namespace MyNamespace
{
class MyClass {};
void doSomething(MyClass);
}
MyNamespace::MyClass obj; // global obje...
How do I make a list of data frames?
...h n elements.
Reading multiple files into a list of data frames
This is done pretty easily when reading in files. Maybe you've got files data1.csv, data2.csv, ... in a directory. Your goal is a list of data.frames called mydata. The first thing you need is a vector with all the file names. You can...
Convert integer to hexadecimal and back again
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Since this has not been mentioned here: If you use a lowecase x (e.g. ToString("x4) you get a lowercase hex value (e.g. b76).
– Skalli
Feb 28 '14 at 9:17
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Setting log level of message at runtime in slf4j
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+1 @RichardFearn And one cannot undo the comment upvote after 60 seconds, meh. Feature request is existing meanwhile: bugzilla.slf4j.org/show_bug.cgi?id=133
– jan
Mar 28 '14 at 10:40
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Generating a PNG with matplotlib when DISPLAY is undefined
...tlib chooses an x-using backend by default. I just had the same problem on one of my servers. The solution for me was to add the following code in a place that gets read before any other pylab/matplotlib/pyplot import:
import matplotlib
# Force matplotlib to not use any Xwindows backend.
matplotli...
Fragment onResume() & onPause() is not called on backstack
... the replaced fragment) and onResume (of the replacing fragment). This is done regardless of any activity...
– David Refaeli
Nov 20 '18 at 9:40
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fatal: The current branch master has no upstream branch
I'm trying to push one of my projects to github, and I keep getting this error:
22 Answers
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How do I move a file with Ruby?
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An old question, i'm surprised no one answered this simple solution. You don't need fileutils or a systemcall, just rename the file to the new location.
File.rename source_path, target_path
Happy coding
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Is there a difference between x++ and ++x in java?
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Yeah, I also ended up upvoting this one because of the clear prose explanation at the start. (Hmm, didn't know you can do cursive in comments nowadays... cool)
– Jonik
Jul 7 '09 at 21:45
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