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Order discrete x scale by frequency/value
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# Manual levels
cyl_table <- table(mtcars$cyl)
cyl_levels <- names(cyl_table)[order(cyl_table)]
mtcars$cyl2 <- factor(mtcars$cyl, levels = cyl_levels)
# Just to be clear, the above line is no different than:
# mtcars$cyl2 <- factor(mtcars$cyl, levels = c("6","4","8"))
# You can man...
What's the best name for a non-mutating “add” method on an immutable collection?
Sorry for the waffly title - if I could come up with a concise title, I wouldn't have to ask the question.
74 Answers
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How to disable / enable dialog negative positive buttons?
...awable.ic_dialog_info);
builder.setTitle("Alert dialog title");
builder.setMessage("This is the example code snippet to disable button if edittext attached to dialog is empty.");
builder.setPositiveButton("PositiveButton",
new DialogInterface.OnClickListener() {
public void onCli...
Convert string to symbol-able in ruby
...tiveSupport::CoreExtensions::String::Inflections module that provides such methods. They're all worth looking at. For your example:
'Book Author Title'.parameterize.underscore.to_sym # :book_author_title
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How to update attributes without validation
...te', a.state)
Note:- 'update_attribute' update only one attribute at a time from the code given in question i think it will work for you.
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foll...
Can you disable tabs in Bootstrap?
...for cursor so use knows why they can't click it
– arbme
Feb 11 '12 at 3:11
23
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Put content in HttpResponseMessage object?
Several months ago, Microsoft decided to change up the HttpResponseMessage class. Before, you could simply pass a data type into the constructor, and then return the message with that data, but not anymore.
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How can I save an image with PIL?
I have just done some image processing using the Python image library (PIL) using a post I found earlier to perform fourier transforms of images and I can't get the save function to work. The whole code works fine but it just wont save the resulting image:
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Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence
...e json.dump() and leave it to the file object to encode:
with open('filename', 'w', encoding='utf8') as json_file:
json.dump("ברי צקלה", json_file, ensure_ascii=False)
Caveats for Python 2
For Python 2, there are some more caveats to take into account. If you are writing this to a fil...
How to determine the number of days in a month in SQL Server?
... answered Mar 27 '09 at 19:00
Mehrdad AfshariMehrdad Afshari
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