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How do I change the color of the text in a UIPickerView under iOS 7?
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There is a function in the delegate method that is more elegant:
Objective-C:
- (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *ti...
INSERT … ON DUPLICATE KEY (do nothing)
... ON DUPLICATE KEY UPDATE id=id (it won't trigger row update even though id is assigned to itself).
If you don't care about errors (conversion errors, foreign key errors) and autoincrement field exhaustion (it's incremented even if the row is not inserted due to duplicate key), then use INSERT IGNOR...
pandas dataframe columns scaling with sklearn
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I am not sure if previous versions of pandas prevented this but now the following snippet works perfectly for me and produces exactly what you want without having to use apply
>>> import pandas as pd
>>> from sklearn.preprocessing import MinMaxScaler
>>&g...
python numpy machine epsilon
I am trying to understand what is machine epsilon. According to the Wikipedia, it can be calculated as follows:
3 Answers
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How to: Define theme (style) item for custom widget
...tyle which I can apply to the widget as it's used, but I'd prefer to set this up through a theme. In R.styleable I see widget style attributes like imageButtonStyle and textViewStyle . Is there any way to create something like that for the custom widget I wrote?
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How to open files relative to home directory
... fails with Errno::ENOENT: No such file or directory , even if the file exists:
4 Answers
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Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
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The .inspect method of any object should format is correctly for display, just do..
<%= theobject.inspect %>
The .methods method may also be of use:
<%= theobject.methods.inspect %>
It may help to put that in <pre> tags, depending on the data
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Python Nose Import Error
... remove it, you'll have to change your import to import dir.foo, where dir is the name of your directory.
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how to convert an RGB image to numpy array?
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You can use newer OpenCV python interface (if I'm not mistaken it is available since OpenCV 2.2). It natively uses numpy arrays:
import cv2
im = cv2.imread("abc.tiff",mode='RGB')
print type(im)
result:
<type 'numpy.ndarray'>
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How to set Meld as git mergetool
...nfig --global mergetool.meld.path /c/Program files (x86)/meld/bin/meld
This is what is described in "How to get meld working with git on Windows"
Or you can adopt the wrapper approach described in "Use Meld with Git on Windows"
# set up Meld as the default gui diff tool
$ git config --global di...