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What is the difference between atan and atan2 in C++?
...ng the arctangent of all four quadrants. std::atan only allows calculating from quadrants 1 and 4.
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How do I convert a numpy array to (and display) an image?
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You could use PIL to create (and display) an image:
from PIL import Image
import numpy as np
w, h = 512, 512
data = np.zeros((h, w, 3), dtype=np.uint8)
data[0:256, 0:256] = [255, 0, 0] # red patch in upper left
img = Image.fromarray(data, 'RGB')
img.save('my.png')
img.show()
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How to validate phone numbers using regex
...ing code is going to be a waste of time if the numbers are allowed to come from outside the US.
– Daniel Earwicker
Jul 21 '09 at 12:13
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Is quitting an application frowned upon?
... there. Using startForeground(int, Notification) I can almost stop Android from killing the Service...?
– Ted
Jan 9 '10 at 18:30
67
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Ember.js or Backbone.js for Restful backend [closed]
...ifest). Additionally these header values won't help during the first visit from a user—which generally is the most critical in deciding whether the user will stay and use your app. Saying all that 30kb file difference doesn't seem like that big of a deal to me. Is that raw or a minified and gzippe...
Remove all whitespace in a string
I want to eliminate all the whitespace from a string, on both ends, and in between words.
10 Answers
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How to install PyQt4 on Windows using pip?
... just a pure python code package, which means it can be hard to install it from source.
Make sure you grab the correct Windows wheel file (python version, 32/64 bit), and then use pip to install it - e.g:
C:\path\where\wheel\is\> pip install PyQt4-4.11.4-cp35-none-win_amd64.whl
Should properl...
What does it mean to inflate a view from an xml file?
...o android development and keep coming across references to Inflating views from a layout xml file. I googled and searched the development guide but still wasn't able to pick up a sense for what it means. If someone could provide a very simple example, it'd be much appreciated.
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Git: “Corrupt loose object”
Whenever I pull from my remote, I get the following error about compression. When I run the manual compression, I get the same:
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Mechanisms for tracking DB schema changes [closed]
...version number of the database. The N.sql files are crafted by hand, to go from version (N-1) to version N of the database.
They can be used to add tables, add columns, migrate data from an old to a new column format then drop the column, insert "master" data rows such as user types, etc. Basically...